1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
use super::TrackBuilder;
impl<'a> TrackBuilder<'a> {
/// Play a tuplet - evenly divide notes across a duration
///
/// A tuplet fits a specific number of notes into the space normally occupied
/// by a different number of beats. Each note gets equal duration.
///
/// # Arguments
/// * `notes` - The notes/frequencies to play in the tuplet
/// * `count` - Number of notes to fit (should match notes.len() for even spacing)
/// * `total_duration` - Total time span for the entire tuplet
///
/// # Example
/// ```
/// # use tunes::composition::Composition;
/// # use tunes::instruments::Instrument;
/// # use tunes::composition::timing::Tempo;
/// # use tunes::consts::notes::*;
/// # let mut comp = Composition::new(Tempo::new(120.0));
/// // Play 5 notes evenly across 1 beat (quintuplet)
/// comp.instrument("piano", &Instrument::acoustic_piano())
/// .tuplet(&[C4, D4, E4, F4, G4], 5, 1.0);
/// ```
pub fn tuplet(mut self, notes: &[f32], count: usize, total_duration: f32) -> Self {
if count == 0 || total_duration <= 0.0 || !total_duration.is_finite() {
return self;
}
let note_duration = total_duration / count as f32;
let waveform = self.waveform;
let envelope = self.envelope;
let pitch_bend = self.pitch_bend;
for &freq in notes {
let cursor = self.cursor;
self.get_track_mut()
.add_note_with_waveform_envelope_and_bend(
&[freq],
cursor,
note_duration,
waveform,
envelope,
pitch_bend,
);
let swung_duration = self.apply_swing(note_duration);
self.cursor += swung_duration;
}
self.update_section_duration();
self
}
/// Play a triplet - 3 notes in the space of 2
///
/// A triplet fits 3 evenly-spaced notes into the time normally occupied by 2 notes.
/// This is one of the most common tuplets in music.
///
/// # Arguments
/// * `notes` - The 3 notes/frequencies to play (or any number for convenience)
/// * `total_duration` - Total time span (e.g., 1.0 for a quarter note triplet)
///
/// # Example
/// ```
/// # use tunes::composition::Composition;
/// # use tunes::instruments::Instrument;
/// # use tunes::composition::timing::Tempo;
/// # use tunes::consts::notes::*;
/// # let mut comp = Composition::new(Tempo::new(120.0));
/// // Triplet over one beat
/// comp.instrument("piano", &Instrument::acoustic_piano())
/// .triplet(&[C4, E4, G4], 1.0);
/// ```
pub fn triplet(self, notes: &[f32], total_duration: f32) -> Self {
self.tuplet(notes, 3, total_duration)
}
/// Play a quintuplet - 5 notes in the space of 4
///
/// A quintuplet fits 5 evenly-spaced notes into the time normally occupied by 4 notes.
/// Common in progressive and jazz music.
///
/// # Arguments
/// * `notes` - The 5 notes/frequencies to play (or any number for convenience)
/// * `total_duration` - Total time span
///
/// # Example
/// ```
/// # use tunes::composition::Composition;
/// # use tunes::instruments::Instrument;
/// # use tunes::composition::timing::Tempo;
/// # use tunes::consts::notes::*;
/// # let mut comp = Composition::new(Tempo::new(120.0));
/// comp.instrument("drums", &Instrument::pluck())
/// .quintuplet(&[C4, D4, E4, F4, G4], 1.0);
/// ```
pub fn quintuplet(self, notes: &[f32], total_duration: f32) -> Self {
self.tuplet(notes, 5, total_duration)
}
/// Play a sextuplet - 6 notes in the space of 4
///
/// A sextuplet fits 6 evenly-spaced notes into the time normally occupied by 4 notes.
/// Equivalent to two consecutive triplets.
///
/// # Arguments
/// * `notes` - The 6 notes/frequencies to play (or any number for convenience)
/// * `total_duration` - Total time span
///
/// # Example
/// ```
/// # use tunes::composition::Composition;
/// # use tunes::instruments::Instrument;
/// # use tunes::composition::timing::Tempo;
/// # use tunes::consts::notes::*;
/// # let mut comp = Composition::new(Tempo::new(120.0));
/// comp.instrument("lead", &Instrument::synth_lead())
/// .sextuplet(&[C4, D4, E4, F4, G4, A4], 1.0);
/// ```
pub fn sextuplet(self, notes: &[f32], total_duration: f32) -> Self {
self.tuplet(notes, 6, total_duration)
}
/// Play a septuplet - 7 notes in the space of 4 (or 8)
///
/// A septuplet fits 7 evenly-spaced notes into a beat span.
