Automatic Image Clarity And Contrast Control - Internal Compensation For Optimal Viewing Over A Wide Range Of Source Pitch And Volume.Additional Files May Be Programmed By The User.Wide Selection Of Pre-Programmed Stretch Files - Tables With Optimized Tunings For All Piano Types And Sizes.Users can program up to 31 stretch tunings of their own. The AutoStrobe 490-ST comes with 9 factory preset tables that range from concert grand piano to spinet pianos. PRESET STRETCH TABLES! 'Stretch' refers to specific adjustments in the frequencies (pitches) of notes to enhance the overall quality of tuning within an 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! 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. 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! The Peterson AutoStrobe 490ST offers a vast array of selectable stretched tuning options, including pianos of all types. Peterson AutoStrobe 490-ST Mechanical Strobe Tuner w/Stretch TuningĬapable of handling stretched interval tuning, this is the instrument technician's most valuable tool.

Peterson autostrobe 490 strobe tuner