Jeff Epler
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
Jeff Epler
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
Jeff Epler
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
Jeff Epler
11c110e0da
synthio: remove 'none' case from lfo_tick
2023-05-21 13:22:48 -05:00
Jeff Epler
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
Jeff Epler
e0cfae1d05
synthio: add (untested) phase offset
2023-05-21 13:22:46 -05:00
Jeff Epler
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
Jeff Epler
c435c469f4
synthio: simplify block logic a bit by converting from float just once
2023-05-18 11:55:01 -05:00
Jeff Epler
391438102b
synthio: Finish implementing Math blocks
2023-05-17 16:32:20 -05:00
Jeff Epler
5de4d197a2
synthio: start generalizing LFO to Block
2023-05-17 15:05:34 -05:00
Jeff Epler
3d2db5dbe0
synthio: improve documentation, simplify synthio_lfo_obj_tick_scaled
2023-05-17 11:13:15 -05:00
Jeff Epler
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
Jeff Epler
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
Jeff Epler
e6c5e83a45
synthio: remove more dead code
2023-05-16 10:07:22 -05:00
Jeff Epler
b2c6f9b1a4
synthio: add Synthesizer.lfo, retrigger option
2023-05-16 10:07:07 -05:00
Jeff Epler
f83212314e
synthio: Add LFOs
2023-05-15 21:15:39 -05:00
Scott Shawcroft
ca01200b4f
Merge pull request #7965 from dhalbert/stm-rtc-monotonic
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STM: monotonic time even when RTC is changed
2023-05-12 13:43:13 -07:00
Scott Shawcroft
40f1ac1809
Merge pull request #7970 from dhalbert/adafruit_bus_device-no-cs
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adafruit_bus_device SPIDevice can have None for chip select
2023-05-12 13:39:42 -07:00
Dan Halbert
fe386e7c73
adafruit_bus_device SPIDevice can have None for chip select
2023-05-12 15:29:59 -04:00
Jeff Epler
f68ab9c5c2
synthio: Fix FIR filtering when audio is stereo
2023-05-12 14:00:32 -05:00
Jeff Epler
03abc623ef
synthio: note: fix assigning bend & tremolo coefficients dynamically
2023-05-12 14:00:31 -05:00
Jeff Epler
522c5a9a11
synthio: fix crash on synthesizer.press((float,))
2023-05-12 14:00:31 -05:00
Dan Halbert
e8067851f5
fix subticks handling
2023-05-12 14:39:57 -04:00
Jeff Epler
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
Jeff Epler
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
Jeff Epler
62e6de8ed5
synthio: Factor out synth_note_into_buffer, start adding filter buffer
2023-05-11 18:59:05 -05:00
Jeff Epler
7845a1b13b
synthio: Add filter boolean property to Note objects
2023-05-11 17:58:09 -05:00
Jeff Epler
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
Jeff Epler
53e13f15a3
synthio: Finish ading SWEEP_IN
2023-05-11 16:53:40 -05:00
Jeff Epler
ec30963731
synthio: fix a -Warray-parameter diagnostic
2023-05-11 10:21:56 -05:00
Jeff Epler
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
Jeff Epler
095e020809
synthio: Add ring modulation
2023-05-11 09:31:18 -05:00
Jeff Epler
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
Jeff Epler
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
Scott Shawcroft
f8cbdf88e5
Merge pull request #7947 from FoamyGuy/polygon_point_typecheck
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validate point type is tuple in vectorio Polygon
2023-05-09 09:12:17 -07:00
foamyguy
56d9798b1d
validate point type is tuple in vectorio Polygon
2023-05-08 15:39:19 -05:00
Jeff Epler
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
Jeff Epler
9a9f3229fa
synthio: Perform vibrato in pitch, not as frequency ratio
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Now the vibrato 'units' are 1.0 = one octave, 1/12 = one semitone,
1/1200 = one cent. Before, the units were somewhat arbitrary and were not
perceptually "symmetrical" around the base frequency.
For vibrato_depth = 1/12 and base frequency of 440,
before: pitch from 403.33 to 476.67Hz, not corresponding to any notes
after: pitch from 415.30 to 466.16Hz, corresponding to G# and A#
2023-05-06 21:35:20 -05:00
Jeff Epler
a53c0ed066
synthio: add onevo_to_hz, implement midi_to_hz in terms of it
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this has the side effect of making some notes more accurate, the new
frequency= value in the test is closer to the true midi frequency of
830.609...Hz.
2023-05-06 21:35:19 -05:00
Jeff Epler
d2aca7eba0
synthio: fix per-note envelope & envelope modification
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.. and simplify the envelope advance logic by handling
'instant' values more intelligently.
2023-05-04 12:23:45 -05:00
Jeff Epler
c839888e28
synthio: rename function that records error position
2023-05-04 08:45:31 -05:00
Jeff Epler
e23e7d3b3f
synthio: get_buffer: return error if object deinited
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this may fix a weird crash during shutdown
2023-05-04 07:45:45 -05:00
Jeff Epler
2b0231e9d3
synthio: re-striking a note should re-enter attack
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.. without changing the current note amplitude
2023-05-04 07:23:50 -05:00
Jeff Epler
021aaa4599
synthio: remove unused 'phase' from Note objects
2023-05-04 07:23:50 -05:00
Jeff Epler
1701552dec
synthio: make sustain level relative to attack level
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and re-vamp overall envelope calculation again.
Now, if you set a low overall attack level like 0.2 this avoids the
"diminishing volume" effect when many notes sound at once. You need
simply choose a maximum attack level that is appropriate for the max
number of voices that will actually be played.
2023-05-04 07:23:50 -05:00
Jeff Epler
c06597c07a
synthio: replace the quietest releasing note when over-writing
2023-05-04 07:23:49 -05:00
Jeff Epler
4f56b7646e
synthio: slow ramp overall envelope back up
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.. and account releasing notes at their sustain level until they're
done.
this ameliorates the effect where multiple releasing notes
don't seem to actually be releasing, but stay at a constant volume.
2023-05-04 07:23:49 -05:00
Jeff Epler
a7da245ad0
synthio: Add synthio.Note
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This class allows much more expressive sound synthesis:
* tremolo & vibrato
* arbitrary frequency
* different evelope & waveform per note
* all properties dynamically settable from Python code
2023-05-04 07:23:49 -05:00
Jeff Epler
5514e3065d
synthio: add midi_to_hz
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to convert notes in the MIDI 1-127 note scale to floating point Hz
2023-05-04 07:23:48 -05:00
Jeff Epler
bd9aca2526
Merge pull request #7862 from jepler/synthio-envelope
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Synthio envelope
2023-05-03 12:42:56 -05:00
