diff --git a/folkugat_web/api/__init__.py b/folkugat_web/api/__init__.py
index 12f6d40..0031b34 100644
--- a/folkugat_web/api/__init__.py
+++ b/folkugat_web/api/__init__.py
@@ -5,3 +5,5 @@ from .sessio import *
 from .sessions import *
 from .tema import *
 from .temes import *
+
+__all__ = ["router"]
diff --git a/folkugat_web/api/sessio/index.py b/folkugat_web/api/sessio/index.py
index 17249f6..f8cdd62 100644
--- a/folkugat_web/api/sessio/index.py
+++ b/folkugat_web/api/sessio/index.py
@@ -1,9 +1,15 @@
 from typing import Annotated
 
-from fastapi import Form, Request
+from fastapi import Form, HTTPException, Request
+from fastapi.responses import HTMLResponse
 from folkugat_web.api import router
 from folkugat_web.fragments import live, sessio
-from folkugat_web.services import auth
+from folkugat_web.services import auth, files
+from folkugat_web.services import playlists as playlists_service
+from folkugat_web.services.lilypond import build as lilypond_build
+from folkugat_web.services.lilypond import render as lilypond_render
+from folkugat_web.services.lilypond import source as lilypond_source
+from folkugat_web.services.temes import scores as scores_service
 from folkugat_web.services.temes import write as temes_service
 from folkugat_web.templates import templates
 
@@ -197,3 +203,27 @@ def set_tema_new(
         entry_id=entry_id,
         tema_id=new_tema.id,
     )
+
+
+@router.get("/api/sessio/{session_id}/set/{set_id}/score")
+async def render(
+    request: Request,
+    _: auth.RequireLogin,
+    session_id: int,
+    set_id: int,
+):
+    set_entry = playlists_service.get_set(session_id=session_id, set_id=set_id)
+    if not set_entry:
+        raise HTTPException(status_code=404, detail="Could not find set!")
+    tune_set = lilypond_build.set_from_set(set_entry=set_entry)
+    set_source = lilypond_source.set_source(tune_set=tune_set)
+    pdf_result = await lilypond_render.render(
+        source=set_source,
+        output=lilypond_render.RenderOutput.PDF,
+    )
+    if output_filename := pdf_result.result:
+        score_render_url = files.get_db_file_path(output_filename)
+        # return temes.score_render(request=request, score_id=score_id, score_render_url=score_render_url)
+        return HTMLResponse(content=score_render_url)
+    else:
+        return HTMLResponse()
diff --git a/folkugat_web/api/sessions/editor.py b/folkugat_web/api/sessions/editor.py
index c63e6c7..4a85bfb 100644
--- a/folkugat_web/api/sessions/editor.py
+++ b/folkugat_web/api/sessions/editor.py
@@ -1,5 +1,5 @@
 import datetime
-from typing import Annotated, Optional
+from typing import Annotated
 
 from fastapi import Form, Request
 from folkugat_web.api import router
diff --git a/folkugat_web/api/tema/index.py b/folkugat_web/api/tema/index.py
index 8d15f7e..20ac616 100644
--- a/folkugat_web/api/tema/index.py
+++ b/folkugat_web/api/tema/index.py
@@ -48,6 +48,12 @@ def contingut(request: Request, logged_in: auth.LoggedIn, tema_id: int):
 
 @router.delete("/api/tema/{tema_id}")
 def delete_tema(_: auth.RequireLogin, tema_id: int):
+    tema = temes_q.get_tema_by_id(tema_id)
+    if not tema:
+        raise HTTPException(status_code=404, detail="Could not find tune")
+    tema = temes_q.tema_compute_stats(tema=tema)
+    if tema.stats:
+        raise HTTPException(status_code=400, detail="Can't delete a tune that has been played in a set!")
     temes_w.delete_tema(tema_id=tema_id)
     files_service.clean_orphan_files()
     return HTMLResponse(headers={
diff --git a/folkugat_web/api/tema/scores.py b/folkugat_web/api/tema/scores.py
index 37a9b23..ce7daca 100644
--- a/folkugat_web/api/tema/scores.py
+++ b/folkugat_web/api/tema/scores.py
@@ -7,11 +7,11 @@ from fastapi.responses import HTMLResponse
 from folkugat_web.api import router
 from folkugat_web.fragments import temes
 from folkugat_web.fragments.tema import scores as scores_fragments
-from folkugat_web.services import auth, files, lilypond
-from folkugat_web.services.temes import properties as properties_service
-from folkugat_web.services.temes import query as temes_q
+from folkugat_web.services import auth, files
+from folkugat_web.services.lilypond import build as lilypond_build
+from folkugat_web.services.lilypond import render as lilypond_render
+from folkugat_web.services.lilypond import source as lilypond_source
 from folkugat_web.services.temes import scores as scores_service
-from folkugat_web.utils import FnChain
 
 
 @router.get("/api/tema/{tema_id}/score/{score_id}")
@@ -36,10 +36,19 @@ async def set_score(
     if not score:
         raise HTTPException(status_code=404, detail="Could not find lyric!")
 
-    full_source = scores_service.build_single_tune_full_source(tema_id=tema_id, source=source)
-    pdf_filename = files.create_tema_filename(tema_id=tema_id)
-    pdf_filename, errors = await lilypond.render(source=full_source, fmt="pdf", output_filename=pdf_filename)
-    if errors:
+    tune = lilypond_build.tune_from_tema_id(tema_id=tema_id, score_source=source)
+    tune_source = lilypond_source.tune_source(tune=tune)
+    pdf_result, png_result = await render_tune(tune_source=tune_source, tema_id=tema_id)
+    if errors := pdf_result.error:
+        new_score = dataclasses.replace(
+            score,
+            source=source,
+            title=title,
+            errors=errors,
+        )
+    elif png_result is None:
+        raise RuntimeError(f"Received empty png_result with pdf_result: {pdf_result}")
+    elif errors := png_result.error:
         new_score = dataclasses.replace(
             score,
             source=source,
@@ -47,21 +56,43 @@ async def set_score(
             errors=errors,
         )
     else:
-        png_filename = files.create_tema_filename(tema_id=tema_id)
-        png_filename, errors = await lilypond.render(source=full_source, fmt="png", output_filename=png_filename)
+        pdf_file = pdf_result.result
+        png_file = png_result.result
         new_score = dataclasses.replace(
             score,
             source=source,
             title=title,
-            pdf_url=files.get_db_file_path(pdf_filename) if pdf_filename else None,
-            img_url=files.get_db_file_path(png_filename) if png_filename else None,
-            errors=errors,
+            pdf_url=files.get_db_file_path(pdf_file) if pdf_file else None,
+            img_url=files.get_db_file_path(png_file) if png_file else None,
+            errors=[],
         )
     scores_service.update_score(score=new_score)
     files.clean_orphan_files()
     return scores_fragments.score(request=request, logged_in=logged_in, score=new_score)
 
