I have adjust tempo mapped to an expression pedal. I can set a maximum and minimum tempo with absolute values.
I would like the ability to set maximum and minimum percentages or Plus/Minus values - relative to the source tempo of a project.
Example:
I record a loop.
It is 100bpm.
I push pedal to 100% Tempo changes to 120.
I pull pedal to 0%. Tempo changes to 80bpm.
New project
I record a loop.
It is 150bpm.
I push pedal to 100%. Tempo changes to 170bpm.
I pull pedal to 0%. Tempo changes to 130bpm.