[linux-audio-user] Speeding up Speech

[Phillip Blevins]

On Mon, 31 Jan 2005 18:25:58 +0100, Dirk Jagdmann <doj at cubic.org> wrote:
> Phillip Blevins wrote:
> > Ah, thanks for the suggestion, I had wondered about using a high
> > sample rate at high speed and then slowing it down. Any idea how
> > slowing the file down could be accomplished?
> 
> The trick here is to just record and don't make any conversion. How will
> then just need to alter the WAV header to the correct sample rate (this
> can be done on good audio software). I'll explain this closer.
> 
> We assume you have a tape running at 4x speed. Then you'll sample with
> 88.2KHz. If you would play back this recorded sample with 22KHz then it
> will be played 4x too slow. But has we have recorded it 4x too fast
> you'll have the correct speed.
> 
> Every good audio/sample editor can adjust the sample rates *without* any
> conversion (so they just alter the values in the file headers). If you
> favourite sample editor insists on converting sample rates you should
> either get yourself a better program or just load a hex editor and
> change those 4 bytes for yourself (assuming .wav).

Thanks for the info, I found that its very easy to do from audacity
and it does indead slow things down :-). i don't have access to a high
speed player (yet) but I'll give it a try soon.



> > As for my track splitting question - I've found tracksplit
> > http://sourceforge.net/projects/tracksplit/  which allows me to
> > specify a minimum track lenth the and the amount of silence to split
> > on. This turns out to be perfect for voice wave data.
> 
> [I posted this answer again to LAU, as I think other might be interested
> in my anser as well.]
> 
> --
> ---> doj / cubic
> ----> http://cubic.org/~doj
> -----> http://llg.cubic.org
>