System-Level MIDI Performance Testing

We describe a new approach for testing MIDI performance characteristics, which is both inexpensive and highly accurate. Following a description of the test method, actual results for a number of MIDI interface technologies are presented. These results show that jitter and latency performance of newer (USB-based) interfaces is actually two to three times worse than older MIDI interface technologies. Other potential applications of this technique are briefly discussed. Finally, we consider implications for the future, since the recent PC2001 Guidelines and WHQL (Windows Hardware Quality Labs) logo requirements will forbid the use of the older MIDI interface technologies in new personal computer designs.