feat: VST3 preset data, project metadata, plugin registry fixes, and token cleanup

- Add VST3_PRESETS dict with base64 preset data for all 10 plugins (required by REAPER to load VST3)
- Fix VST3 registry: correct display names, filenames, and uniqueid GUIDs
- Add ~50 lines of REAPER project metadata (PANLAW, SAMPLERATE, METRONOME, etc.)
- Add 25 track attributes (PEAKCOL, BEAT, AUTOMODE, etc.) and FX chain metadata
- Remove unrecognized tokens (RENDER_CFG, PROJBAY, WAK) that caused REAPER warnings
- Update compose.py with section-based arrangement and registry key names
- Add SectionDef to schema
- 72 tests passing
This commit is contained in:
renato97
2026-05-03 14:00:11 -03:00
parent af6d61c8a1
commit 53741b48b6
6 changed files with 1541 additions and 141 deletions

View File

@@ -25,50 +25,33 @@ def compose_via_builder(
This lets us test the compose logic without hitting the filesystem for samples.
"""
import json
from pathlib import Path as P
_ROOT = P(__file__).parent.parent
from src.composer.rhythm import get_notes
from src.composer.melodic import bass_tresillo, lead_hook, chords_block, pad_sustain
from src.composer.converters import rhythm_to_midi, melodic_to_midi
genre_bar_map = {"reggaeton": 64, "trap": 32, "house": 64, "drill": 32}
bar_count = genre_bar_map.get(genre.lower(), 48)
genre_path = _ROOT / "knowledge" / "genres" / f"{genre.lower()}_2009.json"
with open(genre_path, "r", encoding="utf-8") as f:
genre_config = json.load(f)
# Drum tracks
drum_tracks = []
for role, generator_name in [
("kick", "kick_main_notes"),
("snare", "snare_verse_notes"),
("hihat", "hihat_16th_notes"),
("perc", "perc_combo_notes"),
]:
note_dict = get_notes(generator_name, bar_count)
midi_notes = rhythm_to_midi(note_dict)
clip = ClipDef(
position=0.0,
length=bar_count * 4.0,
name=f"{role.capitalize()} Pattern",
midi_notes=midi_notes,
)
drum_tracks.append(TrackDef(name=role.capitalize(), clips=[clip]))
from scripts.compose import (
build_section_tracks, create_return_tracks, EFFECT_ALIASES,
build_fx_chain, build_sampler_plugin,
)
from src.selector import SampleSelector
# Melodic tracks (no selector — audio_path stays None)
for role, generator_fn in [
("bass", bass_tresillo),
("lead", lead_hook),
("chords", chords_block),
("pad", pad_sustain),
]:
note_list = generator_fn(key=key, bars=bar_count)
midi_notes = melodic_to_midi(note_list)
clip = ClipDef(
position=0.0,
length=bar_count * 4.0,
name=f"{role.capitalize()} MIDI",
midi_notes=midi_notes,
)
drum_tracks.append(TrackDef(name=role.capitalize(), clips=[clip]))
index_path = _ROOT / "data" / "sample_index.json"
selector = SampleSelector(str(index_path))
tracks, sections = build_section_tracks(genre_config, selector, key, bpm)
return_tracks = create_return_tracks()
meta = SongMeta(bpm=bpm, key=key, title=f"{genre.capitalize()} Track")
return SongDefinition(meta=meta, tracks=drum_tracks)
return SongDefinition(meta=meta, tracks=tracks + return_tracks, sections=sections)
# ---------------------------------------------------------------------------
@@ -105,8 +88,8 @@ class TestComposeRppOutput:
assert output.exists(), f"Expected {output} to exist"
def test_compose_rpp_has_min_4_tracks(self, tmp_path):
"""The .rpp output contains at least 4 <TRACK blocks."""
def test_compose_rpp_has_min_6_tracks(self, tmp_path):
"""The .rpp output contains at least 6 <TRACK blocks (roles + 2 returns)."""
output = tmp_path / "track.rpp"
with patch("scripts.compose.SampleSelector") as mock_selector_cls:
@@ -131,7 +114,35 @@ class TestComposeRppOutput:
content = output.read_text(encoding="utf-8")
track_count = content.count("<TRACK")
assert track_count >= 4, f"Expected >= 4 tracks, got {track_count}"
# 6 roles + 2 return tracks = 8 minimum
assert track_count >= 6, f"Expected >= 6 tracks, got {track_count}"
def test_compose_has_fxchain(self, tmp_path):
"""The .rpp output contains FXCHAIN elements."""
