A♭8 at every common reference pitch
A note’s frequency depends on what A4 is tuned to. The standard is 440 Hz; the other three are the ones you are most likely to meet. The cents column is how far each one sits from the 440 version — the same for every note, because changing the reference moves the whole scale together.
| Reference | A♭8 | vs 440 |
|---|---|---|
| A4 = 415 Hz · Baroque pitch | 6267.3 Hz | −101.3¢ |
| A4 = 432 Hz · “Verdi” pitch | 6524.1 Hz | −31.8¢ |
| A4 = 440 Hz · Standard (ISO 16) | 6644.9 Hz | — |
| A4 = 442 Hz · Orchestral | 6675.1 Hz | +7.9¢ |
One cycle of A♭8 lasts 150.5 µs, and its wavelength in air at 20 °C is 5.2 cm. Hold it as a steady tone in the tone generator.
A♭8 on the piano
A♭8 is above the top of an 88-key piano, whose highest key is C8 — 8 semitones higher. Press any key below to compare it with its neighbours.
A♭8 on the guitar
A♭8 is above the highest fret of any standard guitar, so a guitar in standard tuning cannot play it.
A♭8 on the staff
Instruments that can play A♭8
None of the instruments in our range charts reach A♭8.
A♭8 is outside the typical range of all six voice types. Test your own range.
The harmonics of A♭8
A played A♭8 is not one frequency. A string or a pipe also sounds whole-number multiples of it, and the mix of those harmonics is the instrument’s tone. Here is where the first eight land — and why the 7th sounds out of tune against a piano.
| Harmonic | Frequency | Nearest note | Off by |
|---|---|---|---|
| 1 (fundamental) | 6644.9 Hz | A♭8 | 0¢ |
| 2 | 13,290 Hz | A♭9 | 0¢ |
| 3 | 19,935 Hz | E♭10 | +2.0¢ |
| 4 | 26,580 Hz | A♭10 | 0¢ |
| 5 | 33,224 Hz | C11 | −13.7¢ |
| 6 | 39,869 Hz | E♭11 | +2.0¢ |
| 7 | 46,514 Hz | F♯11 | −31.2¢ |
| 8 | 53,159 Hz | A♭11 | 0¢ |
Frequently asked questions
What is the frequency of A♭8?
A♭8 is 6644.9 Hz in equal temperament with A4 tuned to 440 Hz, the international standard. At A4 = 432 Hz it is 6524.1 Hz, and at the orchestral A4 = 442 Hz it is 6675.1 Hz.
Is A♭8 the same note as G♯8?
On a piano, a guitar or a tuner, yes: A♭8 and G♯8 are the same key and the same frequency, 6644.9 Hz, in equal temperament. They are two names for one pitch (enharmonic equivalents). Which one is written depends on the key — sharps in sharp keys, flats in flat keys — and a string or wind player may pitch them a few cents apart when playing in just intonation.
How do I play A♭8 on a piano?
A♭8 is above the top of an 88-key piano, whose highest key is C8 — 8 semitones higher.
Which instruments can play A♭8?
None of the instruments we chart reach A♭8; it is outside the range of ordinary instruments.
Typing it? A♭8 is also written Ab8 or G#8. Convert any frequency on the Hz-to-note converter.