Bass Guitar Tuner – Free Online Bass Guitar Tuner With Microphone
Microphone tunerReady
Play each target note through your speakers.
- Quiet room, one string at a time
- Tune up to the note
- ±5 cents counts as in tune
- Runs inside your browser
- No upload, no account
- Nothing saved after you close
Online bass guitar tuner with microphone
Allow microphone access, play one string at a time and follow the needle until it centres. Four-string bass tuning E1–G2, with 5- and 6-string and drop D options.
Bass guitar string notes
E1 41.2 Hz, A1 55 Hz, D2 73.42 Hz, G2 98 Hz: an octave below the lowest four guitar strings.
Tuning low strings with a mic
Laptop mics struggle below 60 Hz; play harmonics at the 12th fret, which are an octave higher and easier to detect.
Tuning with a microphone tuner
The tuner detects pitch from the waveform’s repeating period, shows the nearest target string and how many cents away you are.
How to Use the
Bass Guitar Tuner
- 01
Quiet
reduce background noise.
- 02
Allow
press Start Tuner and allow the microphone.
- 03
Pluck
play one string and let it ring.
- 04
Adjust
tighten if the needle is left (flat), loosen if right (sharp) until centred.
Bass guitar string notes
E1 41.2 Hz, A1 55 Hz, D2 73.42 Hz, G2 98 Hz: an octave below the lowest four guitar strings.
Tuning low strings with a mic
Laptop mics struggle below 60 Hz; play harmonics at the 12th fret, which are an octave higher and easier to detect.
Tuning with a microphone tuner
The tuner detects pitch from the waveform’s repeating period, shows the nearest target string and how many cents away you are. ±5 cents counts as in tune.
Troubleshooting the tuner
Mic allowed but nothing happens
Choose the correct input in your OS, move closer, and play louder single notes.
Other instruments
See all tuners on the tuners page.
Related guides and fixes
Learn more in these guides: How to tune a guitar, What note am I singing, Microphone not working.
Step by step
Instructions for tuning your bass
Allow the mic, pluck one string, tighten if flat, loosen if sharp, repeat for each string.
Frequently Asked Questions
Q.Why does the needle jump?
Pluck one string at a time and mute others.
Q.Do I need a clip-on tuner?
No, a mic works in a quiet room.
Q.What is a cent?
One hundredth of a semitone.