posted 01 February 2009 18:49            

what i'm looking to do is have a looper that can store, say, 4 loops with various functionality (reverse, pitch, etc)... which i hope to be able to build working off some of the stuff from the Green Tea LCK prototypes.

but, what i want to do, that i don't know how yet.. is to be able to program each pass of a loop to change slightly.. perhaps triggering some sort of slight randomization of filter or harmonic each time the loop retriggers.

any idea how to do this? i can think of maybe a couple ways, in theory.. such as somehow grabbing the start point of the loop as trigger... or, if i know the TIME of a loop i could set some sort of duration trigger on some processes.

i'd like some advice on the best way to achieve my desired effect.

thanks
taylor

posted 02 February 2009 21:05            

Have you had a look at Kyma Sound Library>Sampling>Live capture & looping.kym>Four-track looper? This one might be a good basic structure to start with.

posted 03 February 2009 11:13            

i'll try the one carla suggests.. also look for for the "status signals" (dont' know what those are, but probably will be clear when i open up Kyma)..

posted 16 February 2009 16:15            

I had a thread about it where I posted a little update to the sound http://www.symbolicsound.com/cgi-bin/forumdisplay.cgi?action=displayprivate&number=7&topic=000282

posted 19 February 2009 10:16            

I posted a couple of smalltalk / capytalk expressions in the Wiki that I designed just for such a purpose. Here is one of the expressions:

DelayedTrigger := [ :condition :delay nduration |
| reset trigger1 trigger2 |
reset := EventVariable new.
trigger1 := condition setReset: reset.
trigger2 := ((trigger1 ramp: delay s + 1 ms) eq: 1) setReset: reset.
(reset <+ ((trigger2 ramp: onduration s + 1 ms) eq: 1),
trigger2)
].

This is a block that takes three parameters and returns a capytalk trigger expression. The trigger is delayed by the amount of the :delay parameter. So, if you pass the time for one pass through your loop as the value of :delay, and if :condition is the event that starts your loop, then the DelayedTrigger expression will go off exactly at the start of the second pass of the loop. And you can similarly create triggers that go off after two iterations, three, four, etc. In fact, you can use a delayed trigger to initiate another delayed trigger, so that you can keep the trigger chain going indefinitely.

I hope that's not too confusing. The basic idea is simple: create a trigger that goes off after exactly one iteration of your loop, and use that to control some change to the sound.

hth,

posted 20 February 2009 13:26            

Where on the Tweaky is it? I think I have to see it used in context in order to understand...

Thanks!

posted 21 February 2009 18:14            

It's the last entry under the "Expressions" section of "Share". But I'm afraid there is no context given there, just the capytalk expressions for delayed and held triggers. When I get some time I'll post a sound there that uses them in some loopy stuff.