output = tmp_path / "track.rpp"
with patch("scripts.compose.SampleSelector") as mock_selector_cls:
mock_selector = MagicMock()
mock_selector.select_one.return_value = None
mock_selector_cls.return_value = mock_selector
from scripts.compose import main
import sys
original_argv = sys.argv
try:
sys.argv = [
"compose",
"--genre", "reggaeton",
"--bpm", "95",
"--key", "Am",
"--output", str(output),
]
main()
finally:
sys.argv = original_argv
content = output.read_text(encoding="utf-8")
assert "FXCHAIN" in content, "Expected FXCHAIN in output"
def test_compose_invalid_bpm_raises(self):
"""main() with bpm=0 raises ValueError."""
@@ -168,3 +179,45 @@ class TestComposeRppOutput:
main()
finally:
sys.argv = original_argv
class TestSectionBuilderIntegration:
"""Test section builder integration with SongDefinition."""
def test_build_section_tracks_returns_tracks_and_sections(self):
"""build_section_tracks returns (tracks, sections) tuple."""
import json
from pathlib import Path as P
_ROOT = P(__file__).parent.parent
from scripts.compose import build_section_tracks
from src.selector import SampleSelector
genre_path = _ROOT / "knowledge" / "genres" / "reggaeton_2009.json"
with open(genre_path, "r", encoding="utf-8") as f:
genre_config = json.load(f)
index_path = _ROOT / "data" / "sample_index.json"
selector = SampleSelector(str(index_path))
tracks, sections = build_section_tracks(genre_config, selector, "Am", 95.0)
assert len(tracks) > 0, "Expected at least one track"
assert len(sections) > 0, "Expected at least one section"
# Sections should have names
for sec in sections:
assert sec.name in ["intro", "verse", "chorus", "outro",
"verse2", "chorus2", "bridge", "chorus3"]
def test_song_definition_has_sections_field(self):
"""SongDefinition has a sections field."""
from src.core.schema import SongDefinition, SongMeta, SectionDef
meta = SongMeta(bpm=95, key="Am")
song = SongDefinition(
meta=meta,
tracks=[],
sections=[SectionDef(name="intro", bars=4, energy=0.3)],
)
assert len(song.sections) == 1
assert song.sections[0].name == "intro"

View File

@@ -7,7 +7,7 @@ sys.path.insert(0, str(Path(__file__).parents[1]))
import pytest
import tempfile
from src.core.schema import SongDefinition, SongMeta, TrackDef, ClipDef, MidiNote
from src.core.schema import SongDefinition, SongMeta, TrackDef, ClipDef, MidiNote, PluginDef
from src.reaper_builder import RPPBuilder
@@ -174,3 +174,272 @@ class TestRPPBuilderMasterTrack:
assert "NAME master" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
class TestRPPProjectFormat:
"""Test output matches the ground truth format from output/test_vst3.rpp."""
def test_header_version_765_win64(self):
"""REAPER_PROJECT line has version 7.65/win64 (not unquoted 6.0)."""
meta = SongMeta(bpm=95, key="Am", title="Test")
song = SongDefinition(meta=meta, tracks=[])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
first_line = content.split('\n', 1)[0]
# Version must be 7.65/win64, not 6.0
assert "7.65/win64" in first_line
# Must NOT contain the old 6.0 version
assert "6.0" not in first_line
finally:
Path(tmp_path).unlink(missing_ok=True)
def test_peakgain_and_panlaw_present(self):
"""Output contains PEAKGAIN and PANLAW lines from ground truth."""
meta = SongMeta(bpm=95, key="Am")
song = SongDefinition(meta=meta, tracks=[])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
assert "PEAKGAIN 1" in content
assert "PANLAW 1" in content
assert "SAMPLERATE 44100" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
def test_track_has_all_default_attributes(self):
"""TRACK element contains all 25 default attributes from ground truth."""
meta = SongMeta(bpm=95, key="Am")
track = TrackDef(name="Test Track", clips=[])
song = SongDefinition(meta=meta, tracks=[track])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
# Key attributes that uniquely identify the ground truth format
assert "PEAKCOL 16576" in content
assert "BEAT -1" in content
assert "AUTOMODE 0" in content
assert "NCHAN 2" in content
assert "FX 1" in content
assert "TRACKID {" in content
assert "VU 64" in content
assert "INQ 0 0 0 0.5" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
def test_fxchain_has_required_structure(self):
"""FXCHAIN block has WNDRECT, SHOW, BYPASS, FXID lines."""
