AOSHIDA Gustard U18 USB Digital Interface Instruction Manual

導入

The Gustard U18 is a high-performance USB Digital Interface designed to enhance your audio system. It functions as a ground isolation USB bridge and a hi-end audio interface, supporting high-resolution audio formats such as DSD512 and PCM768K. Featuring advanced components like the XMOS XU216 processor, K2 clock synthesizer, and AS338 audio oscillators, the U18 provides multiple output interfaces including IIS, AES, Optical, Coaxial, and Clock outputs for versatile connectivity with various audio devices.

安全上の注意

• このユニットは、直射日光、熱源、振動、ほこり、湿気、寒さを避け、風通しがよく、涼しく、乾燥した、清潔な場所に設置してください。
• 指定されたボリュームのみを使用してくださいtage for this unit. Using this unit with a higher voltage than specified is dangerous and may cause fire, damage to this unit, or personal injury. The manufacturer is not responsible for any damage resulting from the use of this unit with an incorrect voltage.
• Do not attempt to modify or repair this unit yourself. Contact the salesperson or customer service when any service is needed. The cabinet should never be opened for any reason.
• 長期間（休暇中など）本機を使用しない場合は、電源ケーブルを AC 壁コンセントから抜いてください。

特徴

• XMOS XU216 プロセッサ: Equipped with 16 cores for rich resources and a smooth audio experience, supporting DSD512 and PCM768K.
• Independent CPLD for Signal Shaping: The isolated IIS signal is reshaped to remove jitter introduced by the isolator.
• Complete Grounding Isolation: Achieved by a 200 Mbps isolator to eliminate all interference from your PC.
• 2nd Generation K2 Clock Synthesizer: Features ultra-low noise and supports external OCXO. K2 can generate audio-specific frequencies using a 10MHz clock source with extremely low loss.
• Accusilicon AS338 Hi-End Audio Oscillators: Two AS338 oscillators ensure strict requirements, packaged with nitrogen gas and 100% checked by phase noise analyzer. Jitter is as low as 38fs, improving bass quality and harmony.
• LT3045 Linear Regulator: The clock power supply is based on LT3045, a high-performance low dropout linear regulator with an RMS Noise of only 0.8µVRMS (10Hz to 100KHz).
• Configurable IIS Pinout: Offers 4 modes for compatibility with various DACs.
• 豊富なインターフェース: Includes USB, IIS-H, AES, Coaxial, Optical, and Clock inputs/outputs.

パッケージ内容

Upon unboxing your Gustard U18, please verify that all the following items are included:

• Gustard U18 USB Digital Interface Unit
• USBケーブル
• AC電源ケーブル
• ユーザーマニュアル
• 保証書

画像： A visual representation of the Gustard U18 unit and its included accessories, such as cables and documentation.

製品終了view

フロントパネル

画像： フロント view of the Gustard U18, showing the display screen, REF button, and IIS button.

• 表示画面: 現在のステータスと設定を表示します。
• REFボタン: Used for input selection or other reference functions.
• IIS Button: Used for IIS pinout configuration or DSD flag settings.

背面パネル

画像： 後方 view of the Gustard U18, highlighting all input and output ports.

• 光出力: Digital audio output via optical fiber.
• AES 出力: Professional digital audio output via XLR connector.
• COAX Output: Digital audio output via coaxial cable.
• IIS Output: Digital audio output via HDMI connector (not standard HDMI video).
• WCK Output: Word Clock output.
• 10M CLK Input: Input for external 10MHz clock.
• USB入力： USB Type-B female connector for connecting to a computer or other USB audio source.
• 巻tage Switching (110/220V): 適切な入力ボリュームを選択するためのスイッチtage.
• 電源入力: AC 電源コネクタ。
• 電源スイッチ： 主電源のオン/オフスイッチ。
• ヒューズ： 電源保護用のヒューズホルダー。

設定

Follow these steps to set up your Gustard U18:

