Port audio: error -9998

Submitted by jumpseven on Fri, 04/03/2009 - 01:28.

hi, I am trying to listen to a simple instrument using csound5gui
in real-time mode and I get an error message:

*** PortAudio: error: -9998: Invalid number of channels
Failed to initialize real time audio output

In the configure menu, I have output device set to dac
and buffer size set to default.

Does anyone know what the problem could be?

thanks

Submitted by mantaraya36 on Fri, 04/17/2009 - 14:59.

Hi,

Check nchnls in the orc header. You probably have 1 channel (mono), but your soundcard through portaudio cant accept that.

Cheers,
Andrés

Submitted by J05HYYY on Fri, 09/04/2009 - 21:12.

I got this error whilst using PortAudio (on it's own) with the "patest_wire" example.

I joined the PortAudio mailing list and asked about the problem.

I got an e-mail back from Ross Bencina saying that the problem could be due to the device not supporting stereo output.

I replied after trying the "patest_leftright" - which correctly played two different tone sine waves alternating between the left and right channel.

I got nothing back ... probably better to use something else instead.

Csounds.com