Just got me thinking of LADSPA sequencers... Can you open files in a LADSPA plugin? I don't know if this is even remotely feasable, but I remember a tracker from ages ago (I can't remember if it was in linux, could have been dos) that was entirely command line driven and just read plain text files for the tracker sequences. A LADSPA tracker may be stretching the "simple" factor slightly, but it would be a fun project (and ahem, SSM needs a tracker badly!) dave

On Tue, 12 Nov 2002, Mario Lang wrote: A bit complicated, but possible: ecasound -b:128 -f:16,2,44100 \ -a:generator -i null -o null -el:analogueOsc,1,5,0.5,0.5 -eS:1 \ -a:target -i foo.wav -o alsa -el:pitchScale,1.0 -ksv:1,0.5,2,1,1 -c - analogueOsc generates audio data (5Hz sine wave, warmth=0.5, instability=0.5) to the otherwise silent 'generator' chain - -eS:1 stores the passing audio data to an audio stamp (ie. allows other parts of the network to access the audio data it sees) - chain 'target' reads from foo.wav, applies the pitchScale LADSPA plugin and writes the processed data to the default ALSA pcm output - -ksv converts the audio data from stamp 1 (-eS:1, ie. the analogueOsc output) into control data, scales the value to range [0.5,2.0], and uses the resulting value to control the pitchScale coefficient - the audio->control conversion is done by calculating RMS-volume for each 128 (-b:128) sample block which is then used to update the LADSPA plugin parameter value Of course, it's possible to use any audio input source (files, real-time inputs, LADSPA plugins, effect presets, etc) in the 'generator' chain. PS Ecasound has had this functionality since 1.9dev1 (Feb/2001), so for once (!) you don't have to get the latest CVS version to try this out. ;) -- http://www.eca.cx Audio software for Linux!