 
+async def render_tune(
+    tune_source: str,
+    tema_id: int,
+) -> tuple[lilypond_render.RenderResult, lilypond_render.RenderResult | None]:
+    async with files.tmp_file(content=tune_source) as source_file:
+        pdf_file = files.create_tema_filename(tema_id=tema_id)
+        pdf_result = await lilypond_render.render_file(
+            input_file=source_file,
+            output=lilypond_render.RenderOutput.PDF,
+            output_file=pdf_file,
+        )
+        if pdf_result.error:
+            return pdf_result, None
+        png_file = files.create_tema_filename(tema_id=tema_id)
+        png_result = await lilypond_render.render_file(
+            input_file=source_file,
+            output=lilypond_render.RenderOutput.PNG_CROPPED,
+            output_file=png_file,
+        )
+        return pdf_result, png_result
+
+
 @router.post("/api/tema/{tema_id}/score")
 def add_score(
     request: Request,
@@ -108,13 +139,17 @@ async def render(
     score_id: int,
     source: Annotated[str, Form()],
 ):
-    full_source = scores_service.build_single_tune_full_source(tema_id=tema_id, source=source)
-    output_filename, errors = await lilypond.render(source=full_source, fmt="png")
-    if output_filename:
+    tune = lilypond_build.tune_from_tema_id(tema_id=tema_id, score_source=source)
+    full_source = lilypond_source.tune_source(tune=tune)
+    png_result = await lilypond_render.render(
+        source=full_source,
+        output=lilypond_render.RenderOutput.PNG_CROPPED,
+    )
+    if output_filename := png_result.result:
         score_render_url = files.get_db_file_path(output_filename)
         return temes.score_render(request=request, score_id=score_id, score_render_url=score_render_url)
     else:
-        return temes.score_render(request=request, score_id=score_id, errors=errors)
+        return temes.score_render(request=request, score_id=score_id, errors=png_result.error)
 
 
 @router.put("/api/tema/{tema_id}/score/{score_id}/show")
diff --git a/folkugat_web/assets/static/css/main.css b/folkugat_web/assets/static/css/main.css
index 94bfa15..c27b609 100644
--- a/folkugat_web/assets/static/css/main.css
+++ b/folkugat_web/assets/static/css/main.css
@@ -602,6 +602,10 @@ video {
   margin: 0.75rem;
 }
 
+.m-4 {
+  margin: 1rem;
+}
+
 .m-6 {
   margin: 1.5rem;
 }
@@ -701,6 +705,10 @@ video {
   height: 80%;
 }
 
+.h-auto {
+  height: auto;
+}
+
 .h-px {
   height: 1px;
 }
@@ -729,6 +737,10 @@ video {
   max-width: 56rem;
 }
 
+.max-w-full {
+  max-width: 100%;
+}
+
 .max-w-xl {
   max-width: 36rem;
 }
@@ -871,6 +883,10 @@ video {
   border-radius: 0.25rem;
 }
 
+.rounded-lg {
+  border-radius: 0.5rem;
+}
+
 .rounded-md {
   border-radius: 0.375rem;
 }
@@ -911,6 +927,11 @@ video {
   background-color: rgb(62 56 52 / var(--tw-bg-opacity, 1));
 }
 
+.bg-white {
+  --tw-bg-opacity: 1;
+  background-color: rgb(255 255 255 / var(--tw-bg-opacity, 1));
+}
+
 .p-0 {
   padding: 0px;
 }
@@ -961,6 +982,11 @@ video {
   padding-bottom: 0.5rem;
 }
 
