JSFX JSAdditiv

[tilr]

Polyphonic additive synthesizer



Features:

* Wavetable oscillator that reads single cycle waveforms from disk
* Additive synthesis engine that allows to modify the wave
* Wave editors for harmonics amplitude and phase
* 8 voices unison engine
* Pitch, amplitude and filter adsr

Installation

Import the following link into Reapack repositories:

https://raw.githubusercontent.com/tiagolr/tilr_jsfx/master/index.xml

[tilr]

Note on linux at least it has a bug where on init the first waveform is not loaded by default, let me know if it happens on Mac too, thanks.

[SNJUK2]

Hi. Amazing synth. I try add new waves - its work
when change harmonic or phase - on play is reset
(need add to @init ext_noinit = 1
Thanks

[SNJUK2]

If add harmonic to custom wave second add same harmonic = noise

[tilr]

Originally Posted by SNJUK2

Hi. Amazing synth. I try add new waves - its work
when change harmonic or phase - on play is reset
(need add to @init ext_noinit = 1
Thanks

Thanks, it does reset, will try and apply that fix, about your second point about noise when adding a second harmonic I cannot reproduce, maybe its the volume clipping?

[SNJUK2]

Behevior (with ext_noinit)change harmonics than touch any knob = harmonics changes (sound change!)

[SNJUK2]

"about your second point about noise when adding a second harmonic I cannot reproduce, maybe its the volume clipping?"

first add 1 harm ad many harmonics same level
second change same harm = noise

[tilr]

Originally Posted by SNJUK2

"about your second point about noise when adding a second harmonic I cannot reproduce, maybe its the volume clipping?"

first add 1 harm ad many harmonics same level
second change same harm = noise

Still cannot replay, does it happen only with that waveform? Maybe its too large for the FFT sizes (I set it to max 4096), can you drop that waveform here?

[SNJUK2]

Yes its only with this wave (i load 1 only)

[tilr]

Originally Posted by SNJUK2

Yes its only with this wave (i load 1 only)

Can you upload it here? Maybe its fixable by increasing the FFT size

[SNJUK2]

Its guiro percussion 0.5 sec long
About harmonics - in abletons operator there is user (blank) wave
and if you load any wave and change it -wave becomes user (no harm - no sound)
in additiv that behevior only with sine_1 wave, other : no harm -is sound

[tilr]

Originally Posted by SNJUK2

Its guiro percussion 0.5 sec long
About harmonics - in abletons operator there is user (blank) wave
and if you load any wave and change it -wave becomes user (no harm - no sound)
in additiv that behevior only with sine_1 wave, other : no harm -is sound

0.5 sec is probably too long for FFT 4096, if you want change the code to higher probably fixes the issue, I may patch aswell and support larger waveforms.

When clearing all harmonics still produces some sound indeed, something to fix.

EDIT: I'm going to wait a few more issues before uploading a new PR
Here is where you can change the FFT size, it will go into new PR
Line 120 change to

  window = 512 >= len ? 512
         : 1024 >= len ? 1024
         : 2048 >= len ? 2048
         : 4096 >= len ? 4096
         : 8192 >= len ? 8192
         : 16384 >= len ? 16384
         : 32768;

[mschnell]

Originally Posted by tilr

Maybe its too large for the FFT sizes (I set it to max 4096), can you drop that waveform here?

Is it based on FFT ?

Does that not introduce too much latency for live playing ?

[tilr]

Originally Posted by mschnell

Is it based on FFT ?

Does that not introduce too much latency for live playing ?

It computes only when the wave changes, so its pretty smooth. The unison is quite a CPU hog though.

