ST-200 Strobe Tuner by Sonic Research

The ST-200 Strobe Tuner by Sonic Research is a highly advanced tuner designed for precision and versatility. Here are the technical specifications and features:

- True Strobe Display: The ring of LEDs provides a true stroboscope display, instantly indicating the slightest pitch variation. The pattern rotates left if the note is flat and right if the note is sharp.

- Sharp/Flat LEDs: These activate if the note is more than 50 cents out of tune in "open tuning" mode.

- LED Note Display: Displays the note name in chromatic mode or the string number in open tuning mode.

- A4: Illuminates when the A reference is set to any value other than 440.0 Hz, with a range of 300.0 to 599.9 Hz in 0.1 Hz increments.

- Drop Tuning Indicator: Allows for dropping the tuning up to 6 semitones.

- Mode Indicator: Six modes in total, with all except CHRM (chromatic) being fully programmable.

- True Bypass, Muted Output: Ensures the output is muted when the tuner is on, and the input signal is passed directly to the output when off.

- Extreme Accuracy: The internal timing generator is calibrated at the factory to maintain a precision of ±0.02 cents.

- Chromatic Mode: Permits tuning to any of the 12 notes from C0 to C8 in any temperament.

- Open Tuning Modes: Selects notes defined for a particular tuning, displaying the string number instead of the note name.

- Power On Restore: The ST-200 remembers mode, drop tuning, and A4 changes without the need for a battery.

- Flat Tuning: Lowers all pitches up to six semitones.

- Reference Pitch Change: The reference pitch can be changed in increments of 0.1 Hz from 300.0 Hz to 599.9 Hz.

- Temperaments: Operates in equal temperament or any 12-note temperament desired, storing a total of 5 different temperaments in addition to the equal temperament.

- Battery or External 9 Volt Operation: Can operate for 12 hours continuously from a standard alkaline battery or with any 9 Volt adapter designed for stomp boxes.

- Low Battery Indication: Provides a low battery warning when there is about half an hour of battery life remaining.

The ST-200 Strobe Tuner is a powerful and versatile tool for musicians seeking precision tuning across various modes and temperaments.