posted 31 July 2005 17:52            

enveloppe.kym

For anybody that has followed the discussion about the pen and !KeyPitch parameter, here is the follow-up.
Attached is a sound file with two sounds :

- Bad : one oscillator (interpolation turned on), freq and enveloppe smoothed, but produces distortion when amplitude is changing. This is better heard when changes are strong, but well, they can't be that strong as the enveloppe parameter is smoothed.

- Good : a Level module placed after the oscillator replaces the enveloppe modulation of the oscillator. With its Interpolation turned on, the sound is perfectly right.

I would like to know what to do in order to get rid of the Level module. Is it possible to have the same results with the Oscillator module only ?

I will continue to search ...
It is amazing to see how such a "simple" module can open a infinite fields of possibilities ...

Camille

posted 01 August 2005 11:12            

quote:

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Originally posted by SSC:
OR paste your AR or ADSR envelope generator into the Envelope field of the Oscillator and remove the "L" that is automatically appended to the end of the Sound name.

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Sorry to bother you again on this, but I think there is something important to emphasize on continuous controllers velocity.

I've tried this idea, and this works well for A and R generated parts of the enveloppe. I mean that Scale is not Interpolated and if I use "!KeyVelocity smoothed", I get those 1 kHz distortion quircks again. I guess this is because the Scale parameter is at 1 kHz control.

What I try to achieve in a simple way is to control the volume of the oscillator with the pressure of the pen. It has the same functionality as the aftertouch.

Having the Scale parameter at 1 kHz control is OK for MIDI keyboards because they send one information of velocity per key strike. For pen tablets or continuous keyboards, the problem appears because of the continuous stream of velocity.

I think there are two solutions to this question :
1. Write a twiki article that describes how to handle this problem. (I think the more functionnal approach is to put an AR followed by a Level in the Enveloppe of the Oscillator), I would love to do this, but I am not sure where to start.
2. Make the Scale parameter of the AR and ADSR modules "full rate", or maybe an option like the Interpolation of the Level module. But on this one, SSC gurus know better than me! I don't feel very confident with this option because this could suggest that Kyma is not mature, and I know I still have lots of things to learn about it. Concerning this issue, I think the question arises because those continuous controllers are a new way of playing in Kyma.

Cheers!
Camille

posted 01 August 2005 13:11            

I'm sure SSC will have a neat solution, but here's mine.

If you have Pete's DSP Modules, you can use the "SlewRateLimiter" module with a constant as its input (with your control typed in the constant's field). The SlewRateLimiter module is just like "smoothed" but it has a seperate up and down speed and works at full sample rate. You would probably have to put both the AR and the SlewRateLimiter modules in a "Product" module and then paste that "Product" module into the Envelope field of the oscilator (removing the "L").

Hope this helps ?

posted 01 August 2005 16:47            

Hi SSC

Thats a new one. Whats a level sound ? I tried Apple "B" but none was found in the prototypes, but it sounds interesting.

posted 01 August 2005 16:59            

quote:

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Originally posted by pete:
OOOHH

Hi SSC

Thats a new one. Whats a level sound ? I tried Apple "B" but none was found in the prototypes, but it sounds interesting.

Pete

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"Level" is the fundimental sound name of "Gain", "Attenuation", et al sounds within the prototype menu.