About OnlineBassTuner
A free bass tuner that works in the browser.
OnlineBassTuner is for bass players, from beginners to experienced players, who want to tune quickly without installing an app. It is a sister site of Online Guitar Tuner and uses the same pitch engine, adapted for low bass notes.
How it works
The tuner reads blocks of sound from your microphone and measures the pitch with the YIN algorithm (de Cheveigné and Kawahara, 2002), refined with parabolic interpolation. For bass it uses a longer window (8192 samples) and searches from 27 Hz, so it covers the low B (30.87 Hz) and low C (32.70 Hz). A median of the latest readings keeps the needle steady, and within 5 cents counts as in tune. In automated tests with synthetic bass-like tones, every string of every preset was read within 2 cents.
The reference tones are synthesised in the browser with the Karplus-Strong plucked-string method. No sound files are downloaded.
Who runs the site
onlinebasstuner.app is run by Takreparation Skåne AB, Sparvgränd 6, 262 41 Ängelholm, Sweden (org.nr 556988-5931, VAT SE556988593101). Contact: info@onlinebasstuner.app.