Peterson 490-ST AutoStrobe with Stretch Tuning 490-ST AutoStrobe with Stretch Tuning

Mechanical strobe tuner with stretch tuning

The AutoStrobe 490ST is specifically made for the tuning of piano, marimba, steel pan, and other instruments requiring "stretched" interval tuning.

Capable of handling "stretched" interval tuning, this is the instrument technician's most valuable tool. The Peterson AutoStrobe 490ST offers a vast array of selectable "stretched" tuning options, including pianos of all types. Enjoy the instantaneous response times that only a Peterson can deliver and the relative tuning display of any audio source to 0.1 of a cent (1/1000 of a semitone) accuracy!

With the Model 490-ST, students, technicians, and musicians of all levels can utilize automatic (hands-free) note selection for absolutely the most accurate tuning of any instrument. Key features including real-time display of intonation to improve performance and listening skills while playing as well as mutable throughputs for in-line (yet silent) tuning during performances round out the package!

Features

• Wide selection of pre-programmed stretch files - tables with optimized tunings for all piano types and sizes, from concert grand piano to spinet pianos. Up to 31 additional files may be programmed by the user.
• Automatic note selection
• Automatic image clarity and contrast control - internal compensation for optimal viewing over a wide range of source pitch and volume.
• Enhanced clarity for upper and lower register notes - +2/-1 display feature shifts the strobe patterns into more visible middle ranges - bass note patterns can be displayed two octaves higher and treble note patterns can be displayed one octave lower in strobe display.
• External input and through output with mute - for in-line, silent tuning during performances.
• Guaranteed tuning results to within +/-0.1 cent.
• Hands-free tuning can be accomplished via the built-in mic or plug in a microphone for additional control of the sound source.
• Automatic note detection continually adjusts motor speed for viewing of the input sound relative to the nearest standard pitch.
• Designed, manufactured, and tested in Alsip, IL U.S.A.

Specifications

Power Supply: Built-In (IEC)
Stretch Tuning Tables: 9 Preset Stretches
Note Range: C1 to B8
Note Selection: Automatic or Manual
Foot Pedal Control: +/- Octave, Note Increment
Peterson Connect Compatible: No
Form Factor: Desktop/Bench
Accuracy: 0.1 Cents
Display Type: Single Analog Strobe Disc
Display Resolution: Infinite (Analog)
Construction: Metal Casing
USB Port: No
Power: AC 100V to 240V
Built-In Microphone: Yes
Built-In Speaker: No
Metronome: No
Inputs: 1/4" Jack
Outputs: 1/4" Thru
Mute-able Output: Footswitch Controlled
Tone Generator: No
Concert A Range: 350Hz to 550Hz
Global Cent Offset Range: +/- 50 Cents
Transposition Range: Keys of C, Bb, F, Eb
Frequency Response Range: 32.70Hz to 7902.13Hz
User Presets: 255 User Presets
Historic Temperaments: Yes
Dimensions (L x W x H): 13.4" x 6.375" x 3.5"
Weight: 7 lbs. (3.18 kg)
Manufacturer's Warranty: 1 Year