audio downmix to mono not working with usb-audio

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wuhi
Posts: 1
Joined: August 7th, 2013, 8:55 am

audio downmix to mono not working with usb-audio

Post by wuhi » August 7th, 2013, 9:03 am

hi there!

i'm running an mpd on raspberry pi.
i need a mono downmix because in some rooms i only use one speaker.
everything worked fine until i got an external usb-soundcard (sound blaster play)
the soundquality is perfect now. but only stereo.
mpd ignores format "44100:16:1" now.

my config is

Code: Select all

audio_output { 
         type                    "alsa"
         name                    "raspberrypi"
         device                  "hw:1,0" #usb
         format                  "44100:16:1" #force to mono
         mixer_type            "software"
}
so i just changed from "hw:0,0" to "hw:1,0" to use the usb soudncard instead of raspi's internal soundcard.
with the internal sound i was able to get the mono downmix with format "44100:16:1".
but not with the usb soundcard.

any ideas why mpd is not able to handle this?

regards,
wuhi

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