Set smoothing mode to enable attack/decay settings
Set smoothing mode to enable attack/decay settings

git-svn-id: 6b7e1e5d0861e268462ba7828ef63c1bcab52a9b@677 d3cde5d6-82b8-4669-8b62-43054d6781d8

cgommel/sdrsharp,periloso/sdrsharp