| DirectX SDK |
| Track type | Tempo. |
| Purpose | Set or retrieve the tempo. |
| Data type (*pParam) | DMUS_TEMPO_PARAM. For SetParam, the mtTime member of the structure is ignored. For GetParam, the mtTime member receives the offset of the tempo change from the requested time and is always 0 or less. |
| mtTime | The time, in track time, at which to set the tempo, or the time at or directly after the tempo change to retrieve. |
This topic pertains only to applications written in C++.