Gustard AUDALYTIC DR70 R2R Streaming DAC User Manual

Product Overview

The Gustard AUDALYTIC DR70 is an advanced R2R Streaming DAC designed for high-fidelity home audio systems. It features a proprietary discrete R-2R module, native 1-bit DSD D/A conversion, and an FPGA-implemented logic for precise audio processing. The device also incorporates a dedicated network bridge system for seamless music playback and a femtosecond-grade CK01 clock module for superior timing accuracy.

Image: Overview of key features including R2R, 1-Bit DSD, FPGA, and CK01 Clock Module.

Key Features:

• Proprietary Discrete R-2R Module: Utilizes a resistor-based switching network for direct and natural digital-to-analog conversion, requiring high precision in the resistor network.
• 1-Bit DSD: True 1-Bit DSD D/A Converter with native DSD512 support, equivalent to 8x oversampling of SACD-standard DSD64.
• FPGA Implementation: Employs a field-programmable gate array for flexible logic functions, clock management, and digital shaping, including DoP demodulation and PCM/DSD depop switching.
• Bridge System: Hardware purpose-built for music playback, running on the dedicated CelWare3.x system, supporting software-controlled playback applications and maximizing playback efficiency.
• XMOS XU316: Features the third-generation USB Audio XU316, supporting up to PCM 768kHz and DSD512.
• CK01 Clock Module: Delivers femtosecond-grade precision timing for the entire system.
• Dedicated Power Supply Groups: Independent voltage regulation for each circuit group minimizes interference and ensures optimal performance.
• Full Aluminum Chassis: Anodized finish in black or silver.
• Remote Control Support: For convenient operation.
• LCD Display: With adjustable brightness and sleep mode.

What's in the Box

The following items are included with your Gustard AUDALYTIC DR70:

• DR70 Main Unit
• Power cord
• Type-C cable
• Remote Control
• Bluetooth Antenna
• Warranty card

Image: Visual representation of the DR70 main unit, warranty card, Bluetooth antenna, power cord, Type-C cable, and remote control.

Setup and Connections

Front Panel Controls:

Image: Front view of the DR70 unit, highlighting the touch standby control, display area, and touch interface.

1. Power Button: Press and hold to power off; short press to mute/unmute.
2. Display Screen: Displays input source, audio format, sampling rate, and volume level in real time.
3. Volume Buttons (+/-): Use to adjust volume (00-100 levels).
4. Settings Button: Short press to switch audio input sources; press and hold to enter/exit the menu.

Rear Panel Connections:

Image: Rear panel of the DR70, showing various input and output ports including XLR, RCA, Coaxial, Optical, USB, Ethernet, and power input.

• XLR Balanced Output (L/R): For balanced audio output.
• RCA Single-Ended Output (L/R): For unbalanced audio output.
• Bluetooth Antenna Port: Connect the included Bluetooth antenna.
• Coaxial Input 1 & 2: Digital audio inputs.
• Optical Input: Digital audio input.
• USB Input (Type-C): For connecting to a computer or streaming device.
• TF Card Slot: For local media playback.
• LAN Input (Ethernet): For network streaming capabilities.
• DC Input: For external 9V-18V DC power supply.
• AC Power Socket (110V/220V): Connect the main power cord. Supply design requires no manual voltage selection.
• Fuse: Power protection fuse.

Operating Instructions

Display and Panel Controls:

The DR70 features a display screen and touch controls for easy operation.

• Input Sources: The DR70 supports USB Audio, Network Stream, Coaxial 1 (COAX1), Coaxial 2 (COAX2), Optical (OPT), and BT Bluetooth (BT).
• Input Selection: While on the home screen, briefly press the Settings button to enter input source selection. Use the Volume +/- buttons to navigate, then press the Settings button again to confirm and exit.
• Volume Control: When the home screen is active, press the Volume +/- buttons to adjust the DR70's volume, available in 0-100 steps.

Settings Menu:

To access the Settings Menu, press and hold the Settings button from the home screen. Use the +/- buttons to cycle through menu items and press the Settings button to enter a submenu or confirm a selection. Press and hold the Settings button to return to the home screen.

Image: Flowchart illustrating the DR70's menu functions, including Digital Filter, DSD Direct, Display Brightness, Screensaver, Auto Standby, Language, Firmware Update, and Factory Reset.

