Audio mixing

[TonyFavilla]

Hello,
I'm trying to make a little mixer/sampler, i'm using aplay to play different samples at the same time, but i'd like to adjust the volumes independently, anyone could help me?

[Stochastic]

I assume you're bash scripting? if so, try redirecting the output to a multiplier 1=full volume 0=no volume then redirecting that output to /dev/dsp

[TonyFavilla]

Yes, i'm tryng to mix C and bash scripting, thank you for the hint, but i dont know how to do that, could you be a little more detailed?

[Stochastic]

Well you'll need to build the multiplier and I don't code either bash or C so can't really help you there (it will need to do a calculation for every sample). Then the bash input/output redirection is simple aplay -someParameters > multiplierScript > /dev/dsp This is a really fun technique for accessing the soundcard as any data can be sent there (even graphics, textfiles, etc... though most will produce nasty semi-random noise).