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BLIT oscllators are a bit late #7570

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Andreya-Autumn opened this issue Mar 13, 2024 · 1 comment
Open

BLIT oscllators are a bit late #7570

Andreya-Autumn opened this issue Mar 13, 2024 · 1 comment
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Breaking Change In order to close this issue we need to make a breaking change (no backwards compatibility) Bug Report Item submitted using the Bug Report template DSP Issues and feature requests related to sound generation in the synth Oscillator Features or additions to the oscillator section
Milestone
Surge XT 2.0

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@Andreya-Autumn
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Or should that be "a blit late"? :P

Anyway:
Old vs new?

Classic seems to start late by a varying amount somewhere between 40 and 80 samples, wavetable ditto by about 80-160 samples.

S&H Noise is interesting. With Correlation at max or min it behaves exactly like Classic. But with correlation at default it seems like it's accurate! As accurate as the MIDI block processing will let it that is. Maybe there's a clue there somehow?
@Andreya-Autumn Andreya-Autumn added DSP Issues and feature requests related to sound generation in the synth Bug Report Item submitted using the Bug Report template labels Mar 13, 2024
@Andreya-Autumn Andreya-Autumn added this to the Surge XT 1.3.2 milestone Mar 13, 2024
@Andreya-Autumn Andreya-Autumn changed the title BLIT oscllators are a bit late. BLIT oscllators are a bit late Mar 13, 2024
@mkruselj mkruselj added the Oscillator Features or additions to the oscillator section label Mar 13, 2024
@baconpaul
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Lemme see if I can replicate this in a regtests as a first step

baconpaul added a commit to baconpaul/surge that referenced this issue Mar 13, 2024
@baconpaul
Add a test demonstrating surge-synthesizer#7570
8b19be9 
This regtest shows exactly the problem with BLIT oscillators
with non-retrigger behavior missing the first part of the cycle.

Addresses surge-synthesizer#7570 and will be key to finding the fix.
@baconpaul baconpaul mentioned this issue Mar 13, 2024
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baconpaul added a commit that referenced this issue Mar 13, 2024
@baconpaul
Add a test demonstrating #7570 (#7571)
f52bdf8 
This regtest shows exactly the problem with BLIT oscillators
with non-retrigger behavior missing the first part of the cycle.

Addresses #7570 and will be key to finding the fix.
@mkruselj mkruselj modified the milestones: Surge XT 1.3.2, Surge XT 2.0 Mar 14, 2024
@mkruselj mkruselj added the Breaking Change In order to close this issue we need to make a breaking change (no backwards compatibility) label Mar 14, 2024
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Labels
Breaking Change In order to close this issue we need to make a breaking change (no backwards compatibility) Bug Report Item submitted using the Bug Report template DSP Issues and feature requests related to sound generation in the synth Oscillator Features or additions to the oscillator section
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Surge XT 2.0
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@mkruselj @baconpaul @Andreya-Autumn