Dan Halbert
3f4d9310ff
CircuitPython files: replace STATIC with static
2024-05-20 11:02:17 -04:00
Dan Halbert
950b5d09d2
guard2once -s ...
2024-05-19 20:40:44 -04:00
Dan Halbert
747b7619ea
update headers of most CircuitPython-only files
2024-05-17 14:56:28 -04:00
c92ad33a9c
synthio: allow negative amplitudes
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Previously, negative amplitudes were clamped to zero.
Now, they are allowed to range from -ALMOST_ONE to +ALMOST_ONE.
This is useful in certain circumstances, such as using synthio
to create CV-like outputs that can be positive or negative, by
using the amplitude property of the note.
2023-11-21 08:54:07 -06:00
dcooperdalrymple
55db6b7947
Added SYNTHIO_WAVEFORM_SIZE definition, renamed 'loop_...' to 'waveform_loop_...', added 'ring_waveform_loop_...` parameters, and updated docstrings.
2023-11-20 09:50:03 -06:00
dcooperdalrymple
785ef5abd2
Add loop_start and loop_end properties to synthio.Note for waveshaping and sampling capabilities.
2023-11-17 17:41:49 -06:00
774f6ac6ab
Switch to using MP_ERROR_TEXT instead of translate, globally
2023-10-30 09:49:06 +01:00
ea5bc12a07
fix getting protocol
2023-09-22 13:53:20 -05:00
Dan Halbert
d582407b06
pre-commit fixes
2023-08-14 00:59:22 -04:00
Dan Halbert
2171e67c1b
merge latest adafruit/main
2023-08-13 19:43:54 -04:00
Dan Halbert
fe0e2f13bc
wip; fix qstr processing
2023-08-10 20:06:32 -04:00
346f08f8b9
synthio: Add Synthesizer.note_state
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This enables the specific use case of checking whether a note's release
phase has ended, but is also potentially useful to implement a sort of
"voice stealing" algorithm in Python code, which can take account of
the note's envelope state as well as other factors specific to the
program.
2023-07-20 13:16:00 -05:00
a999e40935
synthio: reorganize the order of operations
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Apply envelope & panning after biquad filtering.
This may fix the weird popping problem. It also reduces the number
of operations that are done "in stereo", so it could help performance.
It also fixes a previously unnoticed problem where a ring-modulated
waveform had 2x the amplitude of an un-modulated waveform.
The test differences look large but it's because some values got changed
in the LSB after the mathematical divisions were moved around.
2023-05-31 14:22:43 -05:00
5f7998e6f2
synthio: improve rounding in biquad
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this removes a marked DC offset and may cure the 'pops' problem.
2023-05-30 13:43:06 -05:00
8a85deb1e2
synthio: shift 19 was too much for a note with amplitude 1
2023-05-30 09:26:14 -05:00
3151656f4b
synthio: more fir-filter removal; fix biquad logic errors
2023-05-30 09:24:26 -05:00
a891e149a6
synthio: Fix multichannel biquad filtering
2023-05-29 11:23:07 -05:00
51027974e5
synthio: apply biquad filters during synthesis
2023-05-29 10:53:48 -05:00
fed8d5825b
synthio: add biquad filter type & basic filter calculations
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the filter cannot be applied as yet.
2023-05-29 09:50:18 -05:00
11d8a6ec3a
synthio: rename synthesizer.lfos to .blocks
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.. since math blocks can be placed in it too (and that's useful)
2023-05-23 19:38:25 -05:00
1847c2b72a
synthio: fix, rename voct_to_hz
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todbot discovered that this function wasn't working right, and wasn't
well-named.
2023-05-23 19:38:24 -05:00
ac02a2668e
synthio: avoid exceptions inside get_buffer
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.. in case the items in lfos are not actually LFOs
2023-05-21 13:22:50 -05:00
11c110e0da
synthio: remove 'none' case from lfo_tick
2023-05-21 13:22:48 -05:00
4ff08e02eb
synthio: lfo: bugfixes & improvements
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LFO waveforms are now linearly interpolated by default, but a new
property (interpolated=False) can disable this.
