On 18 June 2010 14:50, Daniel Trueman <dtrueman@princeton.edu> wrote:

awesomely twisted use of LiSa Kassen!

:-)

i don't think this is really karplus-strong though. in KP, the lowpass filter is inside the feedback loop.

Yes, of course.

for LiSa, the feedback ratio doesn't actually feed the output of all its voices back into the buffer (i'd have to think about how to implement that inside the ugen), it just retains its buffer, scaled by whatever you set the ratio to (meant to emulate what various loopers can do when loop recording). i can see, however, that it would be really useful to have it actually feedback all its voice outputs into its buffer; i'll take a look at it! maybe a second feedback mode.

It's not? WHOOOPS! I suppose that would explain why some of the more exotic modifications to KS stayed so stable :-).

I feel quite silly now. That said; this second kind of feedback would be quite easy and I see no need to put it into the UGen;

Impulse i => LiSa l => dac;

l => l; //feedback

.995 => l.gain; //feedback amplitude

1 => l.record;

stuff.etc()

Not really worth a update to LiSa, I think.

That will also mean the whole rest of the code will need a look, but I'm positive the principle is still valid. Voice 1 would need to read from the location that the last tick wrote to (for proper IIR-filtering) but that's possible, I think. I'll try to get it right later.

I should have given all this a bit more thought and testing, but as you get to say in such situations; it's the thought that counts ;-)

Yours,

Kas.