max 6 on icecast-server | audio driver question

hello, iam using max 6.0.8 on a windows-icecast-server.
the server has probably no physical soundcard. so the question is if there is a virtual/ dummy audio
driver that i can use to generate audio with max on windows-icecast-server?
or is there a special configuration with one of the standard max audio drivers that works out of the box?

thanks for help, johannes