Also, although I haven’t tried ‘stat’ yet, I took one of the intermediate files and opened it in Audacity, and the section that is made with ‘pad’ is not a flat line, like I expected. It looks like low-level noise, which I imagine is causing the problem when all those tracks pile up. Is there any way to make ‘pad’ insert absolute silence, or is some sound necessary for it to actually take up time? Thanks Bob ------------------------------------------------------------------------------ _______________________________________________ Sox-users mailing list Sox-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/sox-users