In spite of having longer tracks its more than likely that a track gets played at two or more times during a match, for this is important that the end and beginning of the track can be matched without disruptions, giving a sense of continuity.
+For this the ideal way is to find a start and end sample index, so that that region is perfectly (clickless) loopable. These can be set as LOOP_START and LOOP_END tags in the Vorbis file, and the engine will seek back to LOOP_START when reaching LOOP_END.
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h3. Complexity
As this game is extremely fast we don't want to have overly complex tracks at the point of being distracting or that one can't even understand while playing (e.g. a mad breakbeat tune)