The waiting is over!
At least if you have a spare of Brendan's double chromatics lying around. Simply retune it to the following:
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Button 1+2: Blow: ab b d f ab b d f Draw: c eb gb a c eb gb a Button 2: Blow: bb c# e g bb c# e g Draw: c# e g bb c# e g bb No button: Blow: c eb gb a c eb gb a Draw: d f ab b d f ab b Button 1: Blow: d f ab b d f ab b Draw: eb gb a c eb gb a c
Behold the fantastic properties:
- With no button pushed, this is your trusty old Dimi tuning, capable of chromatic playing with bends alone.
- Every note has an enharmonic that can be raised by a full step or a half step by the push or release of a single button. Diatonic trills in any key!
- Every note appears as a bendable draw note, for expression!
- Every note can be played as a controllable full bend!
Now... I realise this might not be all that practical and the above description is quite tongue-in-cheek. Mainly, I wrote to post it to show that something like an all-key slide diatonic is actually (at least in principle) possible.
After writing it up up, however, I can't help to look at all the bending opportunities and let the mind wander. It's actually kind of neat, isn't it?