Variable I/O channels about ofxpd HOT 9 CLOSED

Are you also setting up the ofSoundStream for 16 channels? Does it allow selecting the device? ofxPd only knows about the number of channels you give it, you need to make sure that matches what the sound stream is giving it.

from ofxpd.

Thanks for the quick reply! Yes, I have it set up in the following manner:

int ticksPerBuffer = 8;
int numInputs = 16;
int numOutputs = 16;
ofSoundStreamSetup(numOutputs, numInputs, this, 44100, ofxPd::blockSize()*ticksPerBuffer, 3);
pdOps = new PdOps;
pdOps->setup(numOutputs, numInputs, 44100, ticksPerBuffer);

I suspected it might be a sound stream issue, but wanted to check here too. I will close this issue and keep trying to find a way to query the number of channels to set up the sound stream dynamically, and will post a follow-up if I find a solution.

Thanks for the great add-on!

from ofxpd.

I think the problem is you can't really select which sound device ofSoundStream uses. If you're on OS X, you could try setting the external device as the default sound in and output in the Audio MIDI Settings app.

from ofxpd.

While I wish there were a way to do that, I'm mostly interested in just allowing the user to specify which channels they want to use. It's OK with me if they just set up their default device in Audio MIDI Settings before starting the app.

There is a way to query the available devices from sound stream, but all it does is print the device info to the console. As far as I can tell, there's no way to actually use that info to reconfigure.

from ofxpd.

OK, I've spent a bit more time with it and found a solution. Basically, I had to go into ofRtAudioSoundStream and add new methods that return the number of inputs/outputs for the default device. (I just used the listDevices() method as a model.) Then I extended the methods out to ofBaseSoundStream and ofSoundStream. Then I created a new instance of sound stream, got the number of default inputs and outputs from that instance, deleted that instance, and created a new functional sound stream using the correct number of I/Os.

ofSoundStream has the following methods:
getNumOutputChannels(), getNumOutputChannels()
but for some reason they returned extremely large numbers when I called them. Not exactly sure why.

Anyway, everything seems to working now. :)

from ofxpd.

Great. It might be worth opening an issue on the open frameworks core repo as that sounds like a bug to me, or at least functionality that should be there ... like being able to switch sound devices on the fly.

from ofxpd.

Will do. By the way, I think that you can set the device used by ofSoundStream by using the setDeviceID() method. The problem with that is that there doesn't seem to be a way to get device info other than printing it to the console. This would just require some new methods similar to what I just described. I will mention that too in the core repo issue.

from ofxpd.

p.s. I also just want to quickly mention that the number of buffers in ofSoundStreamSetup should be based on the number of channels—something I wasn't doing in the example above. As the documentation says:
"You should probably use two for each channel that youre using."

from ofxpd.

The issue described above will be resolved in PR#3247

from ofxpd.