The ProTrack's independent gain-setting dials for the left and right channels are a little touchy. They often produced off-balance stereo recordings if the dials weren't precisely aligned. For podcast-style recording using external mics, however, the independent dials came in handy for quick adjustments.
Like any iPod accessory, the ProTrack's capabilities are hampered by the recording limitations of the iPod. The maximum recording resolution, as dictated by the iPod, is 16-bit/44KHz. A lower-quality 16-bit/22KHz option is available using the iPod's settings, but you won't find any options for recording directly to MP3.
The left side of the Alesis ProTrack includes switches for power, iPod charging, and phantom-microphone power. There's also a latch for releasing the included plastic faceplate, and a power adapter input.
One of the more impressive features on the ProTrack is the pair of stereo-condenser microphones poking out from the top. These mics are permanently arranged in an X-Y recording position, and are protected by a metal wire brace.