The UTM Thread

[Bruninho]

I ran a couple of more tests on the qemu-system-m68k in UTM and with MacOS 8.1, same site and video.

Audio came out on all outputs even the bluetooth. So its just a qemu-system-ppc screamer issue, me thinks.

[adespoton]

So here is the thing, I ran a couple of tests. First I restored a backup of my VM. My tests have shown that the problem is the chosen mac sound output.

When I use the external monitor (a LG 4K 32" TV) the sound comes out from it just fine. I tested using a video on cornica.org of Steve Jobs unveiling the Mac 128K. I can hear him talking just fine. As well as some of the OS 9 sound effects (like, navigating the dropdown menus does a "ploc" like sound?).

Then when I use the speakers of my own MacBook Pro (M4 Pro), the sound also comes out just fine from the same tests. But when I use what I really want to use, the bluetooth audio, there is no sound.

I am hearing impaired, so I use a Cochelar Nucleus 8 hearing aid, the latest model from Cochlear Americas, which is MFi certified (Made For iPhone), therefore it pairs with my Mac and iPhone directly, no other bluetooth device required. I use it to listen to songs and youtube videos on my host mac just fine. It's just UTM that is not working well with any bluetooth output audio, apparently.

I also ran two more tests. I have a dock with extra ports. When I plug a headphone jack on it, no audio too. But if I plug the headphone jack directly on my Mac, there is audio to my headphones. For now, thats the only way to get audio in a private environment without disturbing people around me. If we ignore the dock issue, I think UTM has an issue with outputting audio to bluetooth audio devices.

Have you tried routing through Blackhole? I suspect (but haven't tested yet) that UTM's now using USB Audio, and Bluetooth Audio isn't presented as a USB Audio device. But you should be able to redirect USB audio (or UTM audio) out via Blackhole to your Bluetooth device of choice. I always use Blackhole when I don't get the audio I'm expecting from an app.

[Bruninho]

no, I have never heard of blackhole.

but honestly I dont want to mess with my current audio configuration because it now works fine with microsoft teams for my current remote work.

The new hearing aid with direct bluetooth is the main reason why I got it, because the old one was really outdated and needed a bluetooh microphone to be able to pass audio to my hearing aid for the teams calls and it frequently had issues. now I no longer have these issues on microsoft teams... I think its just an issue with UTM's PPC screamer, the other archs work fine.

[Cat_7]

The last screamer source code compiled on qemu 9.1. It will not compile on Qemu 10. So if UTM has been updated to that I assume the screamer will no longer work.
However, recently -device usb-audio has been fixed for Mac OS 9.x so perhaps (when/if UTM supports USB for Mac OS 9.x?) you get your sound back when it is updated to Qemu 10.2.

Best,
Cat_7