├── LICENSE.md
├── README.md
├── edit_project_module.py
├── eval_all.py
├── eval_selected.py
├── lambdaw.py
├── loop_test.py
├── misc
├── run_musicvae.py
└── run_rave.py
├── project-module-examples
├── custom_converter.py
├── intro.py
└── live.py
├── reload.py
├── session.py
└── toggle_expression.py
/LICENSE.md:
--------------------------------------------------------------------------------
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575 | Foundation. If the Program does not specify a version number of the
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589 | 15. Disclaimer of Warranty.
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620 |
621 | END OF TERMS AND CONDITIONS
622 |
623 | How to Apply These Terms to Your New Programs
624 |
625 | If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 |
629 | To do so, attach the following notices to the program. It is safest
630 | to attach them to the start of each source file to most effectively
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633 |
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637 | This program is free software: you can redistribute it and/or modify
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640 | (at your option) any later version.
641 |
642 | This program is distributed in the hope that it will be useful,
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644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
645 | GNU General Public License for more details.
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647 | You should have received a copy of the GNU General Public License
648 | along with this program. If not, see .
649 |
650 | Also add information on how to contact you by electronic and paper mail.
651 |
652 | If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 |
655 | Copyright (C)
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657 | This is free software, and you are welcome to redistribute it
658 | under certain conditions; type `show c' for details.
659 |
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License. Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
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664 | You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 |
669 | The GNU General Public License does not permit incorporating your program
670 | into proprietary programs. If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library. If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License. But first, please read
674 | .
675 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # Lambda + DAW = LambDAW[^1]
2 |
3 | Make generative music, hack the timeline, livecode the DAW.
4 |
5 | ## What is this?
6 |
7 | LambDAW is a REAPER extension that lets you write code that generates media right in the timeline, where it happily co-exists with audio and MIDI items.
8 | This code takes the form of Python expressions, which are associated with the items they generate (_expression items_), and can refer to other items in the timeline to transform them.
9 |
10 | If this seems a bit abstract, think of how spreadsheets let you mix formulas with data: a cell can contain either, and formulas can refer to other cells, allowing you to express _relationships_ between different pieces of information. LambDAW is kind of like that, but for the digital audio workstation.
11 |
12 | 
13 |
14 | ## What's the project status?
15 |
16 | :warning: LambDAW is under heavy development. :warning:
17 |
18 | In the future, we may release an extension compatible with [ReaPack](https://reapack.com/).
19 | Until then, you can try it by cloning the repo, running `session.py` as a script in REAPER, and tweaking your setup (keybindings and theme) to make it convenient to use. You can also find a few basic examples of project modules in `project-module-examples/` which might be helpful for getting started.
20 |
21 | If you are interested it trying LambDAW, feel free to contact [the author](https://ijc8.me).
22 |
23 | [^1]: Any substrings related to lambs or other young ovines are purely coincidental, and no animals were harmed in the making of this software.
24 |
--------------------------------------------------------------------------------
/edit_project_module.py:
--------------------------------------------------------------------------------
1 | import reapy
2 | import os
3 | import subprocess
4 |
5 | path = os.path.join(reapy.Project().path, "lambdaw", "project.py")
6 | subprocess.run(["code", "-n", path])
7 |
--------------------------------------------------------------------------------
/eval_all.py:
--------------------------------------------------------------------------------
1 | import reapy
2 |
3 | reapy.set_ext_state("lambdaw", "pending", "eval_all")
4 |
--------------------------------------------------------------------------------
/eval_selected.py:
--------------------------------------------------------------------------------
1 | import reapy
2 |
3 | reapy.set_ext_state("lambdaw", "pending", "eval_selected")
4 |
--------------------------------------------------------------------------------
/lambdaw.py:
--------------------------------------------------------------------------------
1 | import array
2 | import importlib
3 | import itertools
4 | import os
5 | from pathlib import Path
6 | import sys
7 | import time
8 | import traceback
9 | import wave
10 |
11 | import reapy
12 |
13 | SAMPLE_RATE = 48000
14 |
15 | def generate_wave(path, it):
16 | # NOTE: Avoiding numpy due to segfault on reload: https://github.com/numpy/numpy/issues/11925
17 | wav = wave.open(path, "w")
18 | wav.setnchannels(1)
19 | wav.setsampwidth(2)
20 | wav.setframerate(SAMPLE_RATE)
21 | scale = 2**15 - 1
22 | audio = array.array('h', (int(max(-1, min(x, 1)) * scale) for x in it))
23 | wav.writeframes(audio)
24 | wav.close()
25 |
26 | def create_midi_source(take):
27 | # Create a new, blank MIDI source that is the length of its container.