/// Commonly used in metal and progressive music.
///
/// # Arguments
/// * `notes` - The 7 notes/frequencies to play (or any number for convenience)
/// * `total_duration` - Total time span
///
/// # Example
/// ```
/// # use tunes::composition::Composition;
/// # use tunes::instruments::Instrument;
/// # use tunes::composition::timing::Tempo;
/// # use tunes::consts::notes::*;
/// # let mut comp = Composition::new(Tempo::new(120.0));
/// comp.instrument("shred", &Instrument::synth_lead())
/// .septuplet(&[C4, D4, E4, F4, G4, A4, B4], 1.0);
/// ```
pub fn septuplet(self, notes: &[f32], total_duration: f32) -> Self {
self.tuplet(notes, 7, total_duration)
}
}
#[cfg(test)]
mod tests {
use crate::composition::Composition;
use crate::consts::notes::*;
use crate::composition::timing::Tempo;
use crate::track::AudioEvent;
#[test]
fn test_tuplet_divides_duration_evenly() {
let mut comp = Composition::new(Tempo::new(120.0));
comp.track("test").tuplet(&[C4, D4, E4], 3, 1.5);
let track = &comp.into_mixer().tracks()[0];
assert_eq!(track.events.len(), 3);
// Each note should have duration 1.5 / 3 = 0.5
for event in &track.events {
if let AudioEvent::Note(note) = event {
assert_eq!(note.duration, 0.5);
}
}
}
#[test]
fn test_tuplet_advances_cursor() {
let mut comp = Composition::new(Tempo::new(120.0));
let builder = comp.track("test").tuplet(&[C4, D4, E4, F4], 4, 2.0);
// 4 notes * 0.5 each = 2.0
assert!((builder.cursor - 2.0).abs() < 0.01);
}
#[test]
fn test_tuplet_with_zero_count() {
let mut comp = Composition::new(Tempo::new(120.0));
let builder = comp.track("test").tuplet(&[C4, D4], 0, 1.0);
// Should be no-op
assert_eq!(builder.cursor, 0.0);
}
#[test]
fn test_tuplet_with_zero_duration() {
let mut comp = Composition::new(Tempo::new(120.0));
let builder = comp.track("test").tuplet(&[C4, D4], 2, 0.0);
// Should be no-op
assert_eq!(builder.cursor, 0.0);
}
#[test]
fn test_tuplet_with_negative_duration() {
let mut comp = Composition::new(Tempo::new(120.0));
let builder = comp.track("test").tuplet(&[C4, D4], 2, -1.0);
// Should be no-op
assert_eq!(builder.cursor, 0.0);
}
#[test]
fn test_triplet_creates_three_notes() {
let mut comp = Composition::new(Tempo::new(120.0));
comp.track("test").triplet(&[C4, E4, G4], 1.0);
let track = &comp.into_mixer().tracks()[0];
assert_eq!(track.events.len(), 3);
// Each should be 1.0 / 3 ≈ 0.333...
