Transpose by semitone should be enabled in repitch mode and Bitwig should automatically lengthen or shorten the audio as needed.
What problem(s) would this feature resolve?
Not being able to re-pitch audio by exact semitones
How does this feature fit in Bitwig as a product?
The buttons already exist but are grayed out.
Is there already an alternative way to achieve this on Bitwig?
You can change the pitch by adjusting the tempo of the audio, but in order to get exact semitones you need to perform math calculations every time.
Could it be implemented using Bitwig components or APIs, without Bitwig team’s support?
No
Could it be provided by an STV or something else reasonably integrated with Bitwig?
No
Are there other products that offer this feature?
Ableton Live