This is SOX-10 Patchlevel 11! I took the source from swiss, modified the files makefile.unx, smp.c, handlers.c and compiled it with 'gcc [...] -DDOS -O2 [...]' (gcc 2.4.5 PL1) on my Atari ST. The sound extension .snd is set to headerless unsigned-linear 8-bit mono (used also by the MACs!). I ran the test-shell-scripts (tests.sh and testall.sh) coming with the source to find compilation errors. No errors so far... Use less to read sox.man - first! Try also the following three effects not mentioned in the manual: highp, pred and reverse. Try lps v1.22 to replay sounds on your Atari ST. lps is located at ftp.uni-erlangen.de in /pub/atari/sound/players/samples/ Bye Uwe (is uereder@cip.informatik.uni-erlangen.de).