Peterson 490-ST AutoStrobe Tuner with Stretch Tuning Black

Precision tuning for any instrument. My dad repaired all types of pianos and guitars, was an avid musician all around. This was his, it’s been checked out and it’s working properly.

For those interested, extended details follow.

Peterson Model 490ST AutoStrobe Tuner with Stretch Tuning
8-octave Desktop Stroboscopic Tuner, with .1-cent Accuracy, Built-in Microphone, Mutable Throughputs, and 9 Factory (31 Programmable) Stretch-octave Tuning Modes
Tune Your Own Pianos and Percussion

With nine stretched-octave factory presets and 31 custom user profiles, the Peterson AutoStrobe 490ST makes it possible to tune uprights and concert grands to mallet instruments and electric pianos from the comfort of your own home. The AutoStrobe 490ST is one of the most powerful strobe tuners on the market, boasting an 8-octave range and accuracy within 1/1000 of a semitone (±0.1 cents). So whether you’re double-tracking guitars in the studio or tuning band instruments before a performance, the AutoStrobe 490ST has you covered for the most demanding tuning applications.

Stretched-octave tuning modes for pianos and percussion

Equal temperament tuning can have ill effects on smaller pianos due to a phenomenon called inharmonicity, in which the inflexibility of steel piano strings can cause higher-order harmonics to be sharp by as much as a perfect fifth. Stretched-octave tunings account for this by elongating the octaves (2.1:1, for example) to reduce beating between notes and produce an ear-pleasing sound. The AutoStrobe 490ST’s nine preset modes cover everything from spinets to concert grands, with 31 user-programmable stretch tunings to intonate reed and tine electric pianos, mallet percussion instruments, pan drums, and more.

Precision tuning for any Instrument

For studios, schools, and instrument technicians alike, the Peterson AutoStrobe 490ST desktop tuner is ready for any tuning task. This stroboscopic mechanical tuner displays both fundamentals and overtones. The innovative display automatically compensates for clear visibility over a wide range of pitch and volume, and improved clarity for upper- and lower-register notes. And it's easy to transpose for a wide variety of instruments including Bb, F, and Eb instruments. Factor in the built-in tuning presets featuring historic temperaments and sweetened tunings, and the Peterson AutoStrobe 490ST from Sweetwater comes highly equipped for any tuning application.

Peterson AutoStrobe 490ST Instrument Tuner Features:

9 preset stretched-octave modes for spinet pianos to concert grands
31 user-programmable stretched-tuning profiles — great for mallet percussion and more
Automatic or Manual note selection
Vivid display is highly visible and precise, even when viewing from a distance
+2/-1 display feature makes it easier to tune high- and low-register notes by shifting the strobe pattern
Mutable throughputs allow for silent tuning
Accurate within 1/1000 of a semitone (±0.1 cents)
Can be transposed for keys of C, Bb, F, and Eb
Built-in microphone for acoustic instruments
Eight built-in tuning presets include historical temperaments and sweetened tunings
64 User Preset locations for storing your own custom tunings

Specification Detail
Type 8-octave Tuner
Format Desktop
Display Type Analog Strobe Disc
Reference Pitch A4 = 350-550Hz
Tuning Range 32.70-7902.13Hz
Power Supply Standard IEC AC cable
Inputs 1 x 1/4"
Outputs 1 x 1/4" (through)
Height 3.5"
Depth 6.37"
Width 13.4"
Weight 7 lbs.