More > JRiver Media Center 31 for Mac
Bluetooth crackles on MC31 (and 29)
bob:
--- Quote from: domhnall on July 20, 2023, 07:13:42 pm ---Thanks for your reply! The integer mode was off, but the "open device w exclusive access" was checked. I unchecked it. I still got static on bluetooth playback. I then restarted MC, and when that didn't work, I restarted the computer, thinking that might help the change to take effect.
Now, unfortunately, playback on bluetooth doesn't work at all. I get an error message saying that playback could not be started on the core audio output (neither the bluetooth speakers nor the bluetooth headphones) using format "48kHz 2 ch." It does play when I use the built-in speakers for the Macbook (without static).
The output settings are still set to 48kHz, which I thought they had to be.
--- End quote ---
Note that you can select the device either in MC's audio settings or in the finders audio output chooser if you are defaulting to core audio in MC.
If neither of those work, please turn on logging and attach a log. The audio device open is logged heavily.
domhnall:
Sorry -- when I said playback could not be started on the core audio output, that's what the message said. It "could not be started on the output 'Core Audio' using the format 48 kHz 2ch." The selected output under Audio>Audio Device is "Bluetooth Speaker [Core Audio]" or "Headphones [Core Audio]." The Bluetooth speaker is also selected in the Mac's settings for Sound.
I've attached a log in which I tried and failed to play a file via bluetooth.
bob:
According to the log, the device only supports 16k or 44.1k so try setting your DSP studio to 44.1k
domhnall:
That worked! The crackling is gone too -- thank you so much!
blgentry:
For quite some time, 48kHz has been the normal sampling rate for the vast majority of Bluetooth devices. I think this is set by the end point device. I.E., the actual headphones or bluetooth speakers. I'm pretty sure that the Bluetooth sender (I.E. the MacBook Pro) can send any sampling rate in the Bluetooth standard.
In my experience it is extremely unusual to find a 44.1kHz bluetooth device.
Would you mind sharing with us the make and model of your 44.1kHz bluetooth device? I'm just curious about it since it's outside of my experience.
Thanks,
Brian.
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