On Mon, 7 Dec 2020 at 13:56, kazusanosuke_kaz <kazusanosuke_...@yahoo.co.jp> wrote: > > Hi, all! > > I've just installed qemu to my PC, Windows 8.1(x64) with Core i5-4670 / MSI > MS-7817(OnBoard Sound) / GeForce GT 640 > Windows 98SE was successfully installed on qemu, but sound device doesn't > work ... > > "C:\Program Files\qemu\qemu-system-i386.exe" -device sb16 -m 512 > Windows98SE.qcow2 > dsound: Could not initialize DirectSoundCapture > dsound: Reason: No sound driver is available for use, or the given GUID is > not a valid DirectSound device ID
(I don't use Windows, but here are some suggestions based on reading the source code.) > Even though I choose another soundhw, the result is all the same That's because this error message is not related to what sound hardware is being given to the guest. It's the QEMU DirectSound audio backend complaining that when it asked the host Windows for a sound-input device (ie a microphone or similar) it got an error back. (Specifically, the IDirectSoundCapture_Initialize() call failed.) So the warnings are basically saying "sound input to QEMU is not going to work", and they'll be printed for any kind of sound hardware you give to the guest (sb16, ac97, ...). That said, looking at the code I think that the DirectSound backend attempts to continue even if audio input doesn't work. So if you only care about audio output, in theory these warnings should be harmless. You could try some of the suggestions in this stack overflow post: https://stackoverflow.com/questions/55601413/how-to-fix-could-not-initialize-directsoundcapture-in-android-studio (effectively "plug in a microphone" or "enable some windows-internal input device") to see if they help. If that makes the warnings go away and also makes sound output start working, then there might be a bug in the QEMU code that is supposed to handle "input doesn't work but proceed with output anyway". If the warnings go away but sound output still doesn't work, then the output problem is not related to the warnings. thanks -- PMM