Default samplerate - Airtime Support Discussions on Sourcefabric Forum

Alexandru Matei · Post edited by Alexandru Matei at 2012-03-07 16:19:21

Hi!

For our radio station we broadcast on 64kbps. When testing airtime I noticed the sound's quality was poor. Couldn't blame liquidsoap for reencoding because I used it before on the same songs. I then saw in ls_script that when defining output.icecast you only define the bitrate. The default for samplerate is 44 100. But at low bitrates the quality of the sound way become very poor. I hardcoded the script and now it's ok. For 64kbps we use 22 050 for samplerate.

This is what I added to ls_lib.liq

if type == "mp3" then

if bitrate == 24 then

ignore(output(%mp3(bitrate = 24),s))

elsif bitrate == 32 then

ignore(output(%mp3(bitrate = 32),s))

elsif bitrate == 48 then

ignore(output(%mp3(bitrate = 48),s))

elsif bitrate == 64 then

ignore(output(%mp3(bitrate = 64, samplerate = 22050),s))

elsif bitrate == 96 then

ignore(output(%mp3(bitrate = 96),s))

elsif bitrate == 128 then

ignore(output(%mp3(bitrate = 128),s))

elsif bitrate == 160 then

ignore(output(%mp3(bitrate = 160),s))

elsif bitrate == 192 then

ignore(output(%mp3(bitrate = 192),s))

elsif bitrate == 224 then

ignore(output(%mp3(bitrate = 224),s))

elsif bitrate == 256 then

ignore(output(%mp3(bitrate = 256),s))

elsif bitrate == 320 then

ignore(output(%mp3(bitrate = 320),s))

end

else

Don't you think you should allow the user to choose the samplerate? Or... you may set in the script suitable samplerates for all possible bitrates?

Alexandru!

Martin Konecny

Hi Alexandru,

We've created a ticket here:

http://dev.sourcefabric.org/browse/CC-3400

Howdy, Stranger!

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