void Synthesize()
{
    BYTE t;
    if ( noteCounter >= controls.Beat )
    {
        // Reset note counter
        noteCounter = 0;
        // Reset time counter
        timeCounter = 0;
        // Process buttons press events
        ...
        // Read knob potentiometers
    ...
        // Generate new musical score measure
       GeneratePattern();
    }
    else
    {
        // Increase time counter
        timeCounter++;
        // Reset time counter
        if ( timeCounter >= noteDuration )
        {
            timeCounter = 0;
            noteCounter++;
        }
    }
    // Synthesize actual music
    doSynth();
}

Example 2: Synthesis code.