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KHADAS Tone2 User Manual

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Tone2
Hi-Fi Mini Desktop DAC
Quicksta丨入门指南
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KHADAS Tone2 Specifications

General IconGeneral
CategoryMedia Converter
USB InterfaceUSB-C
Audio Formats SupportedPCM, DSD
Bit Depth32-bit
Sample Rate (DSD)DSD256
THD+N< 0.0003%
SNR> 120dB
DNR> 120dB
Output Voltage (RCA)2.0Vrms
Output Voltage (4.4mm)4.0Vrms
Dimensions90mm x 60mm x 20mm
Output PortsRCA, 3.5mm, 4.4mm
Sample Rate (PCM)Up to 384kHz
Output Level (3.5mm)2V RMS
USB Audio ClassUAC2.0

Summary

Device Interface Overview

Ports and Connectors

Details the Balanced RCA, S/PDIF, and USB-C ports for audio and power.

Controls and Indicators

Describes the Volume Knob, Power LED, and RGB LED light for operation.

Driver Installation

Install Khadas ASIO USB Driver

Download and install the ASIO driver for enhanced audio performance.

Restart PC for Driver Activation

Reboot your computer to activate the newly installed USB driver.

Firmware Upgrade Process

Download DFU Upgrade Tool

Obtain the latest tool for firmware flashing.

Download Latest Tone2 Firmware

Get the most recent firmware file for the Tone2.

Flash Firmware via USB-C

Connect Tone2 via USB-C and use the DFU tool to update firmware.

Power Cycle After Update

Power off and restart the Tone2 to apply the new firmware.

Input and Output Sources

Balanced RCA Output Usage

Connect to amplifier/speakers via balanced analog output.

S/PDIF Coaxial Input Usage

Connect to CD players or digital sources via coaxial input.

Bluetooth Module Input

Use with 'Khadas BT Magic' for Bluetooth audio reception.

USB-C Data and Power Input

Connect computers, smartphones for data and power.

RCA Connection Modes

Balanced RCA (R/L) Signal Handling

Describes signal types for balanced RCA ports with different cables.

S/PDIF Coaxial Input Function

Details the S/PDIF coaxial input and its signal handling.

Power Input Priority

USB-C (I2S) Power Source

Recommended for linear power supplies via USB-C I2S port.

USB-C (USB) Power Source

For power from smartphones, PCs, or SBCs via USB-C USB port.

Volume Knob Operations

Volume Knob Push Actions

Functions triggered by single, double, triple, or long presses of the volume knob.

Volume Knob Rotate Actions

Functions triggered by rotating the volume knob clockwise or counter-clockwise.

LED Indicators

Power LED Status

Indicates power supply status via USB-C (I2S) or USB-C (USB).

RGB Ring Light Function

Explains the multi-color ring light for various device statuses.

RGB Ring Light Interpretation: Volume and Track

Volume Level Indication

Shows volume levels and mute status using turquoise light.

Track Control Indication

Indicates track status (e.g., playback, skip) using red light.

RGB Ring Light Interpretation: Input and Filter

Input Source Selection

Displays input source (USB, S/PDIF, 12S, AUTO) using yellow and red lights.

Filter Mode Selection

Shows digital filter modes using blue and red lights.

RGB Ring Light Interpretation: Audio Format

DSD Audio Format Display

Indicates DSD audio sample rates (64, 128, 256, 512) using white light.

PCM Audio Format Display

Indicates PCM audio sample rates (44.1K-768K) using yellow light.

RGB Ring Light Interpretation: Encoder and Power

Encoder Locked Status

Indicates when the encoder knob is locked, flashing white.

Power Off Status

Shows the device power off state using grey light.

Frequently Asked Questions

Driver, Connectivity, and Compatibility

Covers driver needs, RCA/Bluetooth/USB connections, and device compatibility.

Input Modes and Power Handling

Explains Auto mode priority, USB-C phone power, and I2S port powering.

Audio Features and Volume Control

Discusses RCA voltage, TV input, and HID volume adjustment specifics.

Troubleshooting Common Issues

Volume Knob and Power LED Issues

Solutions for unresponsive volume knob and power LED problems.

PC Detection and Audio Output Problems

Fixes for computer not detecting Tone2 or no sound output.

S/PDIF and HID Volume Control Issues

Addresses sound problems with S/PDIF and HID volume control malfunctions.

Technical Specifications

Balanced RCA Output Performance

Detailed performance metrics for balanced RCA line-out.

Single-Ended RCA Output Performance

Detailed performance metrics for single-ended RCA line-out.

What's In The Box