kern/164220: sound preferences does not allow continuous adjustment of mic level

[linimon at FreeBSD.org]

Synopsis: sound preferences does not allow continuous adjustment of mic level

Responsible-Changed-From-To: freebsd-amd64->freebsd-bugs
Responsible-Changed-By: linimon
Responsible-Changed-When: Sun Jan 22 23:30:02 UTC 2012
Responsible-Changed-Why: 
Please tell us what sound card and app you are using so that we may
classify this PR.

http://www.freebsd.org/cgi/query-pr.cgi?pr=164220