gistfile1.cpp

int fromPPQ15360TicksToSamples (int ticks, int tempo, int sampleRate)
{
    // ticks -> samples
    // 3.9025 = 60000 (milliseconds / min) / 15360 (ticks per quarter note)
    return (3.9025 * sampleRate * ticks) / (double)tempo;
}

int fromSamplesToPPQ15360Ticks (int sampleOffset, int tempo, int sampleRate)
{
    // samples -> ticks
    // 3.9025 = 60000 (milliseconds / min) / 15360 (ticks per quarter note)
    return (sampleOffset * tempo) / (3.9025 * sampleRate);
}