28 | # This is weirdly complicated. See https://forum.cockos.com/showthread.php?t=100864.
29 | size = 4*1024*1024 # see reaper_python's `rpr_packs()`
30 | source = reapy.RPR.PCM_Source_CreateFromType("MIDI")
31 | reapy.RPR.SetMediaItemTake_Source(take.id, source)
32 | ticks = int(reapy.RPR.get_config_var_string("miditicksperbeat", 0, size)[2])
33 | state = reapy.RPR.GetItemStateChunk(take.item.id, 0, size, True)[2]
34 | project = reapy.Project()
35 | start = project.time_to_beats(take.item.position)
36 | end = project.time_to_beats(take.item.position + take.item.length)
37 | payload = f"""
38 |
42 | """.strip().split("\n")
43 | lines = state.split("\n")
44 | start_index = next(i for i, line in enumerate(lines) if line.startswith("", start_index + 1)
46 | lines[start_index:end_index + 1] = payload
47 | state = "\n".join(lines)
48 | reapy.RPR.SetItemStateChunk(take.item.id, state, size)
49 |
50 | def peek(iterable, default=None):
51 | it = iter(iterable)
52 | try:
53 | first = next(it)
54 | except StopIteration:
55 | return (default, ())
56 | return (first, itertools.chain((first,), it))
57 |
58 | def collect_garbage():
59 | # Delete unused lambdaw-generated audio files & reapeaks.
60 | files = {os.path.join(audio_dir, f) for f in os.listdir(audio_dir) if f.endswith(".wav")}
61 | used = set()
62 | # TODO: Maybe avoid going through all the project contents again here.
63 | # Instead, perhaps we could get this information in `scan_items` and update it appropriately in `eval_takes`.
64 | for track in reapy.Project().tracks:
65 | for item in track.items:
66 | for take in item.takes:
67 | used.add(os.path.abspath(take.source.filename))
68 | unused = files - used
69 | for file in unused:
70 | Path(file).unlink()
71 | Path(file + ".reapeaks").unlink(True)
72 |
73 | def convert_input(take: reapy.Take):
74 | take_start = take.item.position - take.start_offset
75 | def convert_note(note):
76 | infos = note.infos
77 | # TODO: Maybe use beats/PPQ instead of seconds. (The conversion is due to reapy.)
78 | infos["dur"] = infos["start"] - infos["end"]
79 | infos["start"] -= take_start
80 | infos["end"] -= take_start
81 | return infos
82 | if take.is_midi:
83 | return [convert_note(note) for note in take.notes]
84 | else:
85 | def generator():
86 | accessor = take.add_audio_accessor()
87 | length = int((accessor.end_time - accessor.start_time) * SAMPLE_RATE)
88 | chunk_size = 4096
89 | for i in range(0, length, chunk_size):
90 | chunk = accessor.get_samples(i / SAMPLE_RATE, chunk_size, sample_rate=SAMPLE_RATE)
91 | yield from chunk
92 | # TODO: Does accessor still get cleaned up if expression doesn't exhaust this generator?
93 | # I suspect not. Might need to implement __del__ on something - ideally reapy's AudioAccessor class.
94 | accessor.delete()
95 | return generator()
96 |
97 |
98 | def convert_output(output, track_index, item_index, take):
99 | def convert_note(note):
100 | # NOTE: We don't add back `take_start` here due to reapy inconsistency.
