Piano Keyboard

Hemiola's keyboard spans 7 octaves with pressure sensitivity (on iOS and compatible Android devices) and multi-touch chord support.

The keyboard is displayed vertically on phones (portrait), and horizontally on landscape, tablet, and desktop layouts.

On phones, the bottom tab bar is hidden whenever the keyboard layout is too compact (including portrait and compact landscape) to maximise the playable area.
When enough room is available (tablet, desktop, or wider phone layouts), the tab bar and the section name / help link are shown below the keyboard.

Scroll arrows: tap to move one key, long-tap to move one full octave
Pressure toggle: enable or disable touch pressure (velocity) sensitivity
Haptic toggle: enable or disable vibration feedback on key press
Master volume slider: quick access to overall volume
Zoom in/out: adjust key width; long-tap the magnifier to snap to min or max zoom
Center icon: reset zoom to default; long-tap to center the active octave
Preset icon: save and recall Piano Keyboard configurations (scale, scroll position, pressure sensitivity, haptic feedback). Applying a preset immediately redraws the keyboard to the saved zoom and scroll position.