8-String Guitar tuner — Half Step Down
F-A#-D#-G#-C#-F#-A#-D# · Standard
This free online tuner listens through your microphone and shows how close each string of your 8-String Guitar is to Half Step Down tuning (F-A#-D#-G#-C#-F#-A#-D#). Play a string, watch the needle, and turn the peg until the meter glows green. If you prefer tuning by ear, tap any string card to hear its reference tone.
Other 8-String Guitar tunings
Chords for this tuning
How do I tune my 8-String Guitar to Half Step Down?
Allow microphone access, pluck a string, and the tuner will detect it automatically. The needle shows whether the string is flat or sharp — adjust until the reading is within ±5 cents (F-A#-D#-G#-C#-F#-A#-D#).
Which notes are used in Half Step Down tuning?
Half Step Down tuning for 8-String Guitar uses the notes F-A#-D#-G#-C#-F#-A#-D#, listed from the lowest string to the highest.
Can I tune without a microphone?
Yes. Every string card plays a reference tone — tap it and match your string to the sound by ear.