Volume shaper /Line editor causing extra harmonics, noise ?

[lalalandsynth]

I am using this volume shaper/line editor that I found somewhere .
At this point I am using it for volume only , similar to LFO tool.

For some reason when I send a sine wave through it for testing when the envelope rises or falls it creates this raspy sound , adding harmonics , noise. I tried adding some smoothing/de zipper on the output of the envelope and yes it does help but at the same time it smoothes the envelopes. What I would like to achieve is a noise free envelope and use the smoothing for effect or to fix clicks.

Any thoughts ?

lfo test 2.jpg (41.47 KiB) Viewed 25605 times

Project posted in subsequent post.

[adamszabo]

the problem will be in the stream code not the envelope editor, you should post the full project with the problem, perhaps we can help you better then.

[Spogg]

I don't know any Ruby but this is creating a 385 element float array. How are you using this array?
Since this is in green and generated by Ruby it may well be that the timing is too slow and inaccurate or it has insuffcient steps leading to quantisation artefacts. It depends on how you're using it. It won't be fast enough to modulate audio in real time.

If you could upload what you have, to show the problem better, it would be easier to check what's happening.

Cheers

Spogg

[lalalandsynth]

Here is the project, both the 3.09 beta which I am working in and also the 3.08 save.
It makes sense that its too slow or has insufficient steps as I am am also getting pretty jagged CC output.
If I could speed this up, I should be golden...for now Any thoughts on how I can increase the resolution to be able to work with audio ?

@Spogg , yes , its coming from a float array and into a float array to poly.

float.jpg (71.74 KiB) Viewed 25595 times

There is also an error where you have to right click the editor for the envelope to appear , works ok as a vst.

LFO FOOL 3_09.fsm

(359.16 KiB) Downloaded 915 times

LFO FOOL 3_08.fsm

(361.28 KiB) Downloaded 939 times

[TheOm]

You should be using some kind of interpolation to read values from the array. Linear interpolation should be fine.

[lalalandsynth]

You should be using some kind of interpolation to read values from the array. Linear interpolation should be fine.

This is better ,I think , I can still hear the "zipping noise" when the attack is fast on the envelope .
Does not even need to be that fast , starts to sound a like a bit crusher , kind of.

You should hear it on all 4 presets in this project (the one you uploaded with different presets)

LFO FOOL 3_08-2.fsm

(349.32 KiB) Downloaded 949 times

[lalalandsynth]

This is how it measures with the interpolation, still some obvious artifacts.
I can hear less artifacts then before though, so that is progress....I think?

Not a very fast envelope 1/2 bars

Disabled, Sine played through.

Clean sine.jpg (67.33 KiB) Viewed 25587 times

Enabled , Sine plus artifacts.

dirty sine.jpg (63.21 KiB) Viewed 25587 times

And still some pretty low resolution CC output, I am assuming that is the same issue.? It even looks a bit worse.

cc.jpg (62.3 KiB) Viewed 25587 times

[lalalandsynth]

For some reason it sounds a bit better after the interpolation changes , (edit, after listening , it sounds far better, but still has artifacts) but it seems to be lower resolution , at least for the cc output ? Pre interpolation is much better for the cc ouput as far as i can tell, but still not good enough , should be much higher resolution and denser.

interpolation cc.jpg (78.86 KiB) Viewed 25585 times

Also the audio looks cleaner before the interpolation, although I can clearly hear artifacts on both.

Before Interpolation - Sine - 1/2 Bar.

Dirty sine before interpolation.jpg (58.16 KiB) Viewed 25585 times

After Interpolation - Sine - 1/2 bar.

dirty sine.jpg (63.21 KiB) Viewed 25585 times

Not convinced that did the trick, can I increase the resolution of the interpolation or is there something else I can do ?

[Spogg]

Thanks for getting the chance to have a look at this!

All you need to do now is get rid of the de-zipper from the interpolated version.

I've found that this prim doesn't work as expected if placed inline with a stream; you get crap. It's meant for de-zipping float to stream connections only, mainly for knobs.

Cheers

Spogg

[lalalandsynth]

Sweet , will try that now !

I will have to find a way to soften the envelopes or do something to get rid of clicks when processing low frequency waveforms, the de-zipper worked great for that

EDIT: TEsting in FS now , seems perfect - now onto testing in reaper with a spectrogram and analyser.

RE-Edit- Softening of the envelope is possible via the smoothing filter , so that is solved.

Thanks @theom !


Still seem to have a problem with low resolution CC output .
I did a comparison with LFO tool , and it outputs hi res /dense CC.

LFo tool fool.jpg (45.92 KiB) Viewed 25559 times

I do have to rescale the Midi CC , if I plug it into the envelope output it will output zero to max as 63-127.
So I plug it into a rescaler to make it go from 0 to 127
I wonder if the rescaling affects the resolution, although I doubt it ?
Do I need more ticks then 100 to achieve higher resolution ?
I am having a hard time finding any modules/synths in my library to see how this is done.

midi cc 2.jpg (40.59 KiB) Viewed 25559 times

Project Attached.

LFO FOOL 4.fsm

(204.94 KiB) Downloaded 931 times