Thanks for your reply. On Tuesday 24 May 2005 15:58, anahata wrote: > On Tue, May 24, 2005 at 02:44:04PM -0400, M P Smoak wrote: > > In my work I use telephone in similar ways. In both cases, > > phone calls are data. > > [snip] > > > But it's too big. Saving it as a .ogg file with quality = 4 > > gets it down to about 5 meg, I think. So the question is > > what's a good way to shrink it down? > > For voice you could get away with a lower quality ogg and/or > resampling to a lower sample rate (digital telephony itself > uses 8kHz) Yes, I think I can use a lower quality ogg file or perhaps mp3. And I looked a bit at resampling. Am I correct in thinking that it is good to record a high sample rate (say 44K), then normalize the recorded conversation, and then resample to a lower sample rate and save as an ogg or mp3? > > For the ultimate in voce compression however, there are free > GSM compression/decompresison tools. In debian the gsm-utils > pachage seems to the the thing you need, no doubt will pull in > all the various libgsm* packages too. I haven't used it, but > if you can get it to do what you want you waon't get better > voce compression. You really lost me here. gsm-utils package is for communicating with mobile phones. We are using conventional telephones, with linux being involved only for recording and saving the calls on conventional desktop/workstation machines. Presently, I record using linux via rezound; audacity could be used instead on the prefessors Windows laptop. Which linux/windows/mac recorders/ players utilize gsm compression? > > > what type file will it be that is easily platform > > independent > > Ogg vorbis is quite portable. Don't know about the GSM tools. Again thanks, Marv
