sampleRate is 0 with Mac Mini M1

General JUCE discussion
1

I am implementing a host / standalone app.
When I create the AudioIODeviceCallback, I get a sample rate of 0 in the audioDeviceAboutToStart().
The AudioIODevice is juce::CoreAudioClasses::AudioIODeviceCombiner

I debugged into the juce::CoreAudioClasses::AudioIODeviceCombiner::start() and can see there that the getAvailableSampleRates() returns an empty array.
The output is functional, but the samplerate is always 0 which screws up my pipeline (and prevents me fro using the MidiInputCollector).

I am opening two input and two output channels:

deviceManager.addAudioCallback (&outputMatrix.getCallback());
deviceManager.initialiseWithDefaultDevices (2, 2);

The same code works flawless with my UAD Apollo attached.

I checked with the last 6.1.6 commit as well as the latest 7.0.0.

2

I completely forgot that I have a USB webcam connected to the Mini. When I remove that, it works as expected.
Seems the AudioIODeviceCombiner fails to return the samplerate it combines to. This samplerate should always be included in getAvailableSampleRates().

3

Slight bump.

Would be good to get a valid sample rate when having a webcam connected (AudioIODeviceCombiner).

4

This issue is now addressed on develop. Thanks for the report

1 Like
5

Just tested, it solves my issue here. Thanks @attila !

1 Like
6

Out of curiosity, what was the model and manufacturer of the webcam?

7

Oh yeah, I forgot. The probably cheapest possible. They didn’t even bother making a company name up :wink:
Screenshot 2022-09-21 at 10.39.38

The internet finds them under the vendor ID as Man & Machine Inc. / man-machine.com
Not sure how accurate that is, they don’t look like doing 15 bucks cameras on their website…

1 Like