[LAU] KVM virtual machines and jack

[Reuben Martin]

On Sun, Dec 6, 2009 at 4:14 AM, Patrick Shirkey
<pshirkey at boosthardware.com> wrote:
>
> On 12/06/2009 03:20 PM, Reuben Martin wrote:
>> On Sat, Dec 5, 2009 at 8:39 PM, Paul Davis<paul at linuxaudiosystems.com>  wrote:
>>
>>> On Sat, Dec 5, 2009 at 2:51 PM, Reuben Martin<reuben.m at gmail.com>  wrote:
>>>
>>>> Does anybody know if it is possible to run a guest OS under KVM and
>>>> have the ins and outs of the virtual audio device presented to that
>>>> OS, interface with JACK on the host linux system?
>>>>
>>>> I've done a little googling on this but couldn't find anything.
>>>> (mostly because "jack" is ambiguous, and "KVM" can mean a lot of
>>>> things)
>>>>
>>> unless the VM software that provides fake audio devices to the guest
>>> OS knows about JACK internally or can be configured to use it, this is
>>> not happening.
>>> on the other hand, if the VM software can simply use the ALSA JACK
>>> plugin, that could potentially work (lots and lots of latency though).
>>>
>>>
>> In that case I guess my best bet would probably be to petition KVM
>> development to add support for JACK. Currently I believe it supports
>> ALSA, OSS, SDL and PulseAudio.
>>
>>
>
> If KVM already supports those api's then it can  be used with jack via
> several different methods. What is the problem that you are having exactly?
>

No problems yet. I'm putting together a new system and had thought of
using Windows and Mac as guest VM systems under KVM for running things
that don't exist for Linux and/or don't work well with WINE. And I
wanted to see if anybody had tried routing the VM audio ins / outs to
JACK rather than directly to an audio sink.

Wanted to see if anybody had seriously tried this before I gave it a go.

-Reuben