Octave 3 Piano Notes — Frequencies & Keys
12 keys from C3 (130.81 Hz) to B3 (246.94 Hz).
| Note | Frequency | MIDI | Key |
|---|---|---|---|
| C3 | 130.81 Hz | 48 | 28 of 88 |
| C#3 | 138.59 Hz | 49 | 29 of 88 |
| D3 | 146.83 Hz | 50 | 30 of 88 |
| D#3 | 155.56 Hz | 51 | 31 of 88 |
| E3 | 164.81 Hz | 52 | 32 of 88 |
| F3 | 174.61 Hz | 53 | 33 of 88 |
| F#3 | 185.00 Hz | 54 | 34 of 88 |
| G3 | 196.00 Hz | 55 | 35 of 88 |
| G#3 | 207.65 Hz | 56 | 36 of 88 |
| A3 | 220.00 Hz | 57 | 37 of 88 |
| A#3 | 233.08 Hz | 58 | 38 of 88 |
| B3 | 246.94 Hz | 59 | 39 of 88 |