+.py-4 {
+  padding-top: 1rem;
+  padding-bottom: 1rem;
+}
+
 .pl-5 {
   padding-left: 1.25rem;
 }
diff --git a/folkugat_web/assets/templates/fragments/tema/editor/score_render.html b/folkugat_web/assets/templates/fragments/tema/editor/score_render.html
index 2af1936..bfbc9ec 100644
--- a/folkugat_web/assets/templates/fragments/tema/editor/score_render.html
+++ b/folkugat_web/assets/templates/fragments/tema/editor/score_render.html
@@ -2,7 +2,10 @@
 <h5 class="text text-beige"> Previsualització </h5>
 <hr class="h-px mt-1 mb-3 bg-beige border-0">
   {% if score_render_url %}
-    <img class="my-2" src="{{ score_render_url }}" />
+    <div class="flex flex-col items-center
+                bg-white rounded-lg">
+      <img class="m-4" src="{{ score_render_url }}" />
+    </div>
   {% else %}
     <ol class="text-red-400">
       {% for error in errors %}
diff --git a/folkugat_web/assets/templates/fragments/tema/score.html b/folkugat_web/assets/templates/fragments/tema/score.html
index c702c28..3970382 100644
--- a/folkugat_web/assets/templates/fragments/tema/score.html
+++ b/folkugat_web/assets/templates/fragments/tema/score.html
@@ -47,22 +47,25 @@
     {% endif %}
   </h5>
   <hr class="h-px mt-1 mb-3 bg-beige border-0">
-  <div class="flex flex-col items-center">
-    {% if score.img_url is not none %}
-      <div class="flex justify-center">
-        <a href="{{ score.pdf_url or score.img_url }}" target="_blank">
-          <img class="m-2" src="{{ score.img_url }}" />
-        </a>
+  {% if score.img_url is not none %}
+  <div class="flex flex-col items-center
+              bg-white rounded-lg ">
+    <div class="flex justify-center">
+      <a href="{{ score.pdf_url or score.img_url }}" target="_blank">
+        <img class="py-4 px-2 max-w-full h-auto" src="{{ score.img_url }}" />
+      </a>
+    </div>
+    {% if score.pdf_url is not none %}
+      <div class="bg-beige border rounded border-beige m-2 p-1">
+        <a href="{{ score.pdf_url }}" target="_blank">Obre el PDF</a>
       </div>
-      {% if score.pdf_url is not none %}
-        <div class="text-beige border rounded border-beige m-2 p-1">
-          <a href="{{ score.pdf_url }}" target="_blank">Obre el PDF</a>
-        </div>
-      {% endif %}
-    {% elif score.pdf_url is not none %}
-      {% set pdf_url = score.pdf_url %}
-      {% include "fragments/pdf_viewer.html" %}
     {% endif %}
   </div>
+  {% elif score.pdf_url is not none %}
+  <div class="flex flex-col items-center">
+    {% set pdf_url = score.pdf_url %}
+    {% include "fragments/pdf_viewer.html" %}
+  </div>
+  {% endif %}
 </div>
 {% endif %}
diff --git a/folkugat_web/assets/templates/fragments/tema/title.html b/folkugat_web/assets/templates/fragments/tema/title.html
index b30252d..ef1b54e 100644
--- a/folkugat_web/assets/templates/fragments/tema/title.html
+++ b/folkugat_web/assets/templates/fragments/tema/title.html
@@ -10,11 +10,13 @@
     <i class="fa fa-pencil" aria-hidden="true"></i>
   </button>
   {% include "fragments/tema/visibility.html" %}
-  <button title="Canvia el títol"
+  {% if not tema.stats %}
+  <button title="Esborra el tema"
           class="text-beige text-2xl mx-2"
           hx-delete="/api/tema/{{ tema.id }}"
           hx-swap="outerHTML">
     <i class="fa fa-times" aria-hidden="true"></i>
   </button>
   {% endif %}
+  {% endif %}
 </div>
diff --git a/folkugat_web/assets/templates/lilypond/score_template.ly b/folkugat_web/assets/templates/lilypond/score_template.ly
index 093f1fa..c95f8cc 100644
--- a/folkugat_web/assets/templates/lilypond/score_template.ly
+++ b/folkugat_web/assets/templates/lilypond/score_template.ly
@@ -1,19 +1,3 @@
-% -----------------------------------------------------
-% Comandes últils
-% -----------------------------------------------------
-% Anacrusa: \partial 2 (2 = blanca)
-%
-% Repetició amb caselles:
-%    \repeat volta 2 {
-%      %%%
-%      \alternative {
-%        \volta 1 { %%% }
-%        \volta 2 { %%% }
-%      }
-%    }
-%
-% -----------------------------------------------------
-
 \new ChordNames {
   \chords {
     \set chordChanges = ##t
@@ -50,11 +34,21 @@
 
     % A
     \mark \default
-
-    \bar "||" \break
+    \repeat volta 2 {
+      \alternative {
+        \volta 1 { }
+        \volta 2 { }
+      }
+    }
 
     % B
     \mark \default
+    \repeat volta 2 {
+      \alternative {
+        \volta 1 { }
+        \volta 2 { }
+      }
+    }
 
     \bar "|."
   }
diff --git a/folkugat_web/assets/templates/lilypond/single_score.ly b/folkugat_web/assets/templates/lilypond/single_tune.ly
similarity index 66%
rename from folkugat_web/assets/templates/lilypond/single_score.ly
rename to folkugat_web/assets/templates/lilypond/single_tune.ly
index 9e57ad1..bff95ab 100644
--- a/folkugat_web/assets/templates/lilypond/single_score.ly
+++ b/folkugat_web/assets/templates/lilypond/single_tune.ly
@@ -6,11 +6,9 @@
 }
 
 \header {
-  title = \markup { "{{ tema.title | safe }}" }
-  {% if tema.composer() %}
-  composer = "{{ tema.composer() | safe }}"
-  {% elif tema.origin() %}
-  composer = "{{ tema.origin() | safe }}"
+  title = \markup { "{{ tune.header.title | safe }}" }
+  {% if tune.header.composer %}
+  composer = "{{ tune.header.composer | safe }}"
   {% endif %}
 
