I have a Raspberry Pi with a Hifi Berry Mini Amp. But I only connected one speaker to the hifi board. (I build a small radio with it)

Now I'd like to make sure that my speakers play everything. So, f.e. I plugged in the left channel. So now when I play something where only the right channel is used by the audio source, I'd like to hear that.

So basically -> Stereo to Mono conversion. I'd like a software/config only solution. Is that possible?

  • If you search online for "linux mono alsa pulseaudio" you should fine some stuff; the alsa method (it involves configuring a virtual soundcard) may be preferrable since it does not require pulseaudio, but pulseaudio requires alsa. OTOH, they are probably both installed and running, so the higher level solution (pulseaudio) may be better. If you find a solution that works, please post your own answer here. – goldilocks Sep 14 '19 at 15:56

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