via http://www.aep-emu.de/

The NES emulator HalfNES has been updated to version 0.0.40.

Quote:
0.040 (10/17/2011)
  • Added Mapper 68 (Afterburner and Afterburner II)
  • Monkeyed around with the audio code, MMC5 sound channels had the wrong pitch and audio was clipping at full volume. Both of those should be fixed.
  • Also fixed sound popping when pausing and unpausing.

And in the time it took me to do that byuu made in a week what took me a year. eh.