Mono Output

[firewalkwithmetotwinpeaks]

Hello,

I'm trying to configure raspotify to have a mono output.

I'm using a HIFIBERRY mini amp, I found some configurations, but I'm having a hard time to find how to use them in rapsotify.

Best regards

[JasonLG1979]

You're going to have to be more specific. Mono can mean a few different things on a 2 channel amp.

I'm going to assume you're not trying to bridge the amp.

The other 2 options are you're only going to use 1 of the 2 channels or you want dual mono. Which is it?

[firewalkwithmetotwinpeaks]

Hello, I am sorry for the vagueness of my request. My goal is to use only one channel of the soundcard. Not dual mono.

Best regards,

[JasonLG1979]

You'll want to use the Route alsa plugin.

Untested but something like this might do the trick:

pcm.!default {
    type route
    slave.pcm {
        type hw
        card 0
        channels 2
    }
    ttable.0.0 0.5
    ttable.0.1 0.5
    ttable.1.0 0.5
    ttable.1.1 0.5
}

This is for dual mono but I don't think it would hurt anything if one channel doesn't have a speaker connected to it.

[JasonLG1979]

You're giving up half your power only using one channel. You could use both channels with one speaker if it were dual voice coil or coaxial.

[JasonLG1979]

You're also going to have to use a pretty efficient speaker with only 3 x 2 watts. The specs don't say if 3 watts is the max or continuous so I'm going to assume it's the max so you're looking at maybe 2 watts clean. You'll need a speaker in the high 80's as far as SPL at least.

[firewalkwithmetotwinpeaks]

Thank you very much One more question, which file should I modify with these settings?

[JasonLG1979]

1. Open /etc/asound.conf with nano:

   sudo nano /etc/asound.conf

   By default the file does not exist if there is anything in the file delete it.

2. Paste this into it:

   pcm.!default {
      type route
      slave.pcm {
          type hw
          card 0
          channels 2
      }
      ttable.0.0 0.5
      ttable.0.1 0.5
      ttable.1.0 0.5
      ttable.1.1 0.5
   }

3. Exit and save:

   Ctrl+x y Enter

4. Restart raspotify:

   sudo systemctl restart raspotify

[firewalkwithmetotwinpeaks]

Thanks ! It works I had created the right file, but the instructions for ALSA must have been wrong.

[JasonLG1979]

@firewalkwithmetotwinpeaks if this solution works for you you can close the issue.

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