Playback rate adjustment on Android

[Bill Cox]

Hi, Thomas and others.  The youtube video unfortunately shows speeding
up music rather than speech, which is unfortunate.  I've downloaded
the rockbox source code and examined the tdspeed.c algorithm they use
carefully.  It speeds up speech extremely well, with low distortion,
up to 2.5X.  That limit of 2.5X is artificial, as the author probably
thought no one listens faster than that.  However, with minor
adjustments, it does 4-5X speed up very well.  I am not sure, but I
think sonic sounds very slightly better at these speeds, but it could
be my imagination.

Bill

On Fri, Nov 5, 2010 at 8:29 PM, Thomas Lloyd <thomaslloyd at yahoo.com> wrote:
> Hi Bill & Others,
>
>
> Sorry this is a little bit off topic but I thought that others might be
> interested.
>
> Here is a quick youtube video giving a run through of Rockbox and its
> facility to adjust rate and pitch of whatever it is playing back running
> on android.
>
> http://www.youtube.com/watch?v=abonKymtfUQ
>
> Take a peek and see what you think, please contact me off the list if
> you want more information and feel free to send this onto anyone else
> who might be interested.
>
> I apologies in advance for the clarity of the video.
>
> Thanks,
>
> Tom
>
>
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