AnimeSuki Forums

frad113 · 2007-09-30, 19:11

I am having porblems with some .mkv's where the audio is encoded in AAC (such as Kanjisub's Hachikuro Movie or Static Subs' Mai Otome); the BGM portion of the audio is loud, whereas the voices are hardly audible. What is the cause? As always, thanks in advance.

hobbes_fan · 2007-09-30, 19:41

Is the AAC track in 5.1? If it is and you're running a 2 speaker stereo setup/headphones you will have this problem. Basically if it is a 5.1 AAC track there's supposed to be played through a 6 speaker setup: center (which is mainly for the vocal), surround the other 4 (Front L+R, Rear L+R) speakers like ambient sounds BGM, echoes etc etc and a subwoofer (This is the .1 of the 5.1) for the low end noises like the rumble. Basically what is happening is if you're trying to force it into two speakers the vocals get lost in the mix. There is no discrete channels just Left and Right. There are ways around this though depending on what Media Player you use and if you use a soundcard.

If you are using 5.1 speakers adjust the volume of the Centre speaker.

I assume you are using CCCP on Windows XP? go to the the settings of CCCP and you should see a menu FFDSHOW AUDIO SETTINGS and a whole list of options in the dropdown menu, play around with the options (I don't know what you have so trial and error is the best way). Some of the options should help you with this problem.

frad113 · 2007-10-01, 00:22

Aah, I see what the "problem" is. The ffdshow audio decoder's swap channels filter lets me remap channels, but it only lets me map the center channel to either right or left (or whatever), not both. Is there something like "downsample to 2.1"?

***GHDpro*** · 2007-10-01, 01:21

I think you should select the "Mixer" setting instead and specify you have a 2.0 setup. Afaik ffdshow should then automatically downmix whatever source audio to your stereo setup.

Nicholi · 2007-10-01, 11:26

Indeed the key here would be in the Mixing settings. Not in swapping channels. If you are already using the CCCP it should by default be set to "2/0 stereo mixing". However if you turn on the custom graph mixing you can take more control here. Such as boost how the Center channel is mixed into the L/R channels, and of course decrease others (I find that even with my 6ch speaker setup my Center speaker is far too weaksauce to handle all vocals on 5.1 content, so I typically mix 0.5 of Center into the L/R channels so I can hear it all better, this is unrelated to your problem though). Also don't forget the Volume filter either.

hobbes_fan · 2007-10-01, 19:43

Huh where's the channel mapping? This is what I get with my settings

frad113 · 2007-10-01, 21:45

@GHDpro and Nicholi: problem solved, what kind of cookies would you like?

@hobbes_fan: go to Start -> Programs -> CCCP -> ffdshow audio decoder.

martino · 2007-10-02, 02:14

Quote:

Originally Posted by hobbes_fan

Huh where's the channel mapping? This is what I get with my settings

The bit which says "FFDShow Audio Settings". In there you just choose from the drop down box your own speaker configuration.

hobbes_fan · 2007-10-02, 03:31

That's not what I meant, this is what I was after

as well as the eq options in the ffdshow audio decoder options as I run my PC into a DD setup and was after a little bit better spatial representation.

Nicholi · 2007-10-02, 07:36

Right here.

You'll see I "remapped" the Left channel to the right speaker and the Right channel to the left. Recommended that you don't use any internal filters in MPC that you don't need to, and you don't need to use this feature in MPC. FFDShow's is obviously superior to MPC's in that you can choose how much of the channel is being sent to each output, rather then just being able to remap them.

Thingle · 2007-10-02, 08:14

Reinstall CCCP. I had that problem too when I first used my notebook to watch mkv files.

2007-09-30, 19:11	Link #1
frad113 Senior Member Join Date: Dec 2005	AAC Audio Encodes I am having porblems with some .mkv's where the audio is encoded in AAC (such as Kanjisub's Hachikuro Movie or Static Subs' Mai Otome); the BGM portion of the audio is loud, whereas the voices are hardly audible. What is the cause? As always, thanks in advance.

2007-09-30, 19:41	Link #2
hobbes_fan You could say..... Join Date: Apr 2007	Is the AAC track in 5.1? If it is and you're running a 2 speaker stereo setup/headphones you will have this problem. Basically if it is a 5.1 AAC track there's supposed to be played through a 6 speaker setup: center (which is mainly for the vocal), surround the other 4 (Front L+R, Rear L+R) speakers like ambient sounds BGM, echoes etc etc and a subwoofer (This is the .1 of the 5.1) for the low end noises like the rumble. Basically what is happening is if you're trying to force it into two speakers the vocals get lost in the mix. There is no discrete channels just Left and Right. There are ways around this though depending on what Media Player you use and if you use a soundcard. If you are using 5.1 speakers adjust the volume of the Centre speaker. I assume you are using CCCP on Windows XP? go to the the settings of CCCP and you should see a menu FFDSHOW AUDIO SETTINGS and a whole list of options in the dropdown menu, play around with the options (I don't know what you have so trial and error is the best way). Some of the options should help you with this problem.

2007-10-01, 00:22	Link #3
frad113 Senior Member Join Date: Dec 2005	Aah, I see what the "problem" is. The ffdshow audio decoder's swap channels filter lets me remap channels, but it only lets me map the center channel to either right or left (or whatever), not both. Is there something like "downsample to 2.1"?

2007-10-01, 01:21	Link #4
*GHDpro* Administrator Administrator Join Date: Jan 2001 Location: Netherlands Age: 45	I think you should select the "Mixer" setting instead and specify you have a 2.0 setup. Afaik ffdshow should then automatically downmix whatever source audio to your stereo setup.

2007-10-01, 11:26	Link #5
Nicholi King of Hosers Join Date: Dec 2005 Age: 41	Indeed the key here would be in the Mixing settings. Not in swapping channels. If you are already using the CCCP it should by default be set to "2/0 stereo mixing". However if you turn on the custom graph mixing you can take more control here. Such as boost how the Center channel is mixed into the L/R channels, and of course decrease others (I find that even with my 6ch speaker setup my Center speaker is far too weaksauce to handle all vocals on 5.1 content, so I typically mix 0.5 of Center into the L/R channels so I can hear it all better, this is unrelated to your problem though). Also don't forget the Volume filter either.

2007-10-01, 19:43	Link #6
hobbes_fan You could say..... Join Date: Apr 2007	Huh where's the channel mapping? This is what I get with my settings

2007-10-01, 21:45	Link #7
frad113 Senior Member Join Date: Dec 2005	@GHDpro and Nicholi: problem solved, what kind of cookies would you like? @hobbes_fan: go to Start -> Programs -> CCCP -> ffdshow audio decoder.

2007-10-02, 03:31	Link #9
hobbes_fan You could say..... Join Date: Apr 2007	That's not what I meant, this is what I was after as well as the eq options in the ffdshow audio decoder options as I run my PC into a DD setup and was after a little bit better spatial representation.

2007-10-02, 07:36	Link #10
Nicholi King of Hosers Join Date: Dec 2005 Age: 41	Right here. You'll see I "remapped" the Left channel to the right speaker and the Right channel to the left. Recommended that you don't use any internal filters in MPC that you don't need to, and you don't need to use this feature in MPC. FFDShow's is obviously superior to MPC's in that you can choose how much of the channel is being sent to each output, rather then just being able to remap them.

2007-10-02, 08:14	Link #11
Thingle Banned Join Date: Aug 2007 Location: Imperial Manila, Philippines	Reinstall CCCP. I had that problem too when I first used my notebook to watch mkv files.