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Peterson Autostrobe 490-ST Tuner
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Model AS490-ST includes the same basic features as the AS490, but with stretch tuning capabilities for stringed and percussive instruments such as the piano, guitar, marimba, steel pan, and others. Various pre-programmed stretch tables with optimized tunings are included for all piano types and sizes. Up to 31 additional files may be programmed by the user.
Model: Autostrobe 490-ST