Re: [iPAQ] underwater audio

Nicolas,

I built madplay for the ipaq and it sounds great!

Dwayne

> On Fri, 22 Sep 2000, Dwayne Jacques Fontenot wrote:
>
> >
> > > On Fri, 22 Sep 2000, Dwayne Jacques Fontenot wrote:
> > >
> > > >
> > > > Nicolas,
> > > >
> > > > Are you saying that I am actually hearing decoding errors and not a problem
> > > > with the sound driver?
> > >
> > > Testing your mp3 with madplay would tell.
> >
> > same version (?) 0.59r of mpg123 on my PC plays it fine.
> >
> > I will also try madplay, but it sounds perfect in mpg123 x86 as it is.
>
> Understand that the SA1110 CPU doesn't have a FPU. For that reason, a MP3
> player must implement fixed point computation to run real time on the
> iPaq.
>
> On a PC, mpg123 uses floating point operations because the CPU supports
> them, and mpg123's floating point accuracy is rated "full compliant". On
> iPaq, mpg123 uses its fixed point implementation but this time its
> accuracy is rated "not compliant".
>
> > heh, "go bubble". :-) You make it sound like a standard term. :-)
>
> Having worked on MP3 decoding routines and audio processing for some time,
> that's the term (or more exactly a translation of it) we used in my team
> when the MP3 decoder failed to produce the correct output. The most
> common sign of a lack of accuracy in the computed signal is the impression
> of bubbles in the sound...
>
> Nicolas
Received on Sun Sep 24 01:05:48 2000