The tempo map has a major deficiency compared to the other envelopes, namely that two (differently valued) envelope points cannot be inserted at the same time point.
This limitation cannot be due to any difficulties in calculating abrupt changes in tempo, since square-shaped points per definition involve such abrupt changes.
One example of the bugs caused by this limitation is that moving or copying Regions often leads to undesired and unintended changes in the tempo map. Regions always try to insert new envelope points at their boundaries when they are moved or copied, in order to preserve the shape of the pre-existing envelope. This works well in all envelopes except the tempo map:
The user can try to use hordes of square points to replace the linear ramp, but this leads to a clutter of tempo markers that is not only unsightly, but also conceals actual time signature changes. (Which of course leads to the Feature Request in my signature, and to hve's request for separate tempo and time signature envelopes.)
This limitation cannot be due to any difficulties in calculating abrupt changes in tempo, since square-shaped points per definition involve such abrupt changes.
One example of the bugs caused by this limitation is that moving or copying Regions often leads to undesired and unintended changes in the tempo map. Regions always try to insert new envelope points at their boundaries when they are moved or copied, in order to preserve the shape of the pre-existing envelope. This works well in all envelopes except the tempo map:
The user can try to use hordes of square points to replace the linear ramp, but this leads to a clutter of tempo markers that is not only unsightly, but also conceals actual time signature changes. (Which of course leads to the Feature Request in my signature, and to hve's request for separate tempo and time signature envelopes.)
Tempo map: Cannot insert two envelope points at same time point
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