It's not my driver. It's Undisbeliever's. Though I did contribute somewhat, more on the conceptual side of things than the actual code, in addition to being one of the earliest users of the sound driver other than the developer himself (since v0.0.2ish: I failed to compile the original release, but it was repaired as the first commit afterwards, and my first song that I submitted to the site used v0.0.3). It was originally 6 music channels with two SFX channels: now it's 8 music channels with 2 SFX that can overlap the last two channels.