101 | if "dur" in note:
102 | del note["dur"]
103 | return note
104 | # Clear current notes
105 | while take.n_notes:
106 | take.notes[0].delete()
107 | if output is None:
108 | output = ()
109 | peeked = peek(output)
110 | first, output = peeked
111 | if isinstance(first, dict):
112 | if not take.is_midi:
113 | create_midi_source(take)
114 | for note in output:
115 | take.add_note(**convert_note(note))
116 | return False
117 | else:
118 | path = os.path.join(audio_dir, f"track{track_index}_item{item_index}_{time.monotonic_ns()}.wav")
119 | generate_wave(path, itertools.islice(output, int(take.item.length * SAMPLE_RATE)))
120 |
121 | source = reapy.RPR.PCM_Source_CreateFromFile(os.path.join(lambdaw_dir, path))
122 | old_source = take.source
123 | reapy.RPR.SetMediaItemTake_Source(take.id, source)
124 | if Path(old_source.filename).is_relative_to(audio_dir):
125 | reapy.RPR.PCM_Source_Destroy(old_source.id)
126 | return True
127 |
128 | input_converter = convert_input
129 | output_converter = convert_output
130 |
131 | def register_converters(input=None, output=None):
132 | global input_converter, output_converter
133 | if input is not None:
134 | input_converter = input
135 | if output is not None:
136 | output_converter = output
137 |
138 | def build_peaks(source):
139 | result = reapy.RPR.PCM_Source_BuildPeaks(source.id, 0)
140 | if result != 0:
141 | while (result := reapy.RPR.PCM_Source_BuildPeaks(source.id, 1)) != 0:
142 | pass
143 | reapy.RPR.PCM_Source_BuildPeaks(source.id, 2)
144 |
145 | def eval_takes(take_info):
146 | generated_audio = False
147 | for var_name, expression, track_index, item_index, take in take_info:
148 | if expression is None:
149 | continue
150 | try:
151 | # Add parenthesis to shorten common case of generator expressions.
152 | output = eval("(" + expression + ")", namespace)
153 | except:
154 | if project.is_recording:
155 | reapy.show_console_message(traceback.format_exc())
156 | else:
157 | reapy.show_message_box(traceback.format_exc(), "lambdaw expression")
158 | else:
159 | rebuild_peaks = output_converter(output, track_index, item_index, take)
160 | # Update value in namespace immediately.
161 | # reapy.print(f"EVAL: set {var_name} to {namespace[var_name]}")
162 | namespace[var_name] = input_converter(take)
163 | if rebuild_peaks:
164 | build_peaks(take.source)
165 | generated_audio |= rebuild_peaks
166 |
167 | if generated_audio:
168 | collect_garbage()
169 | reapy.update_arrange()
170 |
171 | reapy.RPR.Undo_OnStateChange2(reapy.Project().id, f"lambdaw: evaluate expressions")
172 |
173 | # Setup namespace for user code
174 | namespace = {"sr": SAMPLE_RATE}
175 |
176 | lambdaw_dir = os.path.join(reapy.Project().path, "lambdaw")
177 | audio_dir = os.path.abspath(os.path.join(lambdaw_dir, "audio"))
178 |
179 | # Make directory for generated audio clips
180 | os.makedirs(audio_dir, exist_ok=True)
181 | os.chdir(lambdaw_dir)
182 |
183 | module_path = Path("project.py")
184 | if not module_path.exists():
185 | module_path.touch()
186 |
187 | # Load user project module by path.
188 | # See https://docs.python.org/3/library/importlib.html#importing-a-source-file-directly
189 | # We need to do it this way instead of just modifying sys.path in order to
190 | # deal with having multiple "project" modules - one per Reaper project.
191 | spec = importlib.util.spec_from_file_location("project", module_path)
192 | user_project_module = importlib.util.module_from_spec(spec)
193 | sys.modules["project"] = user_project_module
194 | spec.loader.exec_module(user_project_module)
195 | exec("from project import *", namespace)
196 |
197 | def scan_items():
198 | # NOTE: Even if we're only re-evaluating a subset of items,
199 | # the namespace needs to contain all items so user code can refer to them.
200 | snippets = {}
201 | for track_index, track in enumerate(reapy.Project().tracks):
202 | for item_index, item in enumerate(track.items):
203 | take = item.active_take
204 | var_name, *expression = take.name.split("=", 1)
205 | expression = expression[0] if expression else None
206 | # Expression item: may need evaluation
207 | snippets[take.id] = (var_name, expression, track_index, item_index, take)
208 | # reapy.print(f"SCAN: set {var_name} to {namespace[var_name]}")
209 | return snippets
210 |
211 | snippets = scan_items()
212 | project = reapy.Project()
213 |
214 | counter = 0
215 |
216 | CYCLE_LENGTH = project.time_signature[1] / project.time_signature[0] * 60 # seconds
217 |
218 | # track -> take
219 | next_cycle_items = {}
220 |
221 | def is_expression_name(name):
222 | before, *after = name.split("=", 1)
223 | return after and (before == "" or before.isidentifier())
224 |
225 | def execute(pending):
226 | global counter, snippets, project, next_cycle_items
227 | if not (pending or counter > 3):
228 | # Don't check for updates every time.
