Sounds like a fun project, would love to see some results after you're done. atleast that's the way it was back in H6 (last time i did audio driven works in houdini.) if this is being tried out on linux, you will prob need to convert the. turn on the audio in your audio panel and set it to time line. since this is effectively compressing and stretching the audio wave, you will get pitch alteration as well. append it after your cycle and put your fetched rev channel in to the second input. but the generated channels should still be good and useful.īut i don't think that's gonna work for you since the whole point of this is to get some audio feedback while things are doing what they do. it seems that it can only playback a single unanimated value. however, whether you export another chop to it, reference another channel, or simply animate it, you won't hear the sound reacting in realtime. there's even a pitch tab with a very easy octave parameter if you want to keep it simple. you can change the pitch or adjust sound properties with the parametric eq chop (there are others, but you will get most level of control in there). just continue the cycle afterwards for how ever long you want the thing to play out.default settings should work. i wouldn't worry about any cycles before, since i'm assuming the audio file begins at frame 1.

don't know what problems you might be having with the cycle chop, but it should work fine. Ive been trying the cycle chop like the help says but i just get the screwed up result like below - i cant replicate the results of the tutorial in the help either (below is using the same settings) Ive imported the sound sample into chops with a file chop and imported the $engine_rev channel with a fetch chop. and again if $engine_revs is zero then no sound. as the $engine_revs increase i want the speed/pitch of the sound to also change. Im trying to now do the same thing with a loopable sound sample - about 1 second of an engine idling. I dont know if this is well rigged (its using expressions outside chops) but it look like it will do the job. most importantly if the revs are 0 then the exhaust and shaking are therefore also zero (because they get multiplied).

if $engine_revs is high then the shaking and exhaust emissions are high. by multiplying the particle emissions and bike shaking amounts by the $engine_revs it affects their output. i have a slider in the motorbike HDA lets call it $engine_revs which controls 2 things: the amount the bike shakes, and the emissions from the exhaust (particles).

This is a chops question but let me outline the situation.

Loop audio after effects