[MPlayer-users] Low voice with 6 channel DTS and libdca

[Giacomo Comes]

On Tue, Sep 18, 2007 at 01:29:34PM +0000, amadeo wrote:
> I've played the sample from
> http://www.sr.se/laddahem/MultiKanal/Dts/SURROUNDTEST_011212.zip with the not so
> long ago added libdca decoder, which is the default DTS decoder now in MPlayer,
> and noticed that after a view seconds of playing the voice get very low and
> barely understandable. I think this affects only one particular channel because
> before the voice was fine. Can somebody confirm this? Maybe someone who speaks
> Swedish can tell which channel it is.
> 
> 
> Here's my mplayer output in case someone is interested:
> 
> MPlayer dev-SVN-r24562-4.2.1 (C) 2000-2007 MPlayer Team
> CPU: AMD Athlon(tm) 64 Processor 3000+ (Family: 15, Model: 31, Stepping: 0)
> CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
> Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE SSE2
> Menu inited: /etc/mplayer/menu.conf
> 
> Playing SURROUNDTEST_011212.wav.
> 
> Audio file file format detected.
> ==========================================================================
> Opening audio decoder: [libdca] DTS decoding with libdca
> AUDIO: 44100 Hz, 6 ch, s16le, 1411.2 kbit/33.33% (ratio: 176400->529200)
> Selected audio codec: [dts] afm: libdca (DTS-libdca)
> ==========================================================================
> AO: [alsa] 44100Hz 6ch s16le (2 bytes per sample)
> Video: no video
> Starting playback...
> A:   0.9 (00.8) of 126.0 (02:06.0)  8.2% 95%
> 
> Exiting... (End of file)

I can play the sample without problem.
Both downmixing to two channels and decoding all the six channels
and listen to each channel separately (I don't have a 6 channels setup).

I don't know Swedish but if you listen in stereo any pay attention
to the words it is easy to tell which channel you are listening.
In the sample the order is L C R Ls Rs LFE.

I can test only on 32 bit intel cpu. It would be good if somebody
else can test on AMD cpu and or 64 bit mplayer.

Ciao
Giacomo