Audio Synchronisation - Does Anyone have the Answers ?

[kill1967]

Yes I was being really, really stupid !

Using BeSweet I was forcing the input source sampling rate to 
48000Kbps rather than the output sample rate.

Click the "Use MPA Decoder"
Click the "Downconvert Sample Rate"
Select "MP2" from the LAME box 
Immediately to the right of that click the SSRC box (next to LAME 3)
This will take you to a new menu
Click "Set Sampling Rate of Output file to" 48000
All the other featers there are just candy to improve the quality.

Assuming you've set up the files for Input and Output, then just 
click the MP2 button and it shoud work.

If not using BeSweet then I still think that you may be forcing the 
software to ignore the sample rate of the source and forcing it to 
48000, which will speed up the sound and give you the gibberish !

Hope this helps.


--- In ExtractStream@y..., "Don McAllister" <donmc@b...> wrote:
> John, did you ever get to the bottom of this ie resampling to 
48Khz. I
> seem to have the same problem ?
> 
> Cheers
> Don
> 
> -----Original Message-----
> From: kill1967 [mailto:johngibb@c...] 
> Sent: 29 May 2002 10:38
> To: ExtractStream@y...
> Subject: [ExtractStream] Audio Synchronisation - Does Anyone have 
the
> Answers ?
> 
> Can someone explain to me why I can resample a 32KHZ TiVo audio 
stream
> to 44.1KHZ and still keep perfect sync, yet resampling to 48KHZ 
causes
> major synchronisation issues ?
> 
> Steps.
> Convert .m2a to .wav using Winamp 
> Convert .wav to .mp2 (using force source sample to 44.1KHZ) using
> Besweet
> 
> Synch works fine.
> 
> Convert .m2a to .wav using Winamp
> Convert .wav to .mp2 (using force source sample to 48KHZ) using 
Besweet.
> 
> Synch is out by miles.
> 
> It seems weird that 44.1KHZ works fine yet 48KHZ causes issues. Has
> anyone got any idea ? (of course Winamp/Besweet may actually change
> the bitrate too, but it should be the same for both...Shouldn't 
it ? )
> 
> BTW does anyone know of a way to get either 32KHZ or 44.1KHZ streams
> to work in a DVD authoring package and which ones work ?
> 
> Cheers,
> 
> John
> 
> 
> 
> 
> 
> 
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