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Best Dobro Tuner? Free Strobe for Resonator Open G
Why a strobe is the best dobro tuner
A resonator played with a steel bar produces a long, bright, overtone-dense tone - the signal a strobe is designed for. The pattern settles and the cents reading is steady, so each open string locks cleanly. StroboPro gives the resonator cone's strong high partials their own rotating harmonic rings, turning the instrument's rich spectrum into useful tuning information.
Open G (GBDGBD) - the bluegrass standard
The squareneck dobro is played almost exclusively in open G, G2, B2, D3, G3, B3, D4 (GBDGBD) - a G major triad across the strings, one whole step higher than a guitar's open G (DGDGBD). The high string tension is why squareneck resonators are built heavy and solid. StroboPro ships this as the Open G preset, plus standard EADGBE for roundneck players who fret.
Tune with the bar off the strings
Squareneck or roundneck, set the open tuning with the bar off the strings: a squareneck lays flat in your lap under the steel, while a roundneck is held the same way for slide work, not fretted. Pluck each open string and bring it up from below so the banjo-style tuners settle rather than slip. The resonator cone throws strong high partials out of the cover plate - on a strobe those partials are signal, not noise. Each one gets its own rotating harmonic ring, so watch the high rings, not just the fundamental: when the bright cone partials stop moving, the string is genuinely in tune across its spectrum.
How to tune a dobro with StroboPro
- Open the dobro tuning - tap the Tap to Tune button (the one with the microphone) and allow microphone access.
- Bar clear of the strings, pluck each open string, and bring it up to pitch from below.
- Read the strobe - when the harmonic rings stop rotating, the string is set.
- Re-check once the neck settles; resonators drift with temperature and heavy string tension.
- Every chord you play with the bar is only as in tune as these open strings.
Related guides
Frequently asked questions
What tuning is a dobro played in?
Squareneck dobros are played in open G, GBDGBD (G2, B2, D3, G3, B3, D4) - a G major triad across the strings, higher than a guitar's open G. Roundneck dobros are also played in standard guitar tuning (EADGBE). StroboPro ships both as presets. Open it directly: [dobro open G tuning](https://strobopro.se/preset/dobro/6-string/open-g).
Why use a strobe for resonator?
The resonator cone produces a bright, sustained, overtone-rich tone that a multi-harmonic strobe can display clearly. Each harmonic gets its own rotating ring, so the fundamental and partials show together; when they all stop moving, the string is in tune.
Support independent development with premium access
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You can try the full version during a no-strings-attached trial. The trial never converts automatically: when it ends, premium features are simply disabled until you actively choose an affordable subscription or a one-time purchase for lifetime premium access. The one-time purchase is available on iOS and Android, like buying the app outright; web one-time purchase support is coming soon.
Published by Applicaudia, the maker of StroboPro. The 0.1-cent figure describes the tuner's display resolution, not a lab-measured accuracy specification. Frequency values are equal-temperament approximations.
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