The thing with amplitude dynamics and accordions (like this thing sort of resembles) is that there is variable amplitude control, but it’s not specifically tied to note onset (bellow pressure). The general topic of expanded dynamic control is one of the best areas of promise for alternative/novel midi controllers, (historically technological and marketing limits have kept most product offerings in electronic music interfaces bound to the piano-note “all-dynamics determined-at-onset” model). These days we’re seeing a ton of new approaches that break that mold though - there are two recently minted specifications that aim to address these shortcomings, MPE (midi polyphonic expression) and midi 2.0 (higher bit-depth messaging and bi-directional links), and lots of novel controllers that break away from the strictly piano paradigm.
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