Introduce Maestration mode

[cdauth]

In addition to Listen and Compose mode, introduce an additional mode called Maestrate (name up for debate).

The screen would be full of buttons, where each button represents one hand signal that a maestra can show. For now, the buttons can just be text, at some point we could possibly add static or animated drawings.

The player would represent the band, while the person sitting in front of the computer represents the maestra. As soon as the maestra presses the “Whistle In” button, the whistle sounds 4 times and then the player starts playing whatever the maestra has shown before. Pressing the button for any hand sign would sound the whistle, as a maestra would do it. Pressing the “Whistle In” button while the band is already playing would probably wait for the start of the next bar, then whistle 4 times, and then the band would play the newly shown breaks. Probably it is too annoying to be required to show the “ready” sign (horizontal forearm with fist against the head) to announce the whistling in.

The buttons would dynamically change to disallow sequences of hand signals that are invalid. I'm imagining that by default, there would be a button for all universal hand signals and a button for each tune. The universal hand signals that are not valid in the current context (for example the “Repeat” or “Whistle in” sign are not valid without having shown another hand signal before) would be disabled but still shown. When clicking a tune hand signal, the tune-specific hand signals would appear in addition. The exact details for all this are very complex, but they should represent the logic in which the maestra can use the hand signals.

The purpose of this all is to have a way to practice maestration at home. The user would practice showing different hand signals and get immediate feedback whether the band will respond as intended, so they could practice the meaning of the hand signals but also the creativity of coming up with different combinations and hearing what they sound like.