Sox will strip silence. Here's what I do with telephone messages recorded by vgetty: sox in.wav out.wav silence 0 1 02.00 1% On Sat, 25 Sep 2004 21:10:43 +0400, Mikhail Ramendik <mr@xxxxxxxxxxx> wrote: > Hello, > > This time I am encoding from a cassette with a rather low noise level. > And I'd like to do several things automatically, from the command line, > rather than call up Audacity and GWC and do some manual selection. > > So, which command line tools(if they are available, of course) will: > > - Do lowpass filtering? > > - Cut off the silence in the beginning and the end? > > - Split a file into songs based on long periods of silence in betweeh > them? > > For the latter two points, the silence is not absolute, there is some > noise at about -40 db. The tool I want would take a "noise level" value > in db as a parameter. The REALLY good tool would leave about a second of > "silence" before/after a song intact, because it may contain the > beginning or end that are below the threshold. The PERFECT tool would > also be able to look at a file with just noise and give me that db > value, but it may be too much to ask, so I can find out in Audacity as > well. > > So - are these tools available? Or am I out of luck? Of course, I can > use GWC to split a file into songs and Audacity to cut out the silence > manually, but that's quite a lot of mouse-dragging for an operation that > could be automatic. > > Yours, Mikhail Ramendik > > -- De gustibus non disputandum est.
