Online Bassoon Tuner
The bassoon is a double-reed instrument that does not transpose. Its written notes sound at the same pitch, whether the part uses bass or tenor clef. This page opens without transposition: written C4 appears as C4, at 261.63 Hz when A4 = 440 Hz.
Written notes and concert pitch
Bassoon does not transpose: written C4 sounds C4, at 261.63 Hz with A4 = 440 Hz. Both the displayed note and frequency describe concert pitch. The table uses scientific pitch notation: C4 is middle C and A4 is the 440 Hz reference A. Frequencies describe the sound in equal temperament; changing the reference A scales all the frequency values.
| Written note | Concert pitch | Frequency (Hz) |
|---|---|---|
| C4 | C4 | 261.63 |
| D4 | D4 | 293.66 |
| A4 | A4 | 440.00 |
How to use it
- Prepare your reed following your normal practice routine and warm up the bassoon for a few minutes.
- Enable the microphone, keep C with no transposition and select your ensemble’s reference A.
- Sustain a comfortable note without vibrato and let the attack settle before reading the display.
- Compare several registers; discuss persistent tendencies with your teacher before changing the reed or bocal.
Help and explanations
Use sustained notes after warming up to compare intonation. Reed, bocal, air and embouchure all affect the result. A cents reading helps you track a tendency, but cannot by itself tell you which component needs changing or how a reed should be adjusted.
Reed and bocal in bassoon tuning
Measure with the reed and bocal you will actually use in rehearsal. Reed resistance and bocal characteristics influence response; changing one component to fix a single note can affect other notes. Keep your usual tone production and follow your teacher or manufacturer for adjustments suited to your instrument. Bocals of different lengths can change overall intonation. Do not pull the reed out at random to compensate for an isolated reading.
Check more than one register
Begin where your tone speaks easily, then compare low and high notes at a similar dynamic. An unstable attack or strong overtone may briefly produce a different reading. Wait for the note to settle and check the displayed octave before deciding that the instrument’s tuning has changed.
Tips
- Tune after warming up in the temperature where you will perform.
- Measure while nearby instruments are silent.
- Record tendencies by note and reed instead of correcting every reading by squeezing.
Frequently asked questions
Is the bassoon a transposing instrument?
No. Ordinary bassoon parts show the sounding pitch; select C without transposition. Contrabassoon has a different octave relationship and needs separate attention.
Which reference A should I use?
Use the pitch agreed by your ensemble, such as A4 = 440 or 442 Hz. A note in another octave has another frequency, so check both the note and octave.
Can I tune a bassoon by changing its bocal?
Different bocals can change response, but a single reading is not enough to choose one. Compare several notes and follow your teacher or manufacturer’s guidance.
Why does a low note show a different octave?
An overtone may be stronger than the fundamental at the microphone. Play steadily, reduce surrounding noise and check other comfortable notes before making an adjustment.