2015-02-15 11:21 GMT+01:00 Pavel Machek <pavel@xxxxxx>: > Hi! > > By default, output goes to loudspeaker (top right relative to > keyboard). Any ideas how to switch it to the speaker on the left or > wired headset? Because I suspect that echo cancelation is not going to > be simple... > Pavel > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html Hi, in case of direct alsa output (not PA), setup is pretty complex. Headphones referenced as line. All audio outputs are differential. Here are controls that affects volumes... global: PCM (volume) left/right DAC mux (below) -- DAC_L1/R1 passes sound to loudspeakers, line, (maybe others) -- DAC_L2/R2 passes sound to loudspeakers, NOT line, (maybe others) -- DAC_L3/R3 passes sound to NOT loudspeakers, line, (maybe others) if DAC_L1/R1 is chosen, you can hear lower volume on both outputs in compare to dedicated outputs (DAC_L2/R2, DAC_L3/R3), probabbly due to higher load of ADC loudspeakers: Speaker function (on) HP (unmute) HP DAC (volume) left HP Mixer DACL1 (below) right HP Mixer DACR1 (below) --unmute theese two, this will pass left channel sound to left channel output and vice versa left HP Mixer DACR1 (below) right HP Mixer DACL1 (below) --mute these two, this controls channel crosstalk ( amount of left channel sound going to right channel output and vice versa) line: line (unmute) line DAC (volume) jack function (headphone) TPA6130A2 Headphone (volume) left Line Mixer DACL1 (below) right Line Mixer DACR1 (below) --unmute theese two, this will pass left channel sound to left channel output and vice versa left Line Mixer DACR1 (below) right Line Mixer DACL1 (below) --mute these two, this controls channel crosstalk ( amount of left channel sound going to right channel output and vice versa) -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