   tagline = "Partitura generada amb LilyPond"
@@ -19,15 +17,17 @@
 
 \markup \vspace #2
 
+{% if tune.score_source is not none %}
 \score {
   \language "english"
   <<
 {{ score_beginning }}
-{{ score_source | safe }}
+{{ tune.score_source | safe }}
   >>
 }
-{% if lyrics_text is not none %}
-{% for line in lyrics_text.lines %}
+{% endif %}
+{% if tune.lyrics is not none %}
+{% for line in tune.lyrics.lines %}
 \markup {
   \vspace #2
   \fill-line {
@@ -42,7 +42,7 @@
     \hspace #1
   }
 }
-{% if loop.index < lyrics_text.lines|length %}
+{% if loop.index < tune.lyrics.lines|length %}
 \markup {
   \vspace #1
   \fill-line {
diff --git a/folkugat_web/assets/templates/lilypond/tune_in_set.ly b/folkugat_web/assets/templates/lilypond/tune_in_set.ly
new file mode 100644
index 0000000..d03b9c8
--- /dev/null
+++ b/folkugat_web/assets/templates/lilypond/tune_in_set.ly
@@ -0,0 +1,46 @@
+\markup {
+  \vspace #2
+  \fill-line {
+    \center-column {
+      \large \bold "{{ tune.header.title | safe }}"
+      {% if tune.header.composer %}
+      "{{ tune.header.composer | safe }}"
+      {% endif %}
+    }
+  }
+}
+{% if tune.score_source is not none %}
+\score {
+  \language "english"
+  <<
+{{ tune.score_source | safe }}
+  >>
+}
+{% endif %}
+{% if tune.lyrics is not none %}
+{% for line in tune.lyrics.lines %}
+\markup {
+  \vspace #2
+  \fill-line {
+    {% for paragraph in line.paragraphs %}
+    \hspace #1
+    \center-column {
+        {% for line in paragraph.lines %}
+        \line { {{ line | safe }} }
+        {% endfor %}
+    }
+    {% endfor %}
+    \hspace #1
+  }
+}
+{% if loop.index < tune.lyrics.lines|length %}
+\markup {
+  \vspace #1
+  \fill-line {
+    \override #'(span-factor . 4/9)
+    \draw-hline
+  }
+}
+{% endif %}
+{% endfor %}
+{% endif %}
diff --git a/folkugat_web/assets/templates/lilypond/tune_set.ly b/folkugat_web/assets/templates/lilypond/tune_set.ly
new file mode 100644
index 0000000..9f113e9
--- /dev/null
+++ b/folkugat_web/assets/templates/lilypond/tune_set.ly
@@ -0,0 +1,31 @@
+{{ score_beginning }}
+\version "2.24.4"
+\book {
+  \paper {
+    top-margin = 10
+    left-margin = 15
+    right-margin = 15
+
+    scoreTitleMarkup = \markup {
+      \center-column {
+        \fontsize #3 \bold \fromproperty #'header:piece
+        \fill-line {
+          \null
+          \right-column {
+            \fromproperty #'header:composer
+          }
+        }
+      }
+    }
+  }
+
+  \header {
+    title = \markup { "{{ tune_set.title | safe }}" }
+    tagline = "Partitura generada amb LilyPond"
+    copyright = "Folkugat"
+  }
+
+  {% for tune in tune_set.tunes %}
+    {% include "lilypond/tune_in_set.ly" %}
+  {% endfor %}
+}
diff --git a/folkugat_web/dal/sql/playlists/query.py b/folkugat_web/dal/sql/playlists/query.py
index d277bbb..0b962b0 100644
--- a/folkugat_web/dal/sql/playlists/query.py
+++ b/folkugat_web/dal/sql/playlists/query.py
@@ -49,6 +49,7 @@ def get_playlist_entries(
         id, session_id, set_id, tema_id
       FROM playlists
       WHERE {filter_clause}
+      ORDER BY id ASC
     """
     with get_connection(con) as con:
         cur = con.cursor()
diff --git a/folkugat_web/dal/sql/temes/query.py b/folkugat_web/dal/sql/temes/query.py
index b2af9eb..2d15b8a 100644
--- a/folkugat_web/dal/sql/temes/query.py
+++ b/folkugat_web/dal/sql/temes/query.py
@@ -1,3 +1,5 @@
+from collections.abc import Iterable
+
 from folkugat_web.dal.sql import Connection, get_connection
 from folkugat_web.model import search as search_model
 from folkugat_web.model import temes as model
@@ -22,6 +24,21 @@ def get_tema_by_id(tema_id: int, con: Connection | None = None) -> model.Tema |
         return conversion.row_to_tema(row) if row else None
 
 
+def get_temes_by_ids(tema_ids: list[int], con: Connection | None = None) -> list[model.Tema]:
+    placeholders = ", ".join(["?" for _ in tema_ids])
+    query = f"""
+      SELECT
+        id, title, alternatives, creation_date, modification_date, hidden
+      FROM temes
+      WHERE id IN ({placeholders})
+    """
+    with get_connection(con) as con:
+        cur = con.cursor()
+        _ = cur.execute(query, tema_ids)
+        rows: Iterable[conversion.TemaRowTuple] = cur.fetchall()
+        return list(map(conversion.row_to_tema, rows))
+
+
 def evict_tema_id_to_ngrams_cache():
     global _tema_id_to_ngrams_cache
     _tema_id_to_ngrams_cache = None
diff --git a/folkugat_web/dal/sql/temes/scores.py b/folkugat_web/dal/sql/temes/scores.py
index 2918525..b74418b 100644
--- a/folkugat_web/dal/sql/temes/scores.py
+++ b/folkugat_web/dal/sql/temes/scores.py
@@ -3,8 +3,8 @@ from collections.abc import Iterable
 from typing import TypedDict
 
 from folkugat_web.dal.sql import Connection, get_connection
-from folkugat_web.model import lilypond as lilypond_model
 from folkugat_web.model import temes as model
+from folkugat_web.model.lilypond.processing import RenderError
 
 ScoreRowTuple = tuple[int, int, str, str, str, str | None, str | None, bool]
 
