Online Bass Clarinet Tuner
The usual B♭ bass clarinet sounds a major ninth below its modern treble-clef notation. Written C4 therefore sounds B♭2, at 116.54 Hz with A4 = 440 Hz. This page opens with the corresponding octave-and-tone transposition.
Written notes and concert pitch
For B♭ bass clarinet in modern treble-clef notation, written C4 sounds B♭2: 116.54 Hz with A4 = 440 Hz. The note is written pitch; Hz are 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 | B♭2 | 116.54 |
| D4 | C3 | 130.81 |
| A4 | G3 | 196.00 |
How to use it
- Confirm that your part uses modern treble-clef notation for B♭ bass clarinet.
- Warm up, enable the microphone and keep the octave-and-tone transposition selected.
- Set your ensemble’s reference A and sustain a comfortable note without vibrato.
- Compare more than one register; review reed, mouthpiece and tone production with your teacher if a tendency persists.
Help and explanations
The displayed note follows your written part; the Hz value describes the sound detected by the microphone. Warm up before measuring and set the reference A agreed by your band or orchestra, rather than assuming every rehearsal uses the same pitch.
Modern treble clef and historical bass clef
This setting matches the modern treble-clef convention for B♭ bass clarinet. Older bass-clef parts can use a different relationship between written and sounding pitches. Check the edition and conductor’s guidance before comparing notes; the same transposition should not be assumed for every historical score.
Get a stable low-note reading
Use your rehearsal reed and mouthpiece, fitted according to the manufacturer’s instructions. A strong overtone in the low register may move the reading to another octave. Let the attack pass, keep a continuous airstream and check the displayed octave. Avoid using excessive reed pressure to force a centered needle.
Tips
- Check the reference A before comparing with a piano.
- Keep the microphone away from direct breath and other players.
- Compare low and middle notes with consistent tone production.
Frequently asked questions
How far does bass clarinet transpose?
In modern treble-clef notation, B♭ bass clarinet sounds a major ninth lower: one octave plus a whole tone. This page compensates the displayed note accordingly.
What does written C4 sound on bass clarinet?
It sounds B♭2, approximately 116.54 Hz with A4 = 440 Hz. The screen shows written C4 while the frequency remains the actual measured sound.
Does this setting fit an old bass-clef part?
Not necessarily. Historical conventions vary; confirm the edition’s written-to-sounding relationship before selecting a transposition.
What should I check when a note stays flat?
Check warm-up, reed condition, mouthpiece assembly and air support. Adjustments depend on your instrument and technique, so follow your manufacturer or teacher.