[icecast] bitrate for slow modems

John Griffiths john at capmon.com
Thu Apr 5 22:11:23 PDT 2001



total smeggin genius

witched them over to mono and much happier....

At 02:53 PM 4/6/2001 +1000, you wrote:
>On Fri, 6 Apr 2001, John Griffiths wrote:
>
>> ok so 24kbps for 56k modems...
>>
>> can i go any lower and get the 28 k modems? (still a lot of them about) or will 24 be good enough fo that?
>
>As others have said, 16kbps should do the trick.  Keep in mind though that
>the quality of the sound will also depend on the sampling rate.  MP3 will
>handle some higher sampling rates higher than some of the lame defaults.
>For example, 16kbps 11khz mono sounds very reasonable.  At 24kbps, either
>22khz mono or 11khz stereo sound pretty good, though the latter is a bit
>iffy under lame.  At least with 24kbps however, these aren't the lame
>defaults.  Mono will give you 16khz and stereo gives you a lowly 8khz
>(yuck!).  You can get lame to do higher sampling rates by using the
>resample argument rather than letting it decide where to resample to.  You
>can also improve sound quality by fiddling with the lowpass filter (IMHO,
>it can be a bit conservative and can do with being raised a bit at times).
>As a final tip, if you're encoding in mono, try out the experimental voice
>mode, it might actually make things sound better (e.g. 24kbps 22khz mono
>with --voice sounds pretty good).
>
>Geoff.
>
>
>
>--- >8 ----
>List archives:  http://www.xiph.org/archives/
>icecast project homepage: http://www.icecast.org/
>To unsubscribe from this list, send a message to 'icecast-request at xiph.org'
>containing only the word 'unsubscribe' in the body.  No subject is needed.
>Unsubscribe messages sent to the list will be ignored/filtered.
>
>

--- >8 ----
List archives:  http://www.xiph.org/archives/
icecast project homepage: http://www.icecast.org/
To unsubscribe from this list, send a message to 'icecast-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.



More information about the Icecast mailing list