tag	line	file	source code
BASE_OCTAVE	1998	drivers/sound/sequencer.c	if (octave < BASE_OCTAVE)
BASE_OCTAVE	1999	drivers/sound/sequencer.c	note_freq >>= (BASE_OCTAVE - octave);
BASE_OCTAVE	2000	drivers/sound/sequencer.c	else if (octave > BASE_OCTAVE)
BASE_OCTAVE	2001	drivers/sound/sequencer.c	note_freq <<= (octave - BASE_OCTAVE);