[MPlayer-users] scratching sound on some dts files (passthrough)

[Ulion]

2007/11/25, Markus Rothe <markus at unixforces.net>:
> Hello,
>
> I have a problem playing some dts files using the passthrough: The sound
> is 'scratched'. It sounds like an old record/platter/LP. It's seems to be
> a constant scratching, _not_ something like a hick-up every few seconds.
>
> An interesting aspect is that it's only happening with some files. Other
> files with the same sample and bitrate work fine. Here [1] are the first few
> seconds from a file which plays normal and [2] is a file which plays
> with 'scratches'. (There is no reason one file is bigger than the other by
> the way)
>
> Another information noteable is that xine plays both files the same way:
> Almost correct, it has another issue: very short 'hick-up' every few seconds
> on both files.
>
> I am running on amd64 hardware with ICH9 south bridge. The optical output is
> reported as IEC958. It's reproduceable on a friends Samsung laptop with ICH8
> south bridge.
>
> The Denon receiver shouldn't be broken, because I have an embedded system
> (Efika [3]) whose optical output is also reported as IEC958 and _both_ files
> play fine using passthrough.
>
> Both files play fine when I decode them with libdca and play them as stereo
> (also optical output).
>
> This is a bit complex. I hope the situation is clear now. Any ideas what could
> be wrong?
>
> Mplayer is cvs from 20070824.
>
> Regards,
>
> -markus
>
> [1] http://unixforces.net/~markus/stuff/audio_good_small_part.dts
> [2] http://unixforces.net/~markus/stuff/audio_broken_small_part.dts
> [3] http://www.pegasosppc.com/efika.php

Thanks great for your report, the difference between too dts is the
broken has an odd fsize 2013,
old mplayer have problem when swap byte endian for the last byte,
recent svn already fixed that problem. So the bug you descripted will
only happen on i386 machine and old mplayer, try newest svn and
compile mplayer for yourself, it will works fine. Test ok on my intel
machine with lastest svn source.

-- 
Ulion