furnace/doc/8-advanced/piano.md

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# piano / input pad
The piano serves as a non-keyboard interface to input notes.
![piano chart](piano.png)
The buttons at the left do the following:
| | | |
| :---: | :---: | :---: |
| move one octave down | move one octave up | open options |
| fewer visible octaves | more visible octaves | swap buttons |
When swapped, the bottons do the following:
| | | |
| :---: | :---: | :---: |
| input note off | input note release | open options |
| input macro release | delete | swap buttons |
Every C key is labelled with its octave.
Right-clicking on the piano keys will make the buttons disappear; right-clicking again brings them back.
## options
Key layout:
- **Automatic**
- **Standard**: Black keys are 2/3 length.
- **Continuous**: Black keys are full length.
**Share play/edit offset/range**: If disabled, the piano will keep different octave and range values for playback and non-playback states.
**Read-only (can't input notes): Prevents note entry.