Musical Key Explorer

Pick a key — get the notes, frequencies, and every chord you can build with them

Root Note

Scale / Mode

Display Octave

C Major

Root In scale

Keyboard

Notes in this key

Frequencies across all octaves

Chords

▦

Sequencer / Mini DAW

Arrange notes & chords, play back, export MIDI

▸

Pattern

Song order

BPM

Time

Step

Bars

Swing %

Track

Length

Velocity

Cursor1

Steps32

StatusIdle

Cell Inspector — —

Velocity 100

Gate length 95%

Probability 100%

Duration (steps) 2

Arpeggiator

Arp rate

Click a sequencer cell to inspect · Toggle Record, then click notes/chords above to add · Shift+click a filled cell to delete · Drag notes/chords onto cells · Space play, R record, Ctrl+Z undo