macos – Supercollider recording microphone

Good morning community,

I am creating audio in WAV format with supercollider, but it is with a “mono” channel, I have not been able to correct the problem to obtain in “stereo”:

//Buffer.alloc in variable:
~recordBufId=Buffer.alloc(s,~sampleRate *~recordingTimeInSeconds,2,bufnum:~recordBufId);

I have also defined the following parameters in the server configuration:

s.options.numOutputBusChannels = 2;
s.options.numInputBusChannels = 2;

So far I get file with 2 channels, but only one with audio…