229 | counter += 1
230 | return
231 | counter = 0
232 |
233 | # Check for expressions in track names (livecoding mode)
234 | # TODO: Extract to separate function
235 | new_cycle_items = set()
236 | if project.is_recording:
237 | for track in project.tracks:
238 | if is_expression_name(track.name):
239 | if track.id in next_cycle_items and next_cycle_items[track.id].name != track.name:
240 | take = next_cycle_items[track.id]
241 | reapy.RPR.GetSetMediaItemTakeInfo_String(take.id, "P_NAME", track.name, True)
242 | next_cycle_items[track.id] = take
243 | next_cycle_start = (project.play_position // CYCLE_LENGTH + 1) * CYCLE_LENGTH
244 | next_cycle_end = next_cycle_start + CYCLE_LENGTH
245 | for item in track.items:
246 | if item.position < next_cycle_end and item.position + item.length > next_cycle_start:
247 | break # found an item there already
248 | else:
249 | item = track.add_item(next_cycle_start, next_cycle_end)
250 | # Visually indicate that next cycle is pending using item lock
251 | item.set_info_value("C_LOCK", 1)
252 | take = item.add_take()
253 | reapy.RPR.GetSetMediaItemTakeInfo_String(take.id, "P_NAME", track.name, True)
254 | old_take = next_cycle_items.get(track.id, None)
255 | if old_take:
256 | old_take.item.set_info_value("C_LOCK", 0)
257 | next_cycle_items[track.id] = take
258 | new_cycle_items.add(take.id)
259 | else:
260 | for take in next_cycle_items.values():
261 | take.item.delete()
262 | next_cycle_items = {}
263 | reapy.update_arrange()
264 |
265 | old_snippets = snippets
266 | snippets = scan_items()
267 | # TODO: Only convert *last* copy with name.
268 | for id, (var_name, expression, track_index, item_index, take) in snippets.items():
269 | # Avoid reading in items newly-generated from tracks, which are empty.
270 | if id not in new_cycle_items:
271 | namespace[var_name] = input_converter(take)
272 |
273 | changed = set()
274 | for key, value in snippets.items():
275 | if key not in old_snippets or old_snippets[key][1] != value[1]:
276 | changed.add(key)
277 |
278 | # Check for new/updated expressions in take names
279 | # reapy.print("TICK")
280 | if changed or pending:
281 | # reapy.print("changed:", {id: snippets[id][0] for id in changed})
282 | filter = {
283 | "eval_all": lambda _: True,
284 | "eval_selected": lambda take: take.item.is_selected or take.id in changed,
285 | "": lambda take: take.id in changed,
286 | }[pending]
287 | eval_takes(v for v in snippets.values() if filter(v[-1]))
288 |
--------------------------------------------------------------------------------
/loop_test.py:
--------------------------------------------------------------------------------
1 | import reapy
2 |
3 | last_project, last_play_position = None, None
4 |
5 | next_take = 1
6 |
7 | def run_loop():
8 | global last_project, last_play_position, next_take
9 | p = reapy.Project()
10 | if p.time_selection.is_looping:
11 | play_position = p.play_position
12 | if last_project == p and last_play_position < p.time_selection.end and play_position < last_play_position:
13 | reapy.print("Looped!")
14 | p.selected_items[0].takes[next_take].make_active_take()
15 | next_take = 1 - next_take
16 |
17 | last_project, last_play_position = p, play_position
18 | else:
19 | last_project, last_play_position = None, None
20 |
21 | reapy.defer(run_loop)
22 |
23 | run_loop()
24 |
--------------------------------------------------------------------------------
/misc/run_musicvae.py:
--------------------------------------------------------------------------------
1 | import sys
2 |
3 | from magenta.models.music_vae import configs
4 | from magenta.models.music_vae import TrainedModel
5 |
6 | model = sys.argv[1]
7 | config = configs.CONFIG_MAP[model]
8 | checkpoint_dir_or_path = f"{model}.tar"
9 | temperature = 0.5
10 |
11 | model = TrainedModel(
12 | config, batch_size=1,
13 | checkpoint_dir_or_path=checkpoint_dir_or_path)
14 |
15 | results = model.sample(
16 | n=1,
17 | length=config.hparams.max_seq_len,
18 | temperature=temperature)
19 |
20 | print([
21 | {"pitch": note.pitch, "velocity": note.velocity, "start": note.start_time, "end": note.end_time}
22 | for note in results[0].notes
23 | ])
24 |
--------------------------------------------------------------------------------
/misc/run_rave.py:
--------------------------------------------------------------------------------
1 | import sys
2 | import wave
3 |
4 | import torch
5 | import torchaudio
6 |
7 | if len(sys.argv) < 3:
8 | print(f"usage: {sys.argv[0]}