Re: [Openvortex-dev] Latest CVS

[Jeff Muizelaar]

On Sat, 21 Jun 2003, Callum Lerwick wrote:

> > One other thing is the card only seems to work in 44.1 KHz (or is it
> > 48 KHz?). I tried playing Maelstrom (which uses mono samples in the 11
> > KHz range) and the sound stutters badly (it sounds like the stutters
> > are repeated 3 times, but it could be 4). Has multiple sample rate
> > playback been addressed yet?
>
> This is a known bug. Low sample rates seem to cause a strange buffer
> underrun condition in direct relation to buffer/fragment size. The
> workaround is to increase the buffer size until it stops. This can be
> easily done on such things XMMS plugins, but on something like Maelstrom
> you'd probably have to hack the source. ;P
>
> Hey, does the Vortex lock the codec at 44.1/48khz at all times? I
> remember everyone complaining about when using S/PDIF on an SB Live, the
> codec is always locked at 48khz, recording 44.1khz audio is upsampled to
> 48khz, then back down to 44.1khz if you're recording at 44.1, and the
> same thing is done on output. Untouched 1:1 digital output/input is
> needed for real studio use. Apparently the Vortex IS capable of at least
> outputting untouched digital output, including outputting AC3 to an
> external decoder. Do we have any clue how S/PDIF works at all?
>

Going from memory...
I believe it should be as 'simple' as initing that
area and then adding the spdif-out into the adb route.
Did anyone have digital out working with binary driver?
I seem to remember that it could, but that could be wrong.

-Jeff