• Digital Filter: Offers four digital filter modes: Fast (352.8K/384K), Medium (176.4K/192K), Slow (88.2K/96K), and NOS (Native Original Sampling).
• DSD Direct: ON (DSD signals are directly passthrough), OFF (DSD signals are converted to PCM for decoding).
• Display Brightness: Three levels available: Bright, Standard, and Dim.
• Screensaver: ON (screen turns off after 30 seconds of inactivity), OFF (display remains on continuously).
• Auto Standby: When enabled, the unit enters standby mode after 15 minutes if in UNLOCKED state, or when no audio is playing on USB/STREAM inputs.
• Language: Supports Chinese, English, and Japanese.
• Firmware Update: Select 'Yes' and press '+' to view steps, then any key to enter upgrade mode.
• Factory Reset: Restores all settings to their original factory defaults.

Remote Control:

Image: Diagram of the DR70 remote control, detailing buttons for Standby, Input Select, Navigation, Menu, Back, Volume, and Mute.

1. Standby Button: In standby mode, press to wake up the DR70 and activate the display. During normal operation, press to put the DR70 into standby mode.
2. Input Select Button: Press to cycle through the available input sources on the DR70.
3. Four-Directional Navigation Button: Use Up/Down to navigate menu options. Use Left/Right to adjust settings. Press OK to confirm selections.
4. Menu Button: Press to enter the main menu. Press again to exit the menu and return to the home screen.
5. Back Button: Returns to the home screen from any menu or submenu.
6. Volume Down Button: Decreases the output volume when the DR70 is on the home screen.
7. Volume Up Button: Increases the output volume when the DR70 is on the home screen.
8. Mute Button: Mutes or unmutes the audio output.

Important Notes for Remote Control:

• Operational range may vary depending on the angle of use.
• Obstructions between the remote and the sensor may prevent proper operation.
• Remove the batteries if the remote will not be used for an extended period (one month or longer).
• If battery leakage occurs, thoroughly clean the battery compartment and install new batteries.
• This remote may accidentally operate other infrared-controlled devices when used nearby.

Driver Installation for Windows

The DR70 is compatible with various Windows operating systems. macOS and Linux systems have built-in plug-and-play support, requiring no additional driver installation.

This driver supports Windows 7 (requires SP1 or later), Windows 8, Windows 10, and Windows 11.

Related drivers, components, and user manuals can be downloaded from the official Gustard website: www.gustard.com

Driver Download: https://www.gustard.com/?page_id=8956

User Manual Download: https://www.gustard.com/?page_id=8958

Installation Steps:

1. For desktop users, use native USB 2.0 ports. Always prefer rear-panel ports (direct motherboard connection). Avoid front-panel ports as extended cable routing can degrade high-speed signaling.
2. Connect the Gustard device via USB. Power on. If no "New Hardware" prompt appears, try alternate USB ports. Power-cycle the Gustard USB interface.
3. Run `Gustard_UsbAudio_v4.82.0_setup.exe` (or later versions). Click "Yes" in the User Account Control prompt.
4. Follow on-screen instructions (click Next/Install).
5. If a red error appears stating "Setup requires that the device is...", power-cycle the Gustard USB interface and re-seat the USB cable.
6. Click Finish upon successful installation. Select YES for any additional prompts.

Foobar2000 DSD Native Setup

To enable DSD native playback in Foobar2000, follow these steps:

1. Open the folder `foo_dsd_asio`. Run `ASIOProxyInstall-0.7.2.exe`. Click Next/Install to complete the installation.
2. Launch Foobar2000. Click `File` > `Preferences`.
3. In Preferences, go to `Components`. Click `Install...` and select both `foo_input_sacd.fb2k-component` and `foo_dsd_asio.fb2k-component` from the `foo_dsd_asio` folder.
4. Click `Apply`. Confirm the pop-up to restart Foobar2000.
5. After restart, navigate to `File` > `Preferences` again.
6. Expand `Playback` > `Output` > `ASIO`. Double-click `foo_dsd_asio`.
7. In the `foo_dsd_asio v0.7.2` window:
   • ASIO Driver: Select `Gustard USB Audio`.
   • DSD Playback Method: Select `ASIO Native`.
   • Configure other settings as needed (e.g., DSD to DSD Method, PCM to DSD Method, DSD/PCM Transition).
   Click `X` to close.
8. Go to `Tools` > `SACD` > `Output Mode: DSD`. Click `OK` to complete.

Foobar2000 DSD Playback Troubleshooting

1. Why is ASIO missing under Playback > Output in Preferences?

Cause: ASIO component not installed.

• Drag `foo_input_asio.fb2k-component` from `foobar2000_DSD 0.7.X` folder into the blank area of Foobar2000's Components panel.
• Click `Apply` > Confirm restart prompt.
• ASIO appears after relaunch.

