Hi. I just reinstalled DPS per your instructions. The volume issue seems resolved – at least with iTunes. However, the menu bar icon is highlighted in blue. And stays highlighted. Then when you quit DPS, the icon disappears from the top ‘menu bar’.
I am having big problems with Mavericks and DPS: Volume control doesn’t work. Audio cuts in and out. This happens on iTunes and Youtube. Also, when I try to turn DPS on and off, it freezes, and I have to quit DPS.