Striso board firmware v2.1.3 - 2021-12-02

Striso board firmware v2.1.x has an improved button read algorithm, which for optimal functioning needed some hardware changes (hardware rev1, with small black buttons). It does work with rev0 hardware too (small white buttons), where crosstalk between buttons is much reduced, though the signals are a bit more noisy. Feedback welcome!

To update your Striso board, connect the USB cable with the settings (square) button pressed, now it should attach as a flash drive. To update the firmware just copy the attached .uf2 file to this drive, after which the device applies the update and resets.

Added

• Irregular tuning support, JI 7-limit on settings + A#3
• Transpose reset with settings+up+down buttons

Changed

• Don't decrease detected zero levels of keys that trigger erroneously.
  They were allowed to go down, which caused erroneous note on messages.
  This also means that a key will be less sensitive if it's held down during start up.

Fixed

• Correctly lower message frequency when multiple keys are pressed (was too low in some cases)