@@ -40,7 +40,7 @@ def row_to_score(row: ScoreRowTuple) -> model.Score:
         tema_id=row[1],
         title=row[2],
         source=row[3],
-        errors=list(map(lilypond_model.RenderError.from_dict, errors_dicts)),
+        errors=list(map(RenderError.from_dict, errors_dicts)),
         img_url=row[5],
         pdf_url=row[6],
         hidden=bool(row[7]),
diff --git a/folkugat_web/fragments/sessio.py b/folkugat_web/fragments/sessio.py
index f2de843..70cc18e 100644
--- a/folkugat_web/fragments/sessio.py
+++ b/folkugat_web/fragments/sessio.py
@@ -1,5 +1,3 @@
-from typing import Optional
-
 from fastapi import Request
 from fastapi.responses import HTMLResponse
 from folkugat_web.model.pagines import Pages
diff --git a/folkugat_web/fragments/sessions.py b/folkugat_web/fragments/sessions.py
index f8cf5a0..fc32fde 100644
--- a/folkugat_web/fragments/sessions.py
+++ b/folkugat_web/fragments/sessions.py
@@ -1,5 +1,3 @@
-from typing import Optional
-
 from fastapi import Request
 from fastapi.responses import HTMLResponse
 from folkugat_web.config import calendari as config
diff --git a/folkugat_web/fragments/temes.py b/folkugat_web/fragments/temes.py
index e977f4c..2283228 100644
--- a/folkugat_web/fragments/temes.py
+++ b/folkugat_web/fragments/temes.py
@@ -1,6 +1,6 @@
 from fastapi import Request
 from folkugat_web.model import temes as model
-from folkugat_web.model.lilypond import RenderError
+from folkugat_web.model.lilypond.processing import RenderError
 from folkugat_web.model.pagines import Pages
 from folkugat_web.services import sessions as sessions_service
 from folkugat_web.services.temes import links as links_service
diff --git a/folkugat_web/model/lilypond/__init__.py b/folkugat_web/model/lilypond/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/folkugat_web/model/lilypond.py b/folkugat_web/model/lilypond/processing.py
similarity index 70%
rename from folkugat_web/model/lilypond.py
rename to folkugat_web/model/lilypond/processing.py
index e5c56d6..0bdeeea 100644
--- a/folkugat_web/model/lilypond.py
+++ b/folkugat_web/model/lilypond/processing.py
@@ -22,18 +22,3 @@ class RenderError:
             pos=str(self.pos),
             error=self.error,
         )
-
-
-@dataclasses.dataclass
-class LyricsParagraph:
-    lines: list[str]
-
-
-@dataclasses.dataclass
-class LyricsLine:
-    paragraphs: list[LyricsParagraph]
-
-
-@dataclasses.dataclass
-class LyricsText:
-    lines: list[LyricsLine]
diff --git a/folkugat_web/model/lilypond/score.py b/folkugat_web/model/lilypond/score.py
new file mode 100644
index 0000000..99feae8
--- /dev/null
+++ b/folkugat_web/model/lilypond/score.py
@@ -0,0 +1,91 @@
+import dataclasses
+import zlib
+from typing import Self
+
+from folkugat_web.model import temes
+from folkugat_web.utils import batched
+
+
+def get_hash(*v: bytes) -> bytes:
+    return zlib.adler32(b"".join(v)).to_bytes(4)
+
+
+@dataclasses.dataclass
+class LyricsParagraph:
+    lines: list[str]
+
+    def hash(self) -> bytes:
+        return get_hash(*(get_hash(line.encode()) for line in self.lines))
+
+
+@dataclasses.dataclass
+class LyricsLine:
+    paragraphs: list[LyricsParagraph]
+
+    def hash(self) -> bytes:
+        return get_hash(*(paragraph.hash() for paragraph in self.paragraphs))
+
+
+@dataclasses.dataclass
+class LyricsText:
+    lines: list[LyricsLine]
+
+    @classmethod
+    def from_lyrics(cls, lyrics: temes.Lyrics, max_cols: int = 3) -> Self:
+        paragraphs = [
+            LyricsParagraph(lines=par_str.splitlines())
+            for par_str in lyrics.content.split("\n\n") if par_str
+        ]
+        return cls(lines=[
+            LyricsLine(paragraphs=list(line_pars))
+            for line_pars in batched(paragraphs, max_cols)
+        ])
+
+    def hash(self) -> bytes:
+        return get_hash(*(line.hash() for line in self.lines))
+
+
+@dataclasses.dataclass
+class HeaderData:
+    title: str
+    composer: str | None
+
+    @classmethod
+    def from_tema(cls, tema: temes.Tema) -> Self:
+        return cls(
+            title=tema.title,
+            composer=tema.composer() or tema.origin(),
+        )
+
+    def hash(self) -> bytes:
+        return get_hash(
+            self.title.encode(),
+            (self.composer or "").encode(),
+        )
+
+
+@dataclasses.dataclass
+class LilypondTune:
+    header: HeaderData
+    score_source: str | None
+    lyrics: LyricsText | None
+    is_unknown: bool = False
+
+    def hash(self) -> bytes:
+        return get_hash(
+            self.header.hash(),
+            (self.score_source or "").encode(),
+            self.lyrics.hash() if self.lyrics else b"",
+        )
+
+
+@dataclasses.dataclass
+class LilypondSet:
+    title: str
+    tunes: list[LilypondTune]
+
+    def hash(self) -> bytes:
+        return get_hash(
+            self.title.encode(),
+            *(tune.hash() for tune in self.tunes),
+        )
diff --git a/folkugat_web/model/playlists.py b/folkugat_web/model/playlists.py
index 5076b75..fba232f 100644
--- a/folkugat_web/model/playlists.py
+++ b/folkugat_web/model/playlists.py
@@ -51,7 +51,7 @@ class Set:
             raise ValueError("All PlaylistEntries must have the same session_id")
         return cls(
             id=set_id,
-            temes=[TemaInSet.from_playlist_entry(entry) for entry in entries],
+            temes=[TemaInSet.from_playlist_entry(entry) for entry in sorted(entries, key=lambda e: e.id or 0)],
         )
 
 
diff --git a/folkugat_web/model/temes.py b/folkugat_web/model/temes.py
index 6a561c5..1b28dcf 100644
--- a/folkugat_web/model/temes.py
+++ b/folkugat_web/model/temes.py
@@ -4,7 +4,7 @@ import enum
 import itertools
 from typing import Self
 
-from folkugat_web.model.lilypond import RenderError
+from folkugat_web.model.lilypond.processing import RenderError
 from folkugat_web.model.search import NGrams
 from folkugat_web.model.sessions import Session
 from folkugat_web.services import ngrams
diff --git a/folkugat_web/services/files.py b/folkugat_web/services/files.py
index f5a1180..55c1878 100644
--- a/folkugat_web/services/files.py
+++ b/folkugat_web/services/files.py
@@ -3,8 +3,10 @@ import os
 import re
 import uuid
 from collections.abc import Iterator
+from contextlib import asynccontextmanager
 from pathlib import Path
 
+import aiofiles
 import magic
 from fastapi import HTTPException, UploadFile
 from folkugat_web.config import db
@@ -57,8 +59,8 @@ async def store_file(tema_id: int, upload_file: UploadFile) -> str:
 
 def create_tema_filename(tema_id: int, extension: str = "") -> Path:
     filename = str(uuid.uuid4().hex) + extension
-    filedir = db.DB_FILES_DIR / str(tema_id)
-    filedir.mkdir(exist_ok=True)
+    filedir = db.DB_FILES_DIR / "tema" / str(tema_id)
+    filedir.mkdir(parents=True, exist_ok=True)
     filepath = filedir / filename
     return filepath
 
