Gain Modulation with calculated modulation per event #1095

daslyfe · 2024-05-10T04:01:09Z

This pattern could be used as the basis for all kinds of interesting modulations.

An example:

setCps(.5)
$: s("bd:4:4!4").gain(.4)
$: s("oh!16").gain(.1).am("4").amskew(1)

$: note("{f g c d}%16".add("{12 7 0}%16")).am("<4 16 6>").amskew("<1 0 .5>").s("sawtooth").release(.1)

The timing of the modulation for the non-synced clock is a little off, and I haven't been able to figure out why yet. Maybe @felixroos you might have an idea? The synced clock timing is accurate.

felixroos · 2024-05-13T04:52:32Z

just a quick idea: maybe tremolo should be an alias of am ? (Then also pm should be an alias of vibrato)
need to dig into the rest of it soon..

daslyfe · 2024-05-13T16:30:21Z

just a quick idea: maybe tremolo should be an alias of am ? (Then also pm should be an alias of vibrato) need to dig into the rest of it soon..

Yeah that makes sense to me 👍

daslyfe · 2024-05-14T01:32:37Z

Okay this should be ready to go now. The cycle calculation jitters a bit on the non synced chromium clock but isn't very noticeableand can probably be improved with better math.

daslyfe · 2024-05-14T03:17:22Z

I updated the non synced clock to more closely match the synced clock in order to make the cps calculation more accurate on chrome. I also brought over the setCycle function that can be integrated in new features :)

felixroos · 2024-05-17T07:24:26Z

I've tested it and it works great!
It would be good to find a syntax to allow switching between absolute phase (like am) and relative phase (like all others rn). I imagine being able to apply tremolo with a relative/resetting phase could also be something desirable. It probably makes sense to make relative phase the default and add some keyword for absolute phase. Maybe something like am.lfo().
It also depends on which other effects might be suitable for absolute phase. Could this also be used for non repeating effects like envelopes?

felixroos · 2024-05-17T07:27:32Z

packages/core/cyclist.mjs

-        if (this.num_ticks_since_cps_change === 0) {
-          this.num_cycles_at_cps_change = this.lastEnd;
-          this.seconds_at_cps_change = phase;
+      (phase, duration, _, time) => {


What's the idea behind these changes? I can't quite figure out the intention by just looking at the code o_O

The cycle calculation has to be adjusted slightly to compensate for when the event is actually played so that the phase of the modulation can be lined up. I already had made the cycle calculation on the neocyclist, so I just brought that logic over as well as the setCycle function. I could not figure out how to get the cycle offset adjustment to calculate properly with current cyclist implementation. Maybe you might know a better way to get this value?

felixroos · 2024-05-17T07:30:08Z

packages/core/neocyclist.mjs

@@ -86,7 +83,7 @@ export class NeoCyclist {
            this.latency +
            this.worker_time_dif;
          const duration = hap.duration / this.cps;
-          onTrigger?.(hap, 0, duration, this.cps, targetTime);
+          onTrigger?.(hap, 0, duration, this.cps, targetTime, this.cycle);


could cycle potentially be deduced from the hap itself? something like hap.whole.begin.sam() ? not sure

That was the original plan, but the events don't line up perfectly unless you get the adjusted cycle that accounts for latency etc. Honestly could use some help here, maybe there is a better way to do this.

felixroos · 2024-05-17T07:32:24Z

packages/superdough/superdough.mjs

@@ -260,7 +260,7 @@ export function resetGlobalEffects() {
  analysersData = {};
 }

