* Jeanette C. <julien@xxxxxxxxxxx> [2020-04-22 00:05]: > Apr 21 2020, Peter P. has written: > ... > > If you don't mind the loss of realtime-tweaking you could use Fons' > > convolver, or if you don't mind non-realtime processing why not have a > > look at the latest version of the fastconv binary in the composer's > > desktop project (CDP) > ... > So, do these convolvers actually support some kind of manipulation of > the loaded IRs, i.e. time stretching/compressing the IR, damping the > response in time, ...? CDP is a collection of about 150 binaries which each execute a certain sound transformation, such as filtering, time stretching, applying fade-outs etc. If you apply these in advance to the IR before you run fastconv this would give the manipulations you might be looking for. The fact that this has to be done in a step prior to convolution does not matter so much in the end, as the possibilities and parameters are so manifold that often one's brain seems the limiting factor, not the lack of realtime-processing. In fact, offline computation can also be faster than realtime. What you will not get, is a fader which you can manipulate while listening to the changes in realtime. For that you would clearly prefer Supercollider or Csound with convolution UGens or opcodes. CDP examples: Convolve two soundfiles, creating outfile.wav $ fastconv violin.wav ir.wav outfile.wav Pre-process the impulse response by applying a lowpass filter $ filter variable 3 ir.wav irLop.wav 0.1 1 500 3 selects lowpass, 0.1 is steepness, 1 is gain and 500Hz cutoff Then convolve again $ fastconv violin.wav irLop.wav outfile.wav Why not convolve a second time? $ fastconv outfile.wav irLop.wav outoutfile.wav etc. cheers, P _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
