Hi.
today DU breaks sound on my amd64.
libasound2:amd64 (1.1.6-1, 1.1.7-1),
libasound2-data:amd64 (1.1.6-1, 1.1.7-1),
libasound2-dev:amd64 (1.1.6-1, 1.1.7-1),
libasound2-plugins:amd64 (1.1.6-1+b1, 1.1.7-1)
Downgrade to the packages from testing solved that problem.