as promised .... (and for what it's worth) box1:~/bin$ cat guitar_mix_pre.sh #!/bin/sh # # guitar_mix_pre.sh # # follow up script to guitar_mix_pre.py # # concatenates files [0-11].wav to track[1-4].wav # using ecasound cut and paste operations. # all of the files from the pool are between 300.0 and 301.44 # seconds long ... there might be some way to get the length # from ecalength and use that when concatenating ... # for now assume all files are 302s long # eventually do this from python with ECI or python EIM # and get the real length of each file before appending # (or maybe just never worry about that and leave the gaps) # tmp_dir=/mnt/ramfs/guitar_mix/ eca="ecasound -q" cd $tmp_dir c=0 for i in `seq 1 4`; do #first 1/3 mv -f $c.wav track$i.wav #second 1/3 c=$(($c+1)) $eca -i $c.wav -o track$i.wav -y:302 rm -f $c.wav #third 1/3 c=$(($c+1)) $eca -i $c.wav -o track$i.wav -y:604 rm -f $c.wav c=$(($c+1)) done Eric Dantan Rzewnicki wrote: > > To be more specific and add another vote for ecasound, here is an > example from the ecasound docs at > http://www.wakkanet.fi/~kaiv/ecasound/Documentation/examples.html: > > " Cut, copy and paste > > 1. ecasound -i bigfile.wav -o part1.wav -t:60.0 > 2. ecasound -i bigfile.wav -y:60.0 -o part2.wav > > Here's a simple example where first 60 seconds of bigfile.wav is > written to part1.wav and the rest to part2.wav. If you want to combine > these files back to one big file: > > 3. ecasound -i part2.wav -o part1.wav -y:500 > > part2.wav is appended to part1.wav " > > I'm using this functionality in a shell script that takes 12 ~5 minute > wav files and concatenates them into 4 ~15 minutes wav files. I'll post > it tonight when I get home from work. > > ecasound can also give you the length in seconds (and milliseconds) of a > file so that you can possible script your insertion points ... I haven't > figured that out exactly, yet, but believe it can be done by parsing the > output of ecalength (an ecasound tool included with ecasound). There may > be a cleaner, easier way as well. > > -Eric Rz.