Re: Emulate pc speaker in QEMU on MacBook Pro?

[Will Senn]

On 10/8/20 1:01 PM, Volker Rümelin wrote:
> Hi Will,
>
> > > > <name> is anything (it's an identifier in case you want to have multiple 
> > > > audiodevs).  For backend you probably want to use `coreaudio` on a Mac (sdl might be 
> > > > available too, I'm not sure, see the list under the -audiodev option).  So something 
> > > > like this:
> > > >
> > > >      -audiodev coreaudio,id=audio0 -machine pcspk-audiodev=audio0
> I expected you have working audio playback with these qemu command line 
> arguments. To exclude a problem with your guest please run 'Day 1 - F-Bird' 
> from the QEMU Advent Calendar 2018. I know this program uses the pc speaker.
Well, I thought you were pulling my leg, with the greek 'Day 1 - F-Bird' 
stuff, but a google search led the way to the Advent Calendar, and lo 
and behold, It works!

qemu-system-x86_64 -audiodev coreaudio,id=audio0 -machine 
pcspk-audiodev=audio0 -fda fbird.com


On the dos instance, no joy. Here's my runfile, does it look sane?

#!/bin/bash
qemu-system-i386 -machine isapc \
  -drive 
file=C.img,format=raw,if=ide,media=disk,readonly=off,index=0,cache=unsafe \
  -boot c \
  -audiodev coreaudio,id=audio0 -machine pcspk-audiodev=audio0 \
  -drive format=raw,file=empty1.img,index=0,if=floppy \
  -drive format=raw,file=empty2.img,index=1,if=floppy \
  -monitor telnet::2222,server,nowait -serial mon:stdio &
sleep 1
telnet localhost 2222

No beeping here. Next thing I'm going to try is running fbird from dos.

It's progress!

> > > > Thanks,
> > > > Zoltan
> > > Hi Zoltan,
> > >
> > > Thanks for the hint. I tried it and I didn't get any error, but I also don't 
> > > get any speaker sounds. How do I troubleshoot. I've got the monitor open and I 
> > > don't see any errors. Is coreaudio something native to my mac, or something I 
> > > need to install/configure and is audio0 the usual default device? Sorry if this 
> > > sounds newbieish.
> > >
> > > Thanks,
> > >
> > > Will
> > I spoke to soon. As soon as I quit the monitor, an error was displayed:
> >
> > coreaudio: Could not lock voice for audioDeviceIOProc
> > Reason: Invalid argument
> Did this error message appear after you typed quit in the monitor? Then it's a 
> bug in the qemu coreaudio shutdown routine and you can ignore this message.
Yes, it came after. No worries, I'm going to fiddle with this.


> With best regards,
> Volker


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