Best Qemu setting for audio in emulated NetBSD current

MG_

I'm trying sound with the game xgalaga on Qemu-x86_64 running on FreeBSD 12.3
Options -device AC97 and -device es1370 show a actual device but seem to cause sort of a conflict resulting in unstable sound support with seconds delay. It even continues to play while the game is already closed.
Options -device sb16 doesn't show a virtual sound device and -device hda results in full freeze when the game starts.

Any ideas? I have a M.2 disk that is able to boot NetBSD current for real or via Qemu. It would be nice if both have sound support.

nia

-device sb16 emulates an ISA card I think. Probably only good with really old operating systems like MS-DOS! Maaaybe NetBSD/i386. Both ac97 and es1370 are very reasonable devices to enable, with ac97 being the marginally more modern option. I would recommend something like -audiodev oss,id=oss,out.dev=/dev/dsp,in.dev=/dev/dsp -device ac97,audiodev=oss.

A good test on NetBSD is audiocfg test 0. Make sure the beep is continuous, with no gaps in the playback. If it sounds choppy, try raising the sysctl variable hw.audio0.blk_ms like chap-virt in the NetBSD guide suggests. Note this increases latency and makes it harder for the sound to be synced with any video!

Using QEMU on FreeBSD to run x86 guests is probably a "weird" choice. While it'd make perfect sense to use QEMU on NetBSD, on FreeBSD QEMU is unaccelerated and it'll be chewing your CPU up a lot, especially playing a game. Can I ask why not something like VirtualBox?

MG_

nia

After trying different things, I have mpg123 playing a mp3-file correctly. Appaprently, there's still a problem with xgalaga, which delays everytihing with +/- 8 seconds. It uses the dsp device but it may contain deprecated audio code.

current script to start NetBSD oin Qemu:

qemu-system-x86_64                                         \
-hda /dev/nvd1                                             \
-net nic                                                   \
-net tap,ifname=tap0                                       \
-vga cirrus                                                \
-smp 4                                                     \
-m 16G                                                     \
-device ac97,audiodev=oss                                  \
-audiodev oss,id=oss,out.dev=/dev/dsp,in.dev=/dev/dsp
# Why does this block show black on white text?

I'm using Qemu for it's many options. Currently, I have FreeBSD and NetBSD installed on 2 different physical drives. They are able to boot eachother emulated with the same parameters except the drive name. . I still have to find out how the acceleration in NetBSD works. The FreeBSD system is still way faster. I upgraded NetBSD 9.3 to current from within Qemu for the 2.5Gbit Realtek network driver. Took 1 night but no problems at all.