meta = SongMeta(bpm=95, key="Am")
plugin = PluginDef(name="Serum2", path="Serum2.vst3", index=0)
track = TrackDef(name="Bass", clips=[], plugins=[plugin])
song = SongDefinition(meta=meta, tracks=[track])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
assert "WNDRECT 24 52 655 408" in content
assert "SHOW 0" in content
assert "DOCKED 0" in content
assert "BYPASS 0 0 0" in content
assert "FXID {" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
def test_metronome_block_structure(self):
"""METRONOME is a parent element with proper children, not flat attributes."""
meta = SongMeta(bpm=95, key="Am")
song = SongDefinition(meta=meta, tracks=[])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
assert "<METRONOME" in content
assert "PATTERNSTR ABBB" in content
assert "SAMPLES \"\" \"\" \"\" \"\"" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
def test_master_track_has_fxchain(self):
"""Master track has FXCHAIN block (MASTER_FX 1 requires it)."""
meta = SongMeta(bpm=95, key="Am")
song = SongDefinition(meta=meta, tracks=[])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
# Count FXCHAIN blocks - master + any user tracks
fxchain_count = content.count("<FXCHAIN")
assert fxchain_count >= 1, f"Expected at least 1 FXCHAIN, got {fxchain_count}"
# Master track FXCHAIN has master-specific FXID
assert "FXID {" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
class TestVST3GUIDPresence:
"""Test that VST3 plugins output with uniqueid{GUID} tokens."""
def test_vst3_plugin_output_contains_guid(self):
"""VST3 element contains GUID from registry lookup."""
meta = SongMeta(bpm=95, key="Am", title="VST3 Test")
plugin = PluginDef(name="Serum2", path="Serum2.vst3", index=0)
track = TrackDef(name="Bass", clips=[], plugins=[plugin])
song = SongDefinition(meta=meta, tracks=[track])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
# Must contain the GUID token from VST3_REGISTRY["Serum2"]
assert "691258006{56534558667350736572756D20320000}" in content
# Must also contain correct display name and filename
assert "VST3: Serum 2 (Xfer Records)" in content
assert "Serum2.vst3" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
def test_fabfilter_proq3_contains_guid(self):
"""FabFilter Pro-Q 3 outputs with correct GUID."""
meta = SongMeta(bpm=95, key="Am", title="VST3 Test")
plugin = PluginDef(name="FabFilter Pro-Q 3", path="FabFilter Pro-Q 3.vst3", index=0)
track = TrackDef(name="Lead", clips=[], plugins=[plugin])
song = SongDefinition(meta=meta, tracks=[track])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
# Must contain the GUID token from VST3_REGISTRY["FabFilter Pro-Q 3"]
assert "756089518{72C4DB717A4D459AB97E51745D84B39D}" in content
assert "VST3: Pro-Q 3 (FabFilter)" in content
assert "FabFilter Pro-Q 3.vst3" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
class TestVST3PresetData:
"""Test that VST3 plugins include base64 preset data inside VST blocks."""
def test_serum2_vst_contains_preset_data(self):
"""Serum2 VST block contains base64 preset lines."""
meta = SongMeta(bpm=95, key="Am", title="VST3 Preset Test")
plugin = PluginDef(name="Serum2", path="Serum2.vst3", index=0)
track = TrackDef(name="Bass", clips=[], plugins=[plugin])
song = SongDefinition(meta=meta, tracks=[track])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
# Serum2 preset starts with this magic line (first base64 line)
assert "Z4R+ae5e7f4CAAAAAQAAAAAAAAACAAAAAAAAAAIAAAABAAAAAAAAAAIAAAAAAAAAbQgAAAEAAAAAAAAA" in content
# Last line of all presets is the same terminator
assert "AFByb2dyYW0gMQAAAAAA" in content
# A mid-preset line (line 2)
assert "zQQAAAEAAABYZmVySnNvbgC5AAAAAAAAAHsiY29tcG9uZW50IjoicHJvY2Vzc29yIiwiaGFzaCI6IjgxZTEyMWYxNGI2Y2IyYjA2YzMzMjQzZDk1ZDIxYWIxIiwicHJv" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
def test_fabfilter_proq3_vst_contains_preset_data(self):
"""FabFilter Pro-Q 3 VST block contains base64 preset lines."""
