Douglas Ward: > What program is suggested for replacing this toolchain? I think Csound can > accomplish this. (Can this be accomplished with Audacity+Nyquist, too? Is > there a plug-in that will play multiple frequencies at once?) Are there any > favourite command line applications that can be used to produce multiple sine > waves at once? Csound seems overly complex for this application, but I do not > know of alternatives. Is there anything other than Csound? I just want to > make sure I'm not overlooking a great specialized program before digging into > Csound. This should be in a FAQ... Theres a lot of programs that let you do this. Yes, it can be done with Nyquist or CSound. Other alternatives are pd, supercollider, clm, snd, galan, ecasound. http://twiki.org/cgi-bin/view/Wikilearn/LA_SynthesisTools But there are many others, Octave for example. For the job you want, a graphical program such as pd, galan or spiralsynthmodular might be the quickest solution. (others?) --