-export const superdough = async (value, t, hapDuration) => {
+export const superdough = async (value, t, hapDuration, cps, cycle) => {


could there be a default value for cycle to make am (and potential future friends) be relative to seconds? so am(4) would be 4Hz. thinking about using superdough without strudel, where cycle is a non existing concept

yeah you could just pass in the time in seconds since clock start and it should work that way. I agree having both options would be nice for different effects

felixroos · 2024-05-17T07:34:12Z

I've tested it and it works great! It would be good to find a syntax to allow switching between absolute phase (like am) and relative phase (like all others rn). I imagine being able to apply tremolo with a relative/resetting phase could also be something desirable. It probably makes sense to make relative phase the default and add some keyword for absolute phase. Maybe something like am.lfo(). It also depends on which other effects might be suitable for absolute phase. Could this also be used for non repeating effects like envelopes?

the switching between relative and absolute is probably not needed yet in this PR, just an idea for the future (tho it implies a breaking change)

felixroos · 2024-05-18T08:28:45Z

just a quick idea: maybe tremolo should be an alias of am ? (Then also pm should be an alias of vibrato) need to dig into the rest of it soon..

Yeah that makes sense to me 👍

thinking again about this, I realized there is a distinction between fm and vib:

fm is relative to the hap frequency, which allows keeping the timbre of different notes the same (fmh controls the ratio of modulator and carrier frequency)
vib uses an absolute modulator frequency, independent of the carrier frequency (typically used for lower frequency modulation)

just from a naming perspective, it might make sense for am to be frequency relative as well? The frequency independent version would probably be tremolo then? Combining this with absolute / relative phase, we have 4 variants:

	absolute frequency	relative frequency
relative phase	vib / tremolo	fm / am
absolute phase	vib.sync ? / tremolo.sync ?	fm.sync ? / am.sync ?

not sure if relative frequency + absolute phase is even needed..

daslyfe · 2024-05-18T13:55:39Z

just a quick idea: maybe tremolo should be an alias of am ? (Then also pm should be an alias of vibrato) need to dig into the rest of it soon..

Yeah that makes sense to me 👍

thinking again about this, I realized there is a distinction between fm and vib:

fm is relative to the hap frequency, which allows keeping the timbre of different notes the same (fmh controls the ratio of modulator and carrier frequency)

vib uses an absolute modulator frequency, independent of the carrier frequency (typically used for lower frequency modulation)

just from a naming perspective, it might make sense for am to be frequency relative as well? The frequency independent version would probably be tremolo then? Combining this with absolute / relative phase, we have 4 variants:

absolute frequency relative frequency
relative phase vib / tremolo fm / am
absolute phase vib.sync ? / tremolo.sync ? fm.sync ? / am.sync ?
not sure if relative frequency + absolute phase is even needed..

I think having different words for cycle based speed and frequency based might limit us when other modulations are added that don’t have similar word equivalents. I think it would be better to have something like amBasis(“<frequency cycle”) with cycle always being the default because it is much more rhythmically useful

daslyfe added 10 commits May 3, 2024 14:56

testing

496d60d

implementing

66a27a6

sine test

0d900c0

working

3159f66

memory leaking

7df663e

fix cyclist clock cycle

16472b5

fixed tri shape

6c05a4e

formatting

6a33032

Merge branch 'tidalcycles:main' into gainmod

1509ff1

fixed duplicate variable

cba9604

kinda fixed it, need to find cause of incorrect cps calculation

19df193

daslyfe added 3 commits May 13, 2024 20:42

almost figured it out

e024ae2

fixed non synced clock

c6c5a30

fix test

4ba9d47

daslyfe added 4 commits May 13, 2024 22:38

fix tests

d5ab6b7

updated non synced clock to work more like synced clock

4a181d5

remove unesseccary time call

8ad48e1

simplify targettime

bee8c81

daslyfe requested review from felixroos and yaxu May 14, 2024 03:30

felixroos reviewed May 17, 2024

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felixroos mentioned this pull request May 23, 2024

Calculate phaser modulation phase based on time #1110

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Gain Modulation with calculated modulation per event #1095

Gain Modulation with calculated modulation per event #1095

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Gain Modulation with calculated modulation per event #1095

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Gain Modulation with calculated modulation per event #1095

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