The 'once' logic was improved
2023-05-21 13:22:47 -05:00
e0cfae1d05
synthio: add (untested) phase offset
2023-05-21 13:22:46 -05:00
e259f8d1ba
synthio: Move some divide-by-twos to get_buffer
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these are always h-type buffers, so let's make the "len" be the element
count, not the byte count.
2023-05-21 13:22:44 -05:00
c435c469f4
synthio: simplify block logic a bit by converting from float just once
2023-05-18 11:55:01 -05:00
391438102b
synthio: Finish implementing Math blocks
2023-05-17 16:32:20 -05:00
5de4d197a2
synthio: start generalizing LFO to Block
2023-05-17 15:05:34 -05:00
3d2db5dbe0
synthio: improve documentation, simplify synthio_lfo_obj_tick_scaled
2023-05-17 11:13:15 -05:00
d4294de62b
synthio: Allow bends of more than one octave
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up to +-12 sounds good, right?
2023-05-16 16:58:04 -05:00
0b926f8fd4
synthio: improve release/press/change
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Semi-incompatible name change: The method `release_then_press`
is now `change`. For now a compatibility alias is supported.
Everywhere a `NoteSequence` was accepted, a single note is now accepted.
So for instance, `synth.press(30)` can be written instead of requiring
``synth.press((30,))`. The same goes for `change.retrigger`, which
will accept a single LFO or a sequence.
2023-05-16 10:26:56 -05:00
e6c5e83a45
synthio: remove more dead code
2023-05-16 10:07:22 -05:00
b2c6f9b1a4
synthio: add Synthesizer.lfo, retrigger option
2023-05-16 10:07:07 -05:00
f83212314e
synthio: Add LFOs
2023-05-15 21:15:39 -05:00
f68ab9c5c2
synthio: Fix FIR filtering when audio is stereo
2023-05-12 14:00:32 -05:00
03abc623ef
synthio: note: fix assigning bend & tremolo coefficients dynamically
2023-05-12 14:00:31 -05:00
522c5a9a11
synthio: fix crash on synthesizer.press((float,))
2023-05-12 14:00:31 -05:00
585b1c23b5
synthio: Fix sweep-type pitch bends
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The accumulator saturate logic was wrong, and the sweep was never restarted
either
2023-05-11 19:13:11 -05:00
bc7feb30a5
synthio: implement FIR filtering
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A 37-tap filter worked fine on RP2040 (prop maker) at 48kHz, so
you can probably pretty much go nuts on M7.
2023-05-11 19:00:44 -05:00
62e6de8ed5
synthio: Factor out synth_note_into_buffer, start adding filter buffer
2023-05-11 18:59:05 -05:00
7845a1b13b
synthio: Add filter boolean property to Note objects
2023-05-11 17:58:09 -05:00
33fb771b76
synthio: Add filter argument to Synthesizer constructor
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as step 1/n of adding FIR filtering
2023-05-11 17:56:11 -05:00
53e13f15a3
synthio: Finish ading SWEEP_IN
2023-05-11 16:53:40 -05:00
ec30963731
synthio: fix a -Warray-parameter diagnostic
2023-05-11 10:21:56 -05:00
89080564b4
synthio: Fix release time of zero-sustain envelopes
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When there's no sustain, the release step needs to be calculated from
the attack level, not the sustain level. Otherwise, contrary to intent,
this leads to the actual release taking a loooonnngg time.
2023-05-11 10:19:48 -05:00
095e020809
synthio: Add ring modulation
2023-05-11 09:31:18 -05:00
e87e7ee54f
synthio: add stereo & Note.panning
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A note can be placed in the center (panning=0) or moved to just the left
(panning=1) or right (panning=-1) channels. Fractional panning values
place it partially in both channels.
2023-05-11 09:31:18 -05:00
1d1907b98b
synthio: Generalize vibrato into bend
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bend can be static, sweep, or vibrato
2023-05-11 09:31:07 -05:00
c031bda5dd
synthio: implement a range compressor with hard knee
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This really improves the loudness of the output with multiple notes
while being a nice simple algorithm to implement.
2023-05-08 09:22:42 -05:00
