Zhongruan tuner – Standard (G-D-G-D)
G-D-G-D · Standard
This free online tuner listens through your microphone and shows how close each string of your Zhongruan is to Standard (G-D-G-D) tuning (G-D-G-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.
About Standard (G-D-G-D) tuning
Standard (G-D-G-D) is the reference tuning for the Zhongruan – the pitch the instrument normally ships at, and the starting point every other tuning on this page is measured from.
Played open, the strings sound G-D-G-D – from G2 at the bottom to D4 at the top, a span of 1 octave and 7 semitones. Step by step across the neck the intervals are a fifth, a fourth, a fifth, and that is what decides how chord shapes fall under the hand.
Strummed open, the strings spell G5 – root and fifth with no third, so the tuning stays neutral between major and minor. See G5 shapes in this tuning →
The zhongruan is the tenor of the ruan family – a round-bodied, long-necked lute with frets – and G-D-G-D is its orchestral tuning: two fifth-plus-fourth pairs an octave apart. With only two pitch classes on the open strings, chords are built from fretted notes, and the instrument sits naturally in keys around G and D.
Soloists and plucked-string ensembles also use A-D-A-D and G-D-A-E. The all-fifths option turns the zhongruan into something like a tenor-register mandola, which is why it shows up in crossover and jazz settings.
History
Zhongruan
The ruan takes its name from Ruan Xian, one of the Seven Sages of the Bamboo Grove in the 3rd century, who was famous for playing it. A round-bodied ruan with long neck, inlaid in mother-of-pearl, survives from the Tang dynasty in Japan's Shōsōin.
For most of its history it was a minor instrument. The modern family – xiaoruan, zhongruan, daruan – was created in the 1950s for the Chinese orchestra, where the zhongruan became the tenor of the plucked section and the most common ruan for solo playing.
Where the Standard (G-D-G-D) tuning comes from
G-D-G-D is the standard tuning of the zhongruan, established when the ruan family was standardised in the 1950s.
Other Zhongruan tunings
Standard
Alternative
Chords for this tuning
How do I tune my Zhongruan to Standard (G-D-G-D)?
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 (G-D-G-D).
Which notes are used in Standard (G-D-G-D) tuning?
Standard (G-D-G-D) tuning for Zhongruan uses the notes G-D-G-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.