Adding more than 1 virtual audio device

Hello,
In addition to being able to add virtual NIC, printers, hard disks, CD, serial ports to a VM I think it would be great to be able to add virtual audio interfaces to a VM. Used in addition to Soundflower/Rogue Amoeba's Loopback this would allow to do some audio processing on the Mac and send it back to the VM.

It's important to note that Virtual Audio Cable (which was a great tool to create multiple virtual audio interfaces) is not compatible with Windows for ARM yet.