[SNJUK2]

Hi.

function normalize_wave(buf, len)
local (_min, _max, i) ( 
window = 512 >= len ? 512
        : 1024 >= len ? 1024
        : 2048 >= len ? 2048
        : 4096 >= len ? 4096
        : 8192 >= len ? 8192
        : 16384 >= len ? 16384
        : 32768;
  _min = 1;
  _max = -1;
  loop(i = 0; len,
    _min = min(_min, buf[i]);
    _max = max(_max, buf[i]);
    i += 1;
  );
  loop(i = 0; len,
    buf[i] = 2 * ((buf[i] - _min) / (_max - _min)) -1;
    i += 1;
  );
);

I change that - nothing changes

[tilr]

Originally Posted by SNJUK2

Hi.

function normalize_wave(buf, len)
local (_min, _max, i) ( 
window = 512 >= len ? 512
        : 1024 >= len ? 1024
        : 2048 >= len ? 2048
        : 4096 >= len ? 4096
        : 8192 >= len ? 8192
        : 16384 >= len ? 16384
        : 32768;
  _min = 1;
  _max = -1;
  loop(i = 0; len,
    _min = min(_min, buf[i]);
    _max = max(_max, buf[i]);
    i += 1;
  );
  loop(i = 0; len,
    buf[i] = 2 * ((buf[i] - _min) / (_max - _min)) -1;
    i += 1;
  );
);

I change that - nothing changes

Hum there should be a window code on `function synthesize(buf, len)` not `function normalize_wave`, again may be easier if you upload guiro-01.wav here I'll have a look

EDIT: sorry about the wrong line number

[SNJUK2]

Ok change function synthesize(buf, len)
if change harm - nothing happens ,sound not changed

[SNJUK2]

and CPU Up x 6

[SNJUK2]

https://drive.google.com/file/d/142I...usp=drive_link
sample

[SNJUK2]

You need lfo ,becouse if use PM lfo not possible save preset
and why needed 31 bookmarks in harm/phase ?

[tilr]

Originally Posted by SNJUK2

You need lfo ,becouse if use PM lfo not possible save preset

Not sure I follow, can you translate that , saving presets works here with custom waves.

About the other issues, thanks for reporting, I'm also finding the same problem with guiro.wav, the CPU stays normal but editing the partials nothing happens, only thing I notice is that the wave is too big for FFT at 75Kb, still editing should work, will try to fix this and other issues you found. Thanks.

[tilr]

Originally Posted by SNJUK2

You need lfo ,becouse if use PM lfo not possible save preset
and why needed 31 bookmarks in harm/phase ?
and need global pitch

I understand now the lfo preset, the 31 slots for harm/phase is ceil( 1024 (FFT harmonics) / 34 (displayed harmonics) ) = 31 slots

Global pitch sure I got that request before aswell.

[SNJUK2]

about lfo - its sound design
you make sound - need lfo (for example filter cutoff
How to make lfo at cutoff and then save synth preset?
Param Modulation lfo dont saved at preset

[SNJUK2]

31 slots for harm/phase is ceil( 1024 (FFT harmonics) / 34 (displayed harmonics) ) = 31 slots
Sorry ,but i think its not user frendly

Its just my opinion. Thanks

[tilr]

Originally Posted by SNJUK2

about lfo - its sound design
you make sound - need lfo (for example filter cutoff
How to make lfo at cutoff and then save synth preset?
Param Modulation lfo dont saved at preset

Makes sense

Sorry ,but i think its not user frendly

Agree, for less harmonics would have to truncate the harmonic count, if you look at serum for example it retains all harmonics, its not as user friendly as Operator but still think its good enough.

About the other problems I'm still struggling to figure out what causes them. Guess I'll need to understand the FFT library I'm using better to be able to debug.

[tilr]

Fixed the problem with large wave files (eg. guiro-01.wav), will be uploaded next version.
The problem with no harm no sound is that there is residual harmonics in those waves it just does not show on the display, pressing ctrl+click on the harmonics removes all sound from the wave.
The third problem is when removing all harmonics except fundamental it does not produce a pure sine wave for some reason, not sure I can fix this.

[mschnell]

Originally Posted by tilr

It computes only when the wave changes,.

Perfect !

[mequaz]

But alas I'm not synth programmer 😅🤷‍♂️. Any presets any one can share for some of these synths?