2. Why is SACD missing under Tools?

Cause: SACD component not installed.

• Drag `foo_input_sacd.fb2k-component` from `foobar2000_DSD 0.7.X` folder into the blank area.
• Click `Apply` > Confirm restart.
• SACD appears after relaunch.

3. Why does DSD playback fail with this error despite correct settings?

Cause: Version conflict between ASIOProxy and SACD decoder components.

Solution: Correct version pairing is crucial. Both must be 0.7.X series.

Common Issue: Older Foobar2000 installations using SACD component v0.6.X with ASIOProxy v0.7.2.

Options:

• Option 1: Update SACD component per Solution 2 above. If components are locked:
  • Reinstall the latest official Foobar2000 release.
• Option 2: Without reinstalling Foobar2000:
  • Install legacy driver `ASIOProxyInstall-0.6.5.exe`.
  • Search online for verified download sources.

Specifications

Digital Inputs:

• COAX/OPT Input Support: PCM 16-24bit/44.1-192kHz; DSD DoP64
• USB/Streamer Input Support: PCM 16-32bit/44.1-768kHz; DSD DoP64-DoP256; Native DSD: DSD64-DSD512
• BT Bluetooth 5.0 Support: High-resolution codecs including LDAC, AAC, SBC, aptX, aptX LL, aptX HD.
• LDAC enables 24-bit/96kHz high-resolution transmission.
• USB Host Compatibility: Windows 7/8/10/11 (32 & 64-bit); macOS X; Linux

Analog Output:

• Frequency Response: 20Hz-20kHz (±0.2dB, OS Mode)
• Dynamic Range: >111dB
• Signal-to-Noise Ratio (SNR): >113dB
• Channel Crosstalk: -125dB @ 1kHz
• THD+N: ≤ 0.004% @ 1kHz
• IMD: ≈ 0.009% @ -2dBFS
• RCA Output Level: 2Vrms (Fixed)
• RCA Output Impedance: 100Ω
• XLR Output Level: 4Vrms (Fixed)
• XLR Output Impedance: 100Ω

Other Parameters:

• Power Supply: AC 115V/230V, 50/60Hz
• Power Consumption: <10W
• Dimensions (WxDxH): 220 × 170 × 50 mm (excluding protrusions)
• Net Weight: 1.5 kg
• Package Dimensions: 295 × 265 × 85 mm
• Shipping Weight: 2.0 kg

Warranty Information

Thank you for choosing HIFI products from the Gustard brand. To safeguard your rights and interests, please read the following warranty terms carefully. After-sales service is provided by Gustard.

Product Warranty:

You will enjoy a 2-year free warranty and lifetime maintenance after the date of purchasing your Gustard HIFI product.

The manufacturer bears only the freight from mainland China. Part of the freight and tax generated from overseas will be solved by the user with the dealer negotiation.

Free Warranty Service:

During the free warranty period, if the user uses the product in normal conditions and the product fails due to component quality or manufacturing problems, Gustard X30 will be repaired.

Beyond the Warranty Service:

Belonging to one of the following circumstances, products are no longer provided warranty service:

1. Products from the date of purchase has exceeded a predetermined warranty period.
2. Model, barcodes and purchase date do not match the actual product and warranty card.
3. Without GUSTARD technician permission, unauthorized modifications to the circuit, components or self-repaired product.
4. Damaging caused by irresistible natural forces.
5. Beyond the permitted use of environmental damage.
6. Damaging due to incorrect use or improper storage. Including but not limited to: the voltage is too high to burn the circuits or components; Bumping and resulting in damaging the shell or internal; damaging due to water, oil, liquid and excessive dust; product oxidation or corrosion, etc.
7. Beyond the warranty period, such as an individual component damage, appearance.

Due to human damage, firmware modifications lead to unable to work by unauthorized users. GUSTARD commits to take reasonable maintenance fees (except large area components or circuit board burned beyond repair). Freight and maintenance costs, material costs are required the user to bear.

Support and Contact

For further assistance or inquiries, please contact the manufacturer:

• Manufacturer: Shenzhen Goshide Technology Co., LTD
• Address: Room 302, Building 1, No. 28, Huimin 1st Road, Guanlan Sub-district, Longhua District, Shenzhen City, Guangdong Province
• Tel: +86-18682080102
• Website: http://www.gustard.com
• Email: service@gustard.com

Official User Manual Video

Watch the official user manual video for a visual guide on setting up and operating your Gustard AUDALYTIC DR70.