For context, please see this conversation.
The feature I am requesting would be a new entry in the little “lock” menu next to the semitone transposition button in Section A. Currently this menu has the options Maintain Current Scale, Maintain Current Tonic, and Force Into Scale.
I expected “Maintain Current Tonic” to auto-transpose the selected chord progression to the selected tonic (just like using the ST: button to transpose it by the right number of semitones, but automatic as you switch songs/artists). What it actually does is leave the sound of the chord progression unchanged but present the chords “in terms of” the other scale. (E maj is still E maj, but now it’s the V chord instead of the I chord.)
A good example is the Alternative 1 (A min) and Alternative 2 (E maj) songs. First listen to both song progressions to hear how they sound normally. Now go to Alternative 1 and pick one of the “lock” modes, then switch to Alternative 2. If you used “Maintain Current Tonic”, Alternative 2 will sound exactly the same as it did when the “lock” was OFF, but all the chord labels will change. Now transpose it down 7 semitones to A major and listen - this is what I expected “Maintain Current Tonic” to do.
Could we have another option in this menu that does the auto-transposition as you browse through different songs?