Downmix to Mono output

[llama]

I am planning on building a kitchen playback zone using Ropiee and an old centre speaker. Are you able to manipulate ALSA config on Ropiee or is there another way to get the output downmixed to mono?

[GregD (Greg Dowling)]

You can do it with roon dsp.

See post below.

Can you set Roon to playback in mono

We didn’t make a mono button, but we did include a matrix mixer in the Procedural EQ using the “Mix” feature. It’s totally possible to mix both channels down to mono if you want: [image] Set it up like this: Left, Left, -3 Right, Right, -3 Left, Right, -3 Right, Left, -3 Pay attention to Headroom Management. If you’re clipping, either make more headroom, or make those -3’s a little bit more negative. You shouldn’t have to go below -6, but it’s nicer to attenuate less when possible.

[llama]

Thanks Greg.
I hadn’t considered doing this way… perfect - I shall start building

[CrystalGipsy (Resisting the flow!)]

I have used the method above for years on a home built bedroom speaker that’s mono. Works really well.

[Boris_Huber]

Hello,
Why gain -3dB?

Greetings and merry Christmas

[GregD (Greg Dowling)]

• 3db is half the signal power.

So if you’re adding two channels together if you drop them both by 3db it should give you back approx the same volume you started with.

Not guaranteed of course - so depending on the rest of your signal chain you may need a some extra headroom to avoid clipping.