mp3 conversion and frequency

linuxhippy · 04-14-2006, 02:20 PM

I have a large wav speech file (SPM4854.wav) that I would like to encode to an mp3 with 16 kHz 24 kbps single-ch MPEG-2 Layer III (10.7x) qval=3. Typing:

lame -s 16 -b 24 SPM4854.wav SPM48524.mp3

encodes an mp3 at 8 kHz and 24 kbps. I have sox-can I use that to help me make a file with a frequency of 16 kHz?

Marty

rickh · 04-14-2006, 03:27 PM

I think your lame options are wrong for what you're trying to do.

Without experimenting I can't tell you exactly the right ones, but I would try something like lame -a -V8 -b infile outfile to get a mono vbr at low quality. It should work.

My real advice would be to use Audacity and use the graphical interface. It's easier to understand if you're not sure what you're doing.

linuxhippy · 04-14-2006, 05:26 PM

audacity? I've used that to edit mp3 files, but it always saves mp3s at a bitrate of 128. I want that to be 24-how would I adjust that in audacity?

EDIT: I am using lame with audacity.

rickh · 04-14-2006, 05:31 PM

In Preferences, you can set Audacity to save MP3s at whatever bitrate you like.

linuxhippy · 04-14-2006, 05:34 PM

ah I see-I feel dumb...I've only been using audacity with lame for 3 years now. Thanks...that should work!

linuxhippy · 04-14-2006, 05:43 PM

Didn't work the way I wanted it. It saved at a bitrate of 24 in audacity but also used a frequency of 8 kHz which made the audio crack. 16 kHz would be ok-can I get that...I do on other audio files (not sure why)?