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AlmaMater

Member

Registered: 2007-02-28

Posts: 100

*SOLVED* Downmixing DTS/ac3 audio into 2 channels?? (manual way)

Hi all,

Well, my question is very simple:

I have some DTS/ac3 movies, but i only have 2 speakers. I know that by default the sound is downmixed to 2 channels, but im not happy about the result. Almost in every movie what you can't hear the most are the voices for example,  and this even increase whit DTS sound to a level when is unconfortable to watch the movie.
I have been googling for answers and i have tried diferents asound.conf configurations for example without a result

Just wondering if anybody had my problem , and have a sucesfull configuration for a pleasent 2 channels experience :b

I use mplayer btw, whit alsa

my soundcard

[root@boX almamater]# lspci | grep -i audio
00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1)

[root@boX almamater]# lsmod | grep snd
snd_usb_audio          76512  0
snd_usb_lib            15232  1 snd_usb_audio
snd_hda_intel         295840  5
snd_rawmidi            19232  1 snd_usb_lib
snd_hwdep               7428  2 snd_usb_audio,snd_hda_intel
snd_seq_oss            29568  0
snd_seq_midi_event      6656  1 snd_seq_oss
snd_seq                47056  4 snd_seq_oss,snd_seq_midi_event
snd_seq_device          7052  3 snd_rawmidi,snd_seq_oss,snd_seq
snd_pcm_oss            37152  0
snd_pcm                69124  4 snd_usb_audio,snd_hda_intel,snd_pcm_oss
snd_timer              19332  3 snd_seq,snd_pcm
snd_page_alloc          8200  2 snd_hda_intel,snd_pcm
snd_mixer_oss          14592  1 snd_pcm_oss
snd                    45476  19 snd_usb_audio,snd_hda_intel,snd_rawmidi,snd_hwdep,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss
soundcore               6496  1 snd
usbcore               123016  6 usbhid,snd_usb_audio,snd_usb_lib,ohci_hcd,ehci_hcd

[almamater@boX ~]$ pacman -Q | grep alsa
alsa-lib 1.0.15-1
alsa-oss 1.0.15-1
alsa-plugins 1.0.15-1
alsa-utils 1.0.15-2

[almamater@boX ~]$ aplay -L
default:CARD=NVidia
    HDA NVidia, ALC883 Analog
    Default Audio Device
front:CARD=NVidia,DEV=0
    HDA NVidia, ALC883 Analog
    Front speakers
surround40:CARD=NVidia,DEV=0
    HDA NVidia, ALC883 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
    HDA NVidia, ALC883 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
    HDA NVidia, ALC883 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
    HDA NVidia, ALC883 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
    HDA NVidia, ALC883 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=NVidia,DEV=0
    HDA NVidia
    IEC958 (S/PDIF) Digital Audio Output
null
    Discard all samples (playback) or generate zero samples (capture)

Any help would be very apreciated, since this is the last configuration to finally enjoy my linux setup :]

Cheers

Last edited by AlmaMater (2008-01-30 05:01:46)

skottish

Forum Fellow

From: Here

Registered: 2006-06-16

Posts: 7,942

Re: *SOLVED* Downmixing DTS/ac3 audio into 2 channels?? (manual way)

Read through this. The "downmixing 6-channel PCM" section will hopefully be what you need.

http://www.mplayerhq.hu/DOCS/HTML/en/ad … ls-copying

AlmaMater

Member

Registered: 2007-02-28

Posts: 100

Re: *SOLVED* Downmixing DTS/ac3 audio into 2 channels?? (manual way)

Read through this. The "downmixing 6-channel PCM" section will hopefully be what you need.

http://www.mplayerhq.hu/DOCS/HTML/en/ad … ls-copying

Thanks Skottish, i missed that part in the mplayer documents

Actually
gmaplyer xxx.mkv -channels 6 -af hrtf

was the answer, till i get to study and to test and errors configs

cheers m8 :]