I know this is an old thread but I’m facing the exact same issue. I can’t for the life of me figure out how to get Sonic Pi to detect my sound card.
I applied everything that was mentioned in the previous replies, I made sure to select the appropriate audio interface BEFORE booting up Sonic Pi. I did it before when using a multi-channel output device for connecting 2 headphones (1 USB and the other regular) and Sonic Pi detected the device just fine. But the sound card, no dice.
Here’s a description of my setup and the steps I took:
I’m using a Focusrite Scarlett 2i4 with Macbook Pro running Mojave
on input 1, I connected a vocal mic
on input 2, I connected my computer running Sonic Pi
my Sonic Pi version is up to date
I made sure to select the correct audio interface before booting up Sonic Pi
I tried to manually set the input to 1 in the code like so:
live_audio :voice, input: 1
I tested to leave it without giving it the input (since the default is 1 if I understand the docs correctly…)
I tried different numbers as input, just for the hell of it, to see if by any chance it would work
I tried wrapping an effect around live_audio, just to see if I could get anything to change:
with_fx :reverb, room: 1 do
live_audio :voice, input: 1
I also tried input 2 on my sound card and changed the code accordingly but no change.
I did a test in GarageBand and both inputs of the sound card are working fine…
But when I try to use it in SP, it detects the interface fine as output (I’m hearing the audio with headphones plugged in the sound card) but SP still uses the internal mic when I try to use
live_audio (even though, as I mentioned, I don’t have the built-in mic selected in my sound preferences!).
At first I was getting a result and I thought everything was working fine, until I realized I could hear the clicks of my typing through the
live_audio effects! I then muted the internal mic of my laptop and then didn’t get any output at all from
I really don’t know what I’m missing… I did some research to see if I could find anything on the Focusrite sound card that could give me a clue on the problem, the only thing I found that might be related (I’m not sure…) is this article.
In that post, they mention:
This message is a reminder that the Mac computer consists of zero control for the signals coming in and routed through and out from the Focusrite devices. In other words, Mac will not be able to boost or attenuate signals when the Focusrite interfaces are set as the primary devices in System Preferences under Sound. All signals going in and coming out are controlled by the Focusrite hardware directly.
I have no idea if that has anything to do with the problem but anyway, even if it does, how come the sound card works just fine when I use it with a DAW? I’m very confused…
I read the documentation on live_audio over and over again and tried all the examples. I can make it work just fine when using the internal microphone but that’s not a viable option for performing and recording… I would so much love to use it in a performance context…
Any help on this matter would be greatly appreciated