1. 電源接続: ボリュームを確保するtage switch on the rear panel is set to the correct local voltage (110V or 220V). Connect the supplied AC power cable to the unit's power input and then to a wall outlet.
2. USB Source Connection: Connect your audio source (e.g., PC, Android device, iOS device, PS5, Nintendo Switch) to the USB入力 on the rear panel using the provided USB cable.
3. オーディオ出力接続： Connect the Gustard U18 to your DAC or amplifier using one of the available digital outputs: IIS 出力 (via HDMI cable, ensure your DAC supports IIS over HDMI), AES出力, 同軸出力、 または 光出力. Choose the output that best suits your receiving device.
4. 外部クロック（オプション）: If you are using an external 10MHz clock, connect it to the 10M CLK Input.
5. 電源オン: 裏返す 電源スイッチ on the rear panel to the 'ON' position. The front display screen will illuminate.
6. ドライバーのインストール（PCの場合）: For Windows operating systems, you may need to install specific drivers. Refer to the official Gustard website for the latest drivers. macOS and Linux typically do not require additional drivers.

操作手順

The Gustard U18 features intuitive controls for seamless operation:

• 入力選択: を押す REFボタン on the front panel to cycle through the available digital inputs (USB, Optical, Coaxial, 10M CLK). The selected input will be indicated on the display screen.
• IIS Pinout Configuration: The IIS output has 4 configurable modes. Press the IIS ボタン to change the pinout mode. The current mode will be displayed. Please confirm your DAC's pinout before changing this option. Only these 4 modes are supported.
• DSD Flag Setting: 長押し IIS ボタン to change the DSD Flag setting. This is important for proper DSD signal recognition by your DAC.
• 情報を表示します。 The front display screen provides real-time information about the active input, sampling rate, and DSD status.

仕様

トラブルシューティング

If you encounter issues with your Gustard U18, please refer to the following common troubleshooting steps:

• 電源なし: Ensure the AC power cable is securely connected to both the unit and the wall outlet. Check the power switch position and the fuse. Verify the voltagスイッチは正しく設定されています。
• サウンド出力なし:
  • Verify the correct input is selected on the U18 using the REF button.
  • Check all audio cables (USB, IIS, AES, Coaxial, Optical) for secure connections.
  • Ensure your DAC/amplifier is powered on and the correct input is selected on that device.
  • If using IIS output, confirm the IIS pinout mode on the U18 matches your DAC's requirements.
  • For PC connections, ensure the correct audio driver is installed and selected as the output device in your operating system's sound settings.
• Intermittent Audio/Signal Drops:
  • Check USB cable quality and connection. Try a different USB port or cable.
  • Ensure your computer's USB port is providing stable power.
  • Minimize other USB devices connected to the same hub or computer.
  • If using an external clock, ensure it is stable and properly connected.
• 歪んだ音:
  • を確認しますampling rate and bit depth settings on your source device match the capabilities of the U18 and your DAC.
  • ケーブルの接続が緩んでいないか確認してください。

If the problem persists after trying these steps, please contact AOSHIDA customer support for further assistance.

メンテナンス

To ensure the longevity and optimal performance of your Gustard U18, follow these maintenance guidelines:

• クリーニング： 本体の外側は、柔らかく乾いた布で拭いてください。研磨剤入りの洗剤、溶剤、化学薬品スプレーの使用は避けてください。表面の仕上げが傷つく可能性があります。
• 換気： Ensure the unit has adequate ventilation. Do not block the ventilation holes or place the unit in an enclosed space that restricts airflow.
• ストレージ： When not in use for extended periods, store the unit in a cool, dry place, away from direct sunlight and extreme temperatures. Disconnect the power cable.
• ケーブル接続: すべてのケーブル接続が安全で損傷がないことを定期的に確認してください。

保証とサポート

AOSHIDA provides comprehensive support for its products, including the Gustard U18 USB Digital Interface.

• 保証期間: The product comes with a one-year free repair period, which may be extended depending on the specific brand and product. Please refer to your warranty card for detailed terms and conditions.
• 返品規則： 30 日間の返品ポリシーが適用されます。
• 顧客サービス： 24-hour online service is available for any questions or assistance you may need.
• 連絡先： For consulting and after-sales service, please contact our after-sales team via email at service@aoshida-audio.com.