The Gran Vals by Francisco Tárrega, while being a gentle and fairly simple waltz, has achieved the distinction of being the most oft-heard piece of music ever written. At its peak, a four-measure excerpt from this work was being heard nearly 1.8 billion times per day, or 20,000 times per second.
- E-Flat Clarinet (or A-flat Clarinet)
- 4 B-Flat Clarinets
- Alto Clarinet/Basset Horn (double Clarinet 4)
- Bass Clarinet
- Contrabass Clarinet/Contralto/String Bass (double Bass Clarinet)