Re: [LAU] tool to invert left channel and mix it to right

Hi! I's say ecasound or csound. For csound I have a one-step idea: vim test.orc sr = 44100 ; your samplerate kr = 4410 ; your controller rate ksmps = 10 ; sr/kr nchnls =1 ; number of output-channels instr 1 a1, a2 soundin "in.wav" a1 = a1 * -1 ; invert left channel out a1*.5 + a2*.5 ; add left and right channels with half volume endin vim test.sco i1 0 30 ; perform instrument 1 for 30 seconds csound -W -o out.wav test.orc test.sco With ecasound I can only think of a multi-step solution, which can, on the other hand be scripted: ecasound -f:16,2,44100 -i in.wav -chcopy:1,2 -f:16,1,44100 -o tmp1.wav # now its mono, I copied left channel to right, to make sure we don't get any left channel mixed in, because I'm not sure about this stereo to mono conversion. ecasound -i tmp1.wav -o tmp2.wav -ea:-110 # invert file, apply volume of -100 ecasound -f:16,2,44100 -i in.wav -chcopy:2,1 -f:16,1,44100 -o tmp3.wav # now created mono-file with only right-channel ecasound -a:1 -i tmp2.wav -ea:50 -a:2 -i tmp3.wav -ea:50 -a:all -o out.wav -z:mixmode,sum # mix inverted left to right channel. I probably did this more complicated than it could be. But this should work. Hope that helps! Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de