This command displays performance statistics. The statistics are reset every time playback is started.
| Total Callbacks | The total number of MIDI callbacks that have occurred. |
| CB Underruns | The number of underrun errors that have occurred. |
| CB Latency | The desired callback latency in milliseconds and ticks. |
| Min CB Time | The minimum callback duration, in time and as a percentage of the latency. |
| Max CB Time | The maximum callback duration, in time and as a percentage of the latency. |
| Avg CB Time | The average callback duration, in time and as a percentage of the latency. |
If underrun occurs, the maximum callback length will exceed the callback latency. To avoid underruns, increase the latency so that it's well above the maximum callback length.