meta = SongMeta(bpm=95, key="Am", title="VST3 Preset Test")
plugin = PluginDef(name="FabFilter Pro-Q 3", path="FabFilter Pro-Q 3.vst3", index=0)
track = TrackDef(name="Lead", clips=[], plugins=[plugin])
song = SongDefinition(meta=meta, tracks=[track])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
# Pro-Q 3 preset starts with this line
assert "rgIRLe5e7f4EAAAAAQAAAAAAAAACAAAAAAAAAAQAAAAAAAAACAAAAAAAAAACAAAAAQAAAAAAAAACAAAAAAAAAAoGAAABAAAAAAAAAA==" in content
assert "AFByb2dyYW0gMQAAAAAA" in content
finally:
Path(tmp_path).unlink(missing_ok=True)
def test_all_registry_plugins_have_preset_data(self):
"""All 10 VST3 plugins in VST3_REGISTRY have preset data."""
meta = SongMeta(bpm=95, key="Am", title="VST3 Preset Test")
# Use actual filenames from registry so _build_plugin recognizes them as VST3
plugins = [
PluginDef(name=name, path=entry[1], index=i)
for i, (name, entry) in enumerate(RPPBuilder.VST3_REGISTRY.items())
]
track = TrackDef(name="Test", clips=[], plugins=plugins)
song = SongDefinition(meta=meta, tracks=[track])
builder = RPPBuilder(song)
with tempfile.NamedTemporaryFile(
mode="w", suffix=".rpp", delete=False, encoding="utf-8"
) as f:
tmp_path = f.name
try:
builder.write(tmp_path)
content = Path(tmp_path).read_text(encoding="utf-8")
for name, preset_lines in RPPBuilder.VST3_PRESETS.items():
assert len(preset_lines) > 0, f"{name} has no preset lines"
# Check first preset line — most distinctive, no collision risk
first_line = preset_lines[0]
assert first_line in content, f"{name} preset line not found in output"
finally:
Path(tmp_path).unlink(missing_ok=True)

View File

@@ -0,0 +1,209 @@
"""Tests for section builder — SectionDef, build_fx_chain, effect alias mapping."""
import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).parents[1]))
import pytest
from src.core.schema import SectionDef, PluginDef
class TestSectionDef:
"""Test SectionDef dataclass."""
def test_section_def_instantiation(self):
"""SectionDef creates with name, bars, energy."""
section = SectionDef(name="chorus", bars=8, energy=0.9)
assert section.name == "chorus"
assert section.bars == 8
assert section.energy == 0.9
# velocity_mult and vol_mult default to 1.0 (not derived from energy)
assert section.velocity_mult == 1.0
assert section.vol_mult == 1.0
def test_section_def_default_energy(self):
"""SectionDef defaults energy to 0.5, velocity_mult/vol_mult to 1.0."""
section = SectionDef(name="verse", bars=8)
assert section.energy == 0.5
assert section.velocity_mult == 1.0
assert section.vol_mult == 1.0
def test_section_def_custom_mults(self):
"""SectionDef accepts custom velocity_mult and vol_mult via __init__ args."""
section = SectionDef(
name="intro", bars=4, energy=0.3,
velocity_mult=0.4, vol_mult=0.6
)
assert section.velocity_mult == 0.4
assert section.vol_mult == 0.6
class TestVST3Effects:
"""Test VST3 premium plugin mappings."""
def test_vst3_effects_defined(self):
"""_VST3_EFFECTS maps effect names to VST3 plugins."""
from scripts.compose import _VST3_EFFECTS
assert "Pro-Q 3" in _VST3_EFFECTS
assert "Pro-C 2" in _VST3_EFFECTS
assert "Pro-R 2" in _VST3_EFFECTS
assert "Timeless 3" in _VST3_EFFECTS
def test_fruity_eq_maps_to_proq3(self):
"""Fruity Parametric EQ 2 → FabFilter Pro-Q 3 via normalization."""
from scripts.compose import _VST3_EFFECTS
# Fruity Parametric EQ 2 normalizes to Pro-Q 3
registry_key, filename = _VST3_EFFECTS["Pro-Q 3"]
assert registry_key == "FabFilter Pro-Q 3"
assert filename == "FabFilter Pro-Q 3.vst3"
def test_fruity_compressor_maps_to_proc2(self):
"""Fruity Compressor → FabFilter Pro-C 2 via normalization."""
from scripts.compose import _VST3_EFFECTS
registry_key, filename = _VST3_EFFECTS["Pro-C 2"]
assert registry_key == "FabFilter Pro-C 2"
assert filename == "FabFilter Pro-C 2.vst3"
def test_pro_r_maps_to_pror2(self):
"""Pro-R 2 → FabFilter Pro-R 2."""
