tone_synth object
This method rewinds the cursor to a previous position.
bool rewind(double beats)
Parameters:
beats
Number of beats to rewind.
Return value:
true on success, false on failure.
Remarks:
Rewinding is useful if you want to go back to a certain position relative to where the cursor is at present.
Example:

    // Write a chord, two melody notes, then rewind to add some more.

    tone_synth synth;

    void main()
    {
    synth.tempo=120;
    synth.waveform_type=2;
    synth.note("C4", 4);
    synth.note("E4", 4);
    synth.note("G4", 4);
    synth.waveform_type=3;
    synth.note("C5", 2);
    synth.rest(2);
    synth.note("C6", 2);
    synth.rewind(1.333);
    synth.note("E5", 0.666);
    synth.rest(0.666);
    synth.note("G5", 0.666);
    synth.rest(0.666);
    synth.write_wave_file("synth.wav");
    }