Re: Audio playback speed issue on sam460ex and pegasos2

[Volker Rümelin]

Am 28.03.23 um 16:37 schrieb Rene Engel:
> Sorry I was on the wrong branch.
> I forget that every time, however that is trace test performed with ac97 under 
> Pegasos 2 Emulation with AmigaOs4.1, startsound played and an mp3 with TuneNet.
>
> audio_open_out 0.000 pid=8358 card=b'via-ac97' name=b'via-ac97.out' freq=0xac44 
> fmt=b's8' ch=0x1
> audio_open_info_out 52921.000 pid=8358 end=b'sw' card=b'via-ac97' 
> name=b'via-ac97.out' freq=0xac44 ch=0x1 bits=0x8 is_signed=0x1 is_float=0x0
> audio_open_info_out 0.000 pid=8358 end=b'hw' card=b'via-ac97' 
> name=b'via-ac97.out' freq=0xac44 ch=0x2 bits=0x20 is_signed=0x1 is_float=0x1
> audio_open_out 1019.000 pid=8358 card=b'via-ac97' name=b'via-ac97.out' 
> freq=0xac44 fmt=b's16' ch=0x2
> audio_open_info_out 2.000 pid=8358 end=b'sw' card=b'via-ac97' 
> name=b'via-ac97.out' freq=0xac44 ch=0x2 bits=0x10 is_signed=0x1 is_float=0x0
> audio_open_info_out 0.000 pid=8358 end=b'hw' card=b'via-ac97' 
> name=b'via-ac97.out' freq=0xac44 ch=0x2 bits=0x20 is_signed=0x1 is_float=0x1
> audio_fe_frames_out 130352.000 pid=8358 fe_free=0x800 fe_written=0x372
> audio_hw_frames_out 2.000 pid=8358 hw_free=0x800 hw_written=0x372
> audio_fe_frames_out 10265.000 pid=8358 fe_free=0x68e fe_written=0x372
> audio_hw_frames_out 1.000 pid=8358 hw_free=0x68e hw_written=0x372
> audio_fe_frames_out 11159.000 pid=8358 fe_free=0x51c fe_written=0x372
> audio_hw_frames_out 1.000 pid=8358 hw_free=0x51c hw_written=0x372
> audio_fe_frames_out 10211.000 pid=8358 fe_free=0x3aa fe_written=0x372
> audio_hw_frames_out 0.000 pid=8358 hw_free=0x3aa hw_written=0x372
> audio_fe_frames_out 10522.000 pid=8358 fe_free=0x238 fe_written=0x238
> audio_hw_frames_out 1.000 pid=8358 hw_free=0x238 hw_written=0x238
> audio_fe_frames_out 10122.000 pid=8358 fe_free=0x200 fe_written=0x13a
> audio_hw_frames_out 0.000 pid=8358 hw_free=0x200 hw_written=0x13a
> audio_fe_frames_out 10541.000 pid=8358 fe_free=0x2c6 fe_written=0x2c6
> audio_hw_frames_out 0.000 pid=8358 hw_free=0x2c6 hw_written=0x2c6
> audio_fe_frames_out 10366.000 pid=8358 fe_free=0x200 fe_written=0xac
> audio_hw_frames_out 0.000 pid=8358 hw_free=0x200 hw_written=0xac
> audio_fe_frames_out 10582.000 pid=8358 fe_free=0x354 fe_written=0x354
> audio_hw_frames_out 1.000 pid=8358 hw_free=0x354 hw_written=0x354
> audio_fe_frames_out 10111.000 pid=8358 fe_free=0x200 fe_written=0x1e
> audio_hw_frames_out 0.000 pid=8358 hw_free=0x200 hw_written=0x1e
> audio_fe_frames_out 10367.000 pid=8358 fe_free=0x3e2 fe_written=0x372
> audio_hw_frames_out 1.000 pid=8358 hw_free=0x3e2 hw_written=0x372
> audio_fe_frames_out 10129.000 pid=8358 fe_free=0x270 fe_written=0x270
> audio_hw_frames_out 1.000 pid=8358 hw_free=0x270 hw_written=0x270
> audio_fe_frames_out 10204.000 pid=8358 fe_free=0x200 fe_written=0x102
> audio_hw_frames_out 0.000 pid=8358 hw_free=0x200 hw_written=0x102
> audio_fe_frames_out 10656.000 pid=8358 fe_free=0x2fe fe_written=0x2fe
> audio_hw_frames_out 1.000 pid=8358 hw_free=0x2fe hw_written=0x2fe
> audio_fe_frames_out 10363.000 pid=8358 fe_free=0x200 fe_written=0x74
> audio_hw_frames_out 1.000 pid=8358 hw_free=0x200 hw_written=0x74
> audio_fe_frames_out 10436.000 pid=8358 fe_free=0x38c fe_written=0x372
> audio_hw_frames_out 0.000 pid=8358 hw_free=0x38c hw_written=0x372

Hi Rene,

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?

The default for out.frequency is 44100.

With best regards,
Volker

> --- Ursprüngliche Nachricht ---
> Von: Volker Rümelin <vr_qemu@t-online.de>
> Datum: 27.03.2023 21:12:42
> An: Rene Engel <ReneEngel80@emailn.de>
> Betreff: Re: Audio playback speed issue on sam460ex and pegasos2
>
> > Am 27.03.23 um 16:21 schrieb Rene Engel:
> > > I compiled the build from their git branch and enabled the audio trace,
> > but with this option the AmigaOs4.1 workbench does not start anymore and
> > stops with a load sign. Tested with ac97 it almost looks like the ac97 part
> > that used to stop AmigaOs4.1 is not included in your build.
> > > This is the command line I used:
> > >
> > > reneengel@Mac-Studio build % cd /Users/reneengel/qemuVolkerAudioPatch/build
> > > reneengel@Mac-Studio build % qemu-system-ppc -L pc-bios -M pegasos2
> > -bios /Volumes/BackUP/PegasosQemuDatein/pegasos2.rom -vga none -device sm501
> > -drive if=none,id=cd -m 1024 -device ide-cd,drive=cd,bus=ide.1 -drive 
> > if=none,id=hd,file=/Volumes/EXTREME\
> > SSD/hd1.img,format=raw -device ide-hd,drive=hd,bus=ide.0 -device 
> > rtl8139,netdev=network00
> > -netdev user,id=network00 -rtc base=localtime -display cocoa -serial stdio
> > -smp cores=1 -trace "audio_open*_out" -trace "audio_*_frames_out"
> > -trace file=/tmp/qemu-trace
> >
> > Is the current directory included in the macOS search path? On my Linux
> > system qemu-system-ppc starts the installed QEMU executable. I have to
> > use ./qemu-system-ppc to start the program from the build directory.