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Boss TU-121 User Manual

Boss TU-121
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Boss TU-121 Specifications

General IconGeneral
TypeChromatic Tuner
Tuning RangeA0 (27.5 Hz) - C8 (4186 Hz)
Reference PitchA4 = 440 Hz
Tuning Accuracy± 1 cent
Input Impedance1 MΩ
Input1/4" phone jack
Output1/4" phone jack
Power Supply9V Battery
DisplayLED
ConnectorsInput, Output

Summary

Panel Descriptions

Panel Controls and Jacks

Identifies key controls like switches, knobs, and jacks.

Panel Indicators and Speaker

Describes the meter, indicators, and internal speaker.

Important Usage Notes

Covers power supply, placement, and general advice.

Controls and Indicators Explained

Tuning Indicators and Displays

Explains note name, pitch, octave, and tuning guide indicators.

Tuning Adjustment Buttons

Details the PITCH, OCTAVE, NOTE, and DOWN buttons.

Regulatory and Maintenance Information

Includes FCC statement, cleaning, and safety.

Tuning Modes and Operations

AUTO Mode Tuning Guide

Automatic tuning by playing single notes.

MANUAL Mode Tuning Guide

Tuning to a specific note or practicing.

Connections and Reference Data

Diagrams and note tables for setup and reference.

Reference Note and Unit Features

Reference Note and Pitch Settings

Using the reference note and adjusting pitch.

Backup, Battery, and Specifications

Covers memory backup, battery replacement, and technical specs.

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