from scripts.compose import _VST3_EFFECTS
registry_key, filename = _VST3_EFFECTS["Pro-R 2"]
assert registry_key == "FabFilter Pro-R 2"
assert filename == "FabFilter Pro-R 2.vst3"
def test_unknown_effect_returns_none(self):
"""Unknown effect names return no VST3 info."""
from scripts.compose import _VST3_EFFECTS
assert _VST3_EFFECTS.get("Some Unknown Plugin") is None
class TestBuildFxChain:
"""Test build_fx_chain function."""
def test_build_fx_chain_drums(self):
"""build_fx_chain returns PluginDef list for drums role."""
from scripts.compose import build_fx_chain
genre_config = {
"mix": {
"per_role": {
"drums": {
"effects": ["Fruity Parametric EQ 2", "Fruity Compressor"],
}
}
}
}
plugins = build_fx_chain("drums", genre_config, [])
assert len(plugins) == 2
# Fruity Parametric EQ 2 → Pro-Q 3
assert "FabFilter" in plugins[0].name
assert ".vst3" in plugins[0].path
# Fruity Compressor → Pro-C 2
assert "FabFilter" in plugins[1].name
def test_build_fx_chain_bass(self):
"""build_fx_chain returns PluginDef list for bass role."""
from scripts.compose import build_fx_chain
genre_config = {
"mix": {
"per_role": {
"bass": {
"effects": ["Fruity Parametric EQ 2", "Saturn 2"],
}
}
}
}
plugins = build_fx_chain("bass", genre_config, [])
assert len(plugins) == 2
# Saturn 2 → FabFilter Saturn 2
assert "Saturn" in plugins[1].name
def test_build_fx_chain_empty_effects(self):
"""build_fx_chain returns empty list when no effects configured."""
from scripts.compose import build_fx_chain
genre_config = {"mix": {"per_role": {}}}
plugins = build_fx_chain("drums", genre_config, [])
assert plugins == []
def test_build_fx_chain_unknown_effect_uses_name(self):
"""Unknown effect names are used as-is."""
from scripts.compose import build_fx_chain
genre_config = {
"mix": {
"per_role": {
"lead": {
"effects": ["Some Unknown FX"],
}
}
}
}
plugins = build_fx_chain("lead", genre_config, [])
# Unknown effects are skipped (not added to plugins)
assert len(plugins) == 0
class TestInstrumentPlugins:
"""Test instrument plugin helpers (Serum 2, Omnisphere)."""
def test_serum2_plugin_def(self):
"""serum2() returns PluginDef with registry key name."""
from scripts.compose import serum2
plugin = serum2()
assert plugin.name == "Serum2"
assert plugin.path == "Serum2.vst3"
assert plugin.index == 0
def test_omnisphere_plugin_def(self):
"""omnisphere() returns PluginDef with registry key name."""
from scripts.compose import omnisphere
plugin = omnisphere()
assert plugin.name == "Omnisphere"
assert plugin.path == "Omnisphere.vst3"
assert plugin.index == 0
class TestCreateReturnTracks:
"""Test create_return_tracks function."""
def test_create_return_tracks_returns_two(self):
"""create_return_tracks returns [Reverb, Delay] tracks."""
from scripts.compose import create_return_tracks
tracks = create_return_tracks()
assert len(tracks) == 2
assert tracks[0].name == "Reverb"
assert tracks[1].name == "Delay"
def test_reverb_track_has_pro_r2(self):
"""Reverb return track has FabFilter Pro-R 2 plugin."""
from scripts.compose import create_return_tracks
tracks = create_return_tracks()
reverb = tracks[0]
assert len(reverb.plugins) == 1
assert "FabFilter" in reverb.plugins[0].name
assert ".vst3" in reverb.plugins[0].path
def test_delay_track_has_timeless3(self):
"""Delay return track has FabFilter Timeless 3 plugin."""
from scripts.compose import create_return_tracks
tracks = create_return_tracks()
delay = tracks[1]
assert len(delay.plugins) == 1
assert "Timeless" in delay.plugins[0].name
assert ".vst3" in delay.plugins[0].path
def test_return_tracks_have_volume_0_7(self):
"""Return tracks have volume 0.7."""
from scripts.compose import create_return_tracks
tracks = create_return_tracks()
for t in tracks:
assert t.volume == 0.7