mp3 ABR encoded by BeSweet/LAME reports as 32 kHz

[JimmyBarnes]

I'm used to encoding mp3s from the VOBs using VOB2Audio

Crappy it may be but it was predictable and usually gave good results.

When I encode the appropriate 384 kbps AC3 stream using BeSweet v1.3b12/LAME v3.89 MMX, using Joint Stereo and ABR, it gives me an mp3 that WinAmp reports as only 32 kHz, not 48 kHz as usual. Why??

thanx
JB

[Fox Mulder]

What bitrate are you using? L.A.M.E. resamples everything below 119 Kbps when the source is in 48Khz.
http://forum.doom9.org/showthread.php?s=&threadid=23859&highlight=32Khz

[JimmyBarnes]

Originally posted by Fox Mulder
What bitrate are you using? L.A.M.E. resamples everything below 119 Kbps when the source is in 48Khz.
http://forum.doom9.org/showthread.php?s=&threadid=23859&highlight=32Khz

96 kbps for an 84 min animated movie/1 CD rip
I hate 2+ CD rips :mad:

I notice I can force the sampling frequency of the output to be 48 kHz. If this is a bad idea, why - what audible difference will it make?

Also (incredibly dumb question, no doubt): why is 32 kHz output much worse than 48 kHz - again, what is the audible difference?

JB

[b0b0b0b]

I think 32khz is great. The only trouble with lower than 44.1khz sampling is sometimes your movie playback is affected. <=32khz with ogg and ogm + zoomplayer results in sound that is high pitched. <32khz with mp3 then your movie playback will be 2x but the sound will be 1x. 32khz for your 1cd rip should be fine.

[JimmyBarnes]

Originally posted by b0b0b0b
I think 32khz is great.

That's good to "hear" :)

The only trouble with lower than 44.1khz sampling is sometimes your movie playback is affected.

<32khz with mp3 then your movie playback will be 2x but the sound will be 1x.

What about for the =32 kHz case?

What does 2x movie playback mean anyway? Do you mean twice as fast?

32khz for your 1cd rip should be fine.

Any idea of the underlying theory - why LAME downsamples MPEG-1 streams less than 128 kbps to 32 mHz?

thanx
JB