for event in &track.events {
if let AudioEvent::Note(note) = event {
assert!((note.duration - 1.0 / 3.0).abs() < 0.01);
}
}
}
#[test]
fn test_triplet_timing() {
let mut comp = Composition::new(Tempo::new(120.0));
comp.track("test").triplet(&[C4, E4, G4], 1.5);
let track = &comp.into_mixer().tracks()[0];
// Notes should start at 0.0, 0.5, 1.0
if let AudioEvent::Note(note) = &track.events[0] {
assert_eq!(note.start_time, 0.0);
}
if let AudioEvent::Note(note) = &track.events[1] {
assert!((note.start_time - 0.5).abs() < 0.01);
}
if let AudioEvent::Note(note) = &track.events[2] {
assert!((note.start_time - 1.0).abs() < 0.01);
}
}
#[test]
fn test_quintuplet_creates_five_notes() {
let mut comp = Composition::new(Tempo::new(120.0));
comp.track("test").quintuplet(&[C4, D4, E4, F4, G4], 2.0);
let track = &comp.into_mixer().tracks()[0];
assert_eq!(track.events.len(), 5);
// Each should be 2.0 / 5 = 0.4
for event in &track.events {
if let AudioEvent::Note(note) = event {
assert!((note.duration - 0.4).abs() < 0.01);
}
}
}
#[test]
fn test_sextuplet_creates_six_notes() {
let mut comp = Composition::new(Tempo::new(120.0));
comp.track("test").sextuplet(&[C4, D4, E4, F4, G4, A4], 3.0);
let track = &comp.into_mixer().tracks()[0];
assert_eq!(track.events.len(), 6);
// Each should be 3.0 / 6 = 0.5
for event in &track.events {
if let AudioEvent::Note(note) = event {
assert_eq!(note.duration, 0.5);
}
}
}
#[test]
fn test_septuplet_creates_seven_notes() {
let mut comp = Composition::new(Tempo::new(120.0));
comp.track("test")
.septuplet(&[C4, D4, E4, F4, G4, A4, B4], 1.4);
let track = &comp.into_mixer().tracks()[0];
assert_eq!(track.events.len(), 7);
// Each should be 1.4 / 7 = 0.2
for event in &track.events {
if let AudioEvent::Note(note) = event {
assert!((note.duration - 0.2).abs() < 0.01);
}
}
}
#[test]
fn test_tuplet_with_more_notes_than_count() {
let mut comp = Composition::new(Tempo::new(120.0));
// 5 notes but count=3 means each gets 1.5/3 = 0.5s duration
comp.track("test").tuplet(&[C4, D4, E4, F4, G4], 3, 1.5);
let track = &comp.into_mixer().tracks()[0];
assert_eq!(track.events.len(), 5);
// All notes should have the calculated duration
for event in &track.events {
if let AudioEvent::Note(note) = event {
assert_eq!(note.duration, 0.5);
}
}
}
#[test]
fn test_tuplet_with_fewer_notes_than_count() {
let mut comp = Composition::new(Tempo::new(120.0));
// 2 notes but count=5 means each gets 2.0/5 = 0.4s duration
comp.track("test").tuplet(&[C4, D4], 5, 2.0);
let track = &comp.into_mixer().tracks()[0];
assert_eq!(track.events.len(), 2);
for event in &track.events {
if let AudioEvent::Note(note) = event {
assert!((note.duration - 0.4).abs() < 0.01);
}
}
}
#[test]
fn test_tuplet_chaining() {
let mut comp = Composition::new(Tempo::new(120.0));
comp.track("test")
.triplet(&[C4, E4, G4], 1.0)
.quintuplet(&[D4, F4, A4, C5, E5], 1.0);
let track = &comp.into_mixer().tracks()[0];
// 3 + 5 = 8 notes
assert_eq!(track.events.len(), 8);
}
#[test]
fn test_empty_notes_array() {
let mut comp = Composition::new(Tempo::new(120.0));
let builder = comp.track("test").tuplet(&[], 3, 1.0);
assert!((builder.cursor - 0.0).abs() < 0.01);
}
#[test]
fn test_tuplet_exact_timing() {
let mut comp = Composition::new(Tempo::new(120.0));
comp.track("test").tuplet(&[C4, D4, E4, F4], 4, 1.0);
let track = &comp.into_mixer().tracks()[0];
// Verify exact start times: 0, 0.25, 0.5, 0.75
if let AudioEvent::Note(note) = &track.events[0] {
assert_eq!(note.start_time, 0.0);
}
if let AudioEvent::Note(note) = &track.events[1] {
assert!((note.start_time - 0.25).abs() < 0.001);
}
if let AudioEvent::Note(note) = &track.events[2] {
assert!((note.start_time - 0.5).abs() < 0.001);
}
if let AudioEvent::Note(note) = &track.events[3] {
assert!((note.start_time - 0.75).abs() < 0.001);
}
}
#[test]
fn test_triplet_advances_cursor_correctly() {
let mut comp = Composition::new(Tempo::new(120.0));
let builder = comp.track("test").triplet(&[C4, E4, G4], 1.5);
assert!((builder.cursor - 1.5).abs() < 0.01);
}
}