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48938: Play Low Tone
Used by the routines at TestOrchidTouched, ScoreLabelFlash and EnterInitials.
Plays a steady tone of 16 cycles, using 128 as the pitch delay (so it is lower in pitch than PlayHighTone).
PlayLowTone 48938 LD BC,32784 Set the half-period in B to 128 and the number of cycles in C to 16.
48941 JR PlayWaveSequence Jump to PlayWaveSequence to play the tone.
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