@@ -71,6 +73,18 @@ def create_tmp_filename(extension: str = "") -> Path:
     return filepath
 
 
+@asynccontextmanager
+async def tmp_file(content: str):
+    input_filename = create_tmp_filename(extension=".ly")
+    async with aiofiles.open(input_filename, "w") as f:
+        _ = await f.write(content)
+    try:
+        yield input_filename
+    finally:
+        if input_filename.exists():
+            os.remove(input_filename)
+
+
 def list_files(tema_id: str) -> list[str]:
     filedir = db.DB_FILES_DIR / str(tema_id)
     return [get_db_file_path(f) for f in filedir.iterdir()]
diff --git a/folkugat_web/services/lilypond.py b/folkugat_web/services/lilypond.py
deleted file mode 100644
index 7f7afa5..0000000
--- a/folkugat_web/services/lilypond.py
+++ /dev/null
@@ -1,89 +0,0 @@
-import asyncio
-import dataclasses
-import os
-import re
-from pathlib import Path
-from typing import Literal
-
-import aiofiles
-from folkugat_web.model.lilypond import (LyricsLine, LyricsParagraph,
-                                         LyricsText, RenderError)
-from folkugat_web.model.temes import Tema
-from folkugat_web.services import files as files_service
-from folkugat_web.templates import templates
-from folkugat_web.utils import batched
-
-SCORE_BEGINNING = "% --- SCORE BEGINNING --- %"
-
-RenderFormat = Literal["png"] | Literal["pdf"]
-
-
-def source_to_single_score(source: str, tema: Tema) -> str:
-    if tema.lyrics:
-        lyrics_text = build_lyrics(tema.lyrics[0].content)
-    else:
-        lyrics_text = None
-    print("AAAAAA")
-    print(lyrics_text)
-    print("AAAAAA")
-    return templates.get_template("lilypond/single_score.ly").render(
-        score_beginning=SCORE_BEGINNING,
-        score_source=source,
-        tema=tema,
-        lyrics_text=lyrics_text,
-    )
-
-
-async def render(source: str, fmt: RenderFormat, output_filename: Path | None = None) -> tuple[Path | None, list[RenderError]]:
-    input_filename = files_service.create_tmp_filename(extension=".ly")
-    async with aiofiles.open(input_filename, "w") as f:
-        _ = await f.write(source)
-
-    output_filename = output_filename or files_service.create_tmp_filename()
-
-    if fmt == "png":
-        proc = await asyncio.create_subprocess_exec(
-            "lilypond", "--png", "-o", output_filename, input_filename,
-            stdout=asyncio.subprocess.PIPE,
-            stderr=asyncio.subprocess.PIPE,
-        )
-    else:
-        proc = await asyncio.create_subprocess_exec(
-            "lilypond", "-o", output_filename, input_filename,
-            stdout=asyncio.subprocess.PIPE,
-            stderr=asyncio.subprocess.PIPE,
-        )
-
-    _stdout, stderr = await proc.communicate()
-
-    if proc.returncode:
-        esc_input_filename = re.escape(str(input_filename))
-        error_re = re.compile(rf"{esc_input_filename}:(?P<line>\d+):(?P<pos>\d+): error: (?P<error>.*)$")
-        error_matches = filter(None, map(error_re.match, stderr.decode("utf-8").splitlines()))
-        errors = map(lambda m: RenderError.from_dict(m.groupdict()), error_matches)
-        line_offset = source.splitlines().index(SCORE_BEGINNING) + 1
-        errors_offset = [dataclasses.replace(e, line=e.line - line_offset) for e in errors if e.line > line_offset]
-        return None, errors_offset
-
-    if fmt == "png":
-        # Check if the output generated multiple pages
-        pages = sorted(output_filename.parent.rglob(f"{output_filename.name}*.png"))
-        if len(pages) > 1:
-            output_filename = pages[0]
-            for page in pages[1:]:
-                os.remove(page)
-        else:
-            output_filename = output_filename.with_suffix(".png")
-    elif fmt == "pdf":
-        output_filename = output_filename.with_suffix(".pdf")
-
-    return output_filename, []
-
-
-def build_lyrics(text: str, max_cols: int = 3) -> LyricsText:
-    paragraphs = [LyricsParagraph(lines=par_str.splitlines()) for par_str in text.split("\n\n") if par_str]
-    print(list(batched(paragraphs, max_cols)))
-    return LyricsText(lines=[
-        LyricsLine(paragraphs=list(line_pars))
-        for line_pars in batched(paragraphs, max_cols)
-    ])
diff --git a/folkugat_web/services/lilypond/__init__.py b/folkugat_web/services/lilypond/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/folkugat_web/services/lilypond/build.py b/folkugat_web/services/lilypond/build.py
new file mode 100644
index 0000000..8bef2e6
--- /dev/null
+++ b/folkugat_web/services/lilypond/build.py
@@ -0,0 +1,102 @@
+from collections.abc import Iterable, Iterator
+
+from fastapi import HTTPException
+from folkugat_web.dal.sql.temes import scores as scores_dal
+from folkugat_web.model import playlists as playlists_model
+from folkugat_web.model import temes as model
+from folkugat_web.model.lilypond import score as lilypond_model
+from folkugat_web.services import lilypond
+from folkugat_web.services.temes import lyrics as lyrics_service
+from folkugat_web.services.temes import properties as properties_service
+from folkugat_web.services.temes import query as temes_q
+from folkugat_web.services.temes import scores as scores_service
+from folkugat_web.utils import FnChain
+
+UNKNOWN_TITLE = "Desconegut"
+
+
+def unknown_tune() -> lilypond_model.LilypondTune:
+    return lilypond_model.LilypondTune(
+        header=lilypond_model.HeaderData(
+            title=UNKNOWN_TITLE,
+            composer=None,
+        ),
+        score_source=None,
+        lyrics=None,
+        is_unknown=True,
+    )
+
+
+def tune_from_tema(tema: model.Tema | None, score_source: str | None = None) -> lilypond_model.LilypondTune:
+    """
+    The given `tema` is assumed to have properties, lyrics and scores (if source is None)
+    """
+    if tema is None:
+        return unknown_tune()
+    return lilypond_model.LilypondTune(
+        header=lilypond_model.HeaderData.from_tema(tema=tema),
+        score_source=score_source or (tema.scores[0].source if tema.scores else None),
+        lyrics=lilypond_model.LyricsText.from_lyrics(lyrics=tema.lyrics[0]) if tema.lyrics else None,
+    )
+
+
+def tunes_from_temes(temes: Iterable[model.Tema | None]) -> list[lilypond_model.LilypondTune]:
+    """
+    All `Tema` in `temes` are assumed to have properties, lyrics and scores
+    """
+    return [tune_from_tema(tema) for tema in temes]
+
+
+def tune_from_tema_id(tema_id: int, score_source: str | None = None) -> lilypond_model.LilypondTune:
+    tema = temes_q.get_tema_by_id(tema_id)
+    if not tema:
+        raise HTTPException(status_code=404, detail="Could not find tema!")
+    tema = (
