Re: Audio playback speed issue on sam460ex and pegasos2

[BALATON Zoltan]

On Tue, 28 Mar 2023, Volker Rümelin wrote:
> it seems your Mac uses a 48kHz sample rate, although QEMU requested a 44.1kHz 
> sample rate. Could you add -audiodev coreaudio,id=audio0,out.frequency=48000 
> to your command line and test if the playback speed and pitch is now correct?

I guess you could also set the sampling rate in the guest to match the 
host but if that results it to do resampling then it may use more CPU that 
way.

> The default for out.frequency is 44100.

I think ALSA and Pulseaudio may also default to 48kHz. I remember 
configuring ALSA to 44.1 kHz on my machine to avoid resampling in the more 
common case of playing music. So is this a general problem or something 
with the coreadio backend? Should this somehow detect the host sampling 
rate and do something about it?

Regards,
BALATON Zoltan