Re: [xine-user] DTS Audio via SPDIF.

[Michael R. <ama...@fr...>]

> I have just checked in a fix to the CVS.
> Can people please test it, and tell me how good/bad it is, because I
> cannot test it.

I've just tested the DTS output with my DXR3 but it didn't work. At 
least it works better than before:

Situation without your patch:
- amplifier doesn't detect DTS stream
- silence

Situation with your patch:
- amplifier sometimes detects corrupt DTS stream
- sometimes silence, sometimes a crackling sound

BUT:
It is possible that your fix did absolutely right.
A while ago I posted on the DXR3 list concerning DTS and got the 
following answer from Anton Altaparmakov:

> Does AC3 work for you? If it does, I suspect one or both of the
> following problems. If it doesn't then try to get that to work first,
> and see if DTS works after that.
>
> 1) You are using an out of date micro code not supporting DTS. IIRC
> the dxr3/h+ cards did not support DTS until some later point in time.
> I remember reading something to that effect on the Creative or Sigma
> web pages or newsgroups (sorry really can't remember).
>
> 2) Perhaps more likely than 1), the current em8300 driver does the
> wrong thing. IIRC, when I reversed the spdif prepare function into C
> code, Henrik and I noticed that a newer version of the driver had a
> different spdif prepare function (the output patterns produced were
> actually different). However, IIRC, I was already finished with the
> old one, and considering my Cambridge Soundworks Digital Desktop
> Theatre was recognizing the produced spdif signal as AC3 and digital
> DVD sound was playing nicely we left it at that. I don't think I have
> any DTS DVDs and even if I do my now antiquated Dolby decoder doesn't
> support DTS so I am unable to test. If DTS requires some kind of
> modified spdif signal, e.g. the one done by the newer driver, perhaps
> the problem is that we are not producing the right signal so it is
> not being recognized as DTS-spdif... OTOH, it is certainly possible
> that this has nothing to do with your problem whatsoever! Just an
> idea.
>
> Anton

Just to avoid the question: AC3 passthrough works for me.

Michael Roitzsch