I can reproduce this on Windows 10 (64bit) with hda device. Host kernel is 4.1.13-rt15-1-rt, also tried with non-realtime kernel with same results.
Output works without delay, given it is choppy from time to time. Using the following env vars when starting QEMU: QEMU_AUDIO_DRV: pa QEMU_PA_SAMPLE: 32 # also tried with 128, 256, 512 and 1024. Same results for input, output got less choppy but with notable latency QEMU_PA_SERVER: unix:/run/user/1000/pulse/native # where user with uid is the user with Xorg and PA session, of course. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1492649 Title: QEMU soundhw HDA huge microphone lag Status in QEMU: New Bug description: I use a Windows 7 x86_64 guest with VGA passthrough and -soundhw hda. The audio plays fine, but the microphone input is delayed by more than 20 seconds. -soundhw ac97 does not have this delay but it has choppy sound playback and input. System: Arch linux Kernel: 4.1.6-1-ARCH Audio hardware: 00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller Audio system: Pulseaudio 6.0 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1492649/+subscriptions