Hi Ralf,

Thanks for taking time to reply. Regarding the April fool hoax, I am not sure I understood what was obviously suspicious (thanks to my ignorance). I do have a Mountain Lion MacOS setup on Oracle Virtualbox VM running on my Linux host, alas with no sound. Sound was one of the few remaining problems that I couldn't fix, but I thought it to be more because of a working kext that is compatible with the emulated (even crappy) sound device (s.a. SB10 or intelHDA... although I don't think IntelHDA is that bad for say amateur home-studio work).

The Windows 10 guest VM is able to render sound alright (from a browser), so audio out didn't seem to be too much of an issue. Hadn't attempted recording in the guest yet. The 3 applications (requiring audio in-out) I had in mind for Windows guest were:

1. Mobius looper - It requires audio in/out and MIDI in (for foot-switch controls). This software is available only for Windows and Mac. Yet to try with Wine.

2. Skype for Business - Currently I am using SfB Android application on a super-slow Android VM on Virtualbox, apart from it being feature-crippled. I need it to join my office call from my home PC. Wanted to see if I could use the fully feature Windows client in in Windows10 guest. Tried without success on Wine.

3. Guitar Rig5 - Cab/Amp modelling, effects. I've used Guitarix and Rakarrack, but miss the arguably better modeling that GR5 offers. Tried without success on Wine.

The MIDI input to the VM would be using serial-over-USB from an Arduino based DIY foot-controller that encapsulates MIDI over serial (over USB). I've done some microprocessor and single board computer development on VM, I know that the serial ports work reasonably well in VMs.

regards,

On Sat, Aug 10, 2019 at 2:37 PM Ralf Mardorf <ralf.mardorf@alice-dsl.net> wrote:

Hi,

what kind of audio apps do you want to run in a Windows guest?

Usually it's vice versa, audio software does work when running it under
wine, but does not work, when running it in a Windows guest, since
Linux does access the hardware and provides the drivers.

Usually a virtual machine provides to chose between a few audio
device emulations and has got a bridge to the Linux host to access the
real sound card via ALSA, OSS or a sound server. This does mean, that
Windows does access a faked (virtual, emulated) crappy sound card and
not the real sound card.

I don't know if there even is a way to get a bridge for MIDI, maybe by
enabling serial ports.

Btw. an April fool hoax does address this issue:

https://lists.ubuntu.com/archives/ubuntu-users/2019-April/296577.html

Regards,
Ralf