+        FnChain.transform(tema) |
+        properties_service.add_properties_to_tema |
+        lyrics_service.add_lyrics_to_tema
+    ).result()
+    if score_source is None:
+        tema = scores_service.add_scores_to_tema(tema)
+    return tune_from_tema(tema=tema, score_source=score_source)
+
+
+def tunes_from_tema_ids(tema_ids: list[int]) -> list[lilypond_model.LilypondTune]:
+    temes = (
+        FnChain.transform(temes_q.get_temes_by_ids(tema_ids=tema_ids)) |
+        properties_service.add_properties_to_temes |
+        lyrics_service.add_lyrics_to_temes |
+        scores_service.add_scores_to_temes |
+        list
+    ).result()
+    return tunes_from_temes(temes=temes)
+
+
+def build_set_title(temes: list[model.Tema | None]) -> str:
+    def build_title(tema: model.Tema | None) -> str:
+        return tema.title if tema else UNKNOWN_TITLE
+    return " i ".join(filter(bool, [
+        ", ".join([build_title(tema) for tema in temes[:-1]]),
+        build_title(temes[-1])
+    ]))
+
+
+def set_from_set(set_entry: playlists_model.Set) -> lilypond_model.LilypondSet:
+    def _build_temes_by_id(temes: Iterable[model.Tema]) -> dict[int, model.Tema]:
+        return {tema.id: tema for tema in temes if tema.id is not None}
+    tema_ids = [tema_in_set.tema_id for tema_in_set in set_entry.temes]
+    temes_by_id = (
+        FnChain.transform([tema_id for tema_id in tema_ids if tema_id is not None]) |
+        temes_q.get_temes_by_ids |
+        properties_service.add_properties_to_temes |
+        lyrics_service.add_lyrics_to_temes |
+        scores_service.add_scores_to_temes |
+        _build_temes_by_id
+    ).result()
+    temes = [temes_by_id[tema_id] if tema_id is not None else None for tema_id in tema_ids]
+    set_title = build_set_title(temes=temes)
+    tunes = tunes_from_temes(temes)
+    return lilypond_model.LilypondSet(
+        title=set_title,
+        tunes=tunes
+    )
diff --git a/folkugat_web/services/lilypond/render.py b/folkugat_web/services/lilypond/render.py
new file mode 100644
index 0000000..53b369b
--- /dev/null
+++ b/folkugat_web/services/lilypond/render.py
@@ -0,0 +1,105 @@
+import asyncio
+import dataclasses
+import enum
+import re
+from pathlib import Path
+
+import aiofiles
+from folkugat_web.log import logger
+from folkugat_web.model.lilypond.processing import RenderError
+from folkugat_web.services import files as files_service
+from folkugat_web.utils import Result
+
+from .source import SCORE_BEGINNING
+
+RenderResult = Result[Path, list[RenderError]]
+
+
+class RenderOutput(enum.Enum):
+    PDF = "pdf"
+    PNG_CROPPED = "png-cropped"
+    PNG_PREVIEW = "png-preview"
+
+
+async def render(
+    source: str,
+    output: RenderOutput,
+    output_file: Path | None = None,
+) -> RenderResult:
+    async with files_service.tmp_file(content=source) as input_file:
+        return await render_file(
+            input_file=input_file,
+            output=output,
+            output_file=output_file,
+        )
+
+
+async def render_file(
+    input_file: Path,
+    output: RenderOutput,
+    output_file: Path | None = None,
+) -> RenderResult:
+    output_file = output_file or files_service.create_tmp_filename()
+    match output:
+        case RenderOutput.PDF:
+            command = [
+                "lilypond",
+                "-f", "pdf",
+                "-o", str(output_file),
+                str(input_file)
+            ]
+            output_file = output_file.with_suffix(".pdf")
+        case RenderOutput.PNG_CROPPED:
+            command = [
+                "lilypond",
+                "-f", "png",
+                "-dcrop=#t",
+                "-dno-print-pages",
+                # "-duse-paper-size-for-page=#f",
+                "-o", str(output_file),
+                str(input_file)
+            ]
+            output_file = output_file.with_suffix(".cropped.png")
+            # output_file = output_file.with_suffix(".png")
+        case RenderOutput.PNG_PREVIEW:
+            command = [
+                "lilypond",
+                "-f", "png",
+                "-dpreview=#t",
+                "-dno-print-pages",
+                "-o", str(output_file),
+                str(input_file)
+            ]
+            output_file = output_file.with_suffix(".preview.png")
+
+    proc = await asyncio.create_subprocess_exec(
+        *command,
+        stdout=asyncio.subprocess.PIPE,
+        stderr=asyncio.subprocess.PIPE,
+    )
+
+    _stdout, stderr = await proc.communicate()
+
+    if proc.returncode:
+        errors = await _build_errors(input_file=input_file, stderr=stderr)
+        return Result(error=errors)
+
+    return Result(result=output_file)
+
+
+async def _build_errors(input_file: Path, stderr: bytes) -> list[RenderError]:
+    stderr_lines = stderr.decode("utf-8").splitlines()
+    logger.warning("Lilypond errors:")
+    for line in stderr_lines:
+        logger.warning(line)
+    async with aiofiles.open(input_file, "r") as f:
+        lines = await f.readlines()
+
+    offset_mark = SCORE_BEGINNING + "\n"
+    line_offset = lines.index(offset_mark) + 1 if offset_mark in lines else 0
+    esc_input_file = re.escape(str(input_file))
+    error_re = re.compile(rf"{esc_input_file}:(?P<line>\d+):(?P<pos>\d+): error: (?P<error>.*)$")
+    error_matches = filter(None, map(error_re.match, stderr_lines))
+    errors = map(lambda m: RenderError.from_dict(m.groupdict()), error_matches)
+    errors_offset = [dataclasses.replace(e, line=e.line - line_offset) for e in errors if e.line > line_offset]
+    return errors_offset
diff --git a/folkugat_web/services/lilypond/source.py b/folkugat_web/services/lilypond/source.py
new file mode 100644
index 0000000..de7f98e
--- /dev/null
+++ b/folkugat_web/services/lilypond/source.py
@@ -0,0 +1,18 @@
+from folkugat_web.model.lilypond.score import LilypondSet, LilypondTune
+from folkugat_web.templates import templates
+
+SCORE_BEGINNING = "% --- SCORE BEGINNING --- %"
+
+
+def tune_source(tune: LilypondTune) -> str:
+    return templates.get_template("lilypond/single_tune.ly").render(
+        score_beginning=SCORE_BEGINNING,
+        tune=tune,
+    )
+
+
+def set_source(tune_set: LilypondSet) -> str:
+    return templates.get_template("lilypond/tune_set.ly").render(
+        score_beginning=SCORE_BEGINNING,
+        tune_set=tune_set,
+    )
diff --git a/folkugat_web/services/temes/query.py b/folkugat_web/services/temes/query.py
index a64e0a9..d35b15d 100644
--- a/folkugat_web/services/temes/query.py
+++ b/folkugat_web/services/temes/query.py
@@ -5,7 +5,11 @@ from folkugat_web.model import temes as model
 
 
 def get_tema_by_id(tema_id: int) -> model.Tema | None:
-    return temes_q.get_tema_by_id(tema_id)
+    return temes_q.get_tema_by_id(tema_id=tema_id)
+
+
+def get_temes_by_ids(tema_ids: list[int]) -> list[model.Tema]:
+    return temes_q.get_temes_by_ids(tema_ids=tema_ids)
 
 
 def tema_compute_stats(
diff --git a/folkugat_web/services/temes/scores.py b/folkugat_web/services/temes/scores.py
index a5567a5..fd5d56f 100644
--- a/folkugat_web/services/temes/scores.py
+++ b/folkugat_web/services/temes/scores.py
@@ -3,6 +3,7 @@ from collections.abc import Iterable, Iterator
 from fastapi import HTTPException
 from folkugat_web.dal.sql.temes import scores as scores_dal
 from folkugat_web.model import temes as model
+from folkugat_web.model.lilypond import score as lilypond_model
 from folkugat_web.services import lilypond
 from folkugat_web.services.temes import lyrics as lyrics_service
 from folkugat_web.services.temes import properties as properties_service
@@ -46,13 +47,29 @@ def create_score(tema_id: int) -> model.Score:
     return scores_dal.insert_score(score=new_score)
 
 
-def build_single_tune_full_source(tema_id: int, source: str) -> str:
-    tema = temes_q.get_tema_by_id(tema_id)
-    if not tema:
-        raise HTTPException(status_code=404, detail="Could not find tema!")
-    tema = (
-        FnChain.transform(tema) |
-        properties_service.add_properties_to_tema |
-        lyrics_service.add_lyrics_to_tema
+def build_tune_set_full_source(tema_ids: list[int]) -> str:
+    temes = (
+        FnChain.transform(temes_q.get_temes_by_ids(tema_ids=tema_ids)) |
+        properties_service.add_properties_to_temes |
+        lyrics_service.add_lyrics_to_temes |
+        add_scores_to_temes |
+        list
     ).result()
-    return lilypond.source_to_single_score(source=source, tema=tema)
+    if not temes:
+        return ""
+    set_title = " i ".join(filter(bool, [
+        ", ".join([tema.title for tema in temes[:-1]]),
+        temes[-1].title
+    ]))
+    tune_set = lilypond_model.LilypondSet(
+        title=set_title,
+        tunes=[
+            lilypond_model.LilypondTune(
+                header=lilypond_model.HeaderData.from_tema(tema=tema),
+                score_source=tema.scores[0].source if tema.scores else None,
+                lyrics=lilypond_model.LyricsText.from_lyrics(lyrics=tema.lyrics[0]) if tema.lyrics else None,
+            ) for tema in temes
+        ]
+    )
+    print("TUNE SET HASH: ", tune_set.hash().hex())
+    return lilypond.tune_set_score(tune_set=tune_set)
diff --git a/folkugat_web/utils.py b/folkugat_web/utils.py
index d69ba1c..3216bee 100644
--- a/folkugat_web/utils.py
+++ b/folkugat_web/utils.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import dataclasses
 import itertools
 from collections.abc import Callable, Iterable, Iterator
 from typing import Generic, Protocol, Self, TypeVar
@@ -55,3 +56,13 @@ def batched(iterable: Iterable[T], n: int) -> Iterator[tuple[T, ...]]:
     iterator = iter(iterable)
     while batch := tuple(itertools.islice(iterator, n)):
         yield batch
+
+
+ResultT = TypeVar("ResultT")
+ErrorT = TypeVar("ErrorT")
+
+
+@dataclasses.dataclass
+class Result(Generic[ResultT, ErrorT]):
+    result: ResultT | None = None
+    error: ErrorT | None = None