1. はじめに
The Audient EVO 8 is a compact and powerful 4-in/4-out USB audio interface designed for musicians, podcasters, and streamers. It features high-quality EVO preamps, advanced AD/DA converters, a JFET instrument input, and the innovative Smartgain function for effortless level setting. This manual provides detailed instructions to help you get the most out of your EVO 8.

Figure 1: Audient EVO 8 front view、ショーasing its sleek design and main control knob.
2. 主な特徴
- 4 EVO Mic Preamps: Studio-quality analog microphone preamps for accurate and clean audio capture.
- High-Quality AD/DA Converters: Provides 113dB of dynamic range for superior audio performance.
- 1 JFET Instrument Input: Designed to emulate the input stage of a classic tube amp, ideal for guitars and other instruments.
- Smartgain: Automatically sets your gain levels in less than 20 seconds.
- 2 Headphone Outputs: Dedicated outputs for monitoring.
- USB 2.0 Audio Interface: Reliable and fast connectivity.
- バンドルソフトウェア: Includes professional recording software compatible with Mac/Win.

Figure 2: Visual representation of the Audient EVO 8's core features.
3. セットアップ
3.1 パッケージ内容
- Audient EVO 8 Audio Interface
- USB-C - USB-A ケーブル
- クイックスタートガイド
3.2 Connecting the EVO 8
Connect the EVO 8 to your computer using the provided USB-C to USB-A cable. For optimal performance, especially with AMD setups, a USB-C Female to 3.1 Male adapter may be required to ensure stable connectivity and prevent latency issues. The EVO 8 is bus-powered via USB, but for full 48V phantom power on all four channels, a USB-C to USB-C connection is recommended if your computer supports it.

図3:背面 view of the EVO 8 showing USB-C port, line outputs, and combo inputs.
3.3 ドライバのインストール
Before connecting your EVO 8, download and install the latest drivers and the EVO software mixer from the official Audient website. This software is crucial for controlling the interface's features and routing audio.
3.4 マイクと楽器の接続
- マイク: Plug your XLR microphones into the combo jacks (Inputs 1-4) on the rear panel. For condenser microphones, ensure 48V phantom power is enabled for the respective input.
- 楽器: Connect your guitar or bass directly into the JFET instrument input (Input 1) on the front panel.

Figure 4: Front panel of the EVO 8 with instrument input and headphone outputs.
3.5 ヘッドフォンとスピーカーの接続
- ヘッドフォン: Plug your headphones into either of the two 1/4-inch headphone outputs on the front panel.
- 講演者: Connect your studio monitors to the 1/4-inch line outputs (1L/2R, 3L/4R) on the rear panel.
4. 操作
4.1 Smartgain
The Smartgain feature automatically sets the gain for your inputs. To use it, simply press the Smartgain button (green microphone icon) and play or sing into your microphone/instrument. The EVO 8 will analyze the input and set the optimal gain level in seconds.

Figure 5: The Smartgain button on the EVO 8 for automatic level setting.
4.2 Controlling Input Levels and Monitor Mix
The large central knob controls various parameters depending on the selected mode. Press the numbered buttons (1-4) to select an input and then turn the knob to adjust its gain. Use the monitor buttons to control headphone and speaker output levels. The EVO software mixer provides a visual interface for all controls, allowing for precise adjustments and routing.
4.3 EVO Software Mixer
The EVO software mixer provides comprehensive control over your audio routing and levels. You can adjust individual input gains, mute/solo channels, and manage the master mix. For stereo inputs (like gaming audio from a PC), you can link two mono inputs (e.g., 3 and 4) to create a stereo track within the software.
To ensure all audio from your streaming PC is heard through the EVO 8, set the loop-back source in the EVO software to 'Loop-back 1+2' or 'Master Mix'. This routes your PC's audio back into the interface for monitoring and streaming.
5。 トラブルシューティング
- Noisy Preamps/Audio Issues: Ensure all cables are securely connected. For AMD systems, consider using a USB-C to USB-A 3.1 adapter to resolve potential latency or glitching issues.
- No Sound/Microphone Input: Verify that the correct input is selected on the EVO 8 and in your computer's sound settings. Check phantom power for condenser microphones. Ensure the EVO software mixer is running and configured correctly.
- Software Slowness: Update your computer's drivers, especially USB and chipset drivers. Close unnecessary background applications.
- グラウンドループノイズ: If you experience humming or buzzing, consider using a ground loop noise isolator on the audio connections between your PC and the EVO 8.
6. 仕様
| 属性 | 価値 |
|---|---|
| アイテム重量 | 1.05ポンド |
| 製品寸法 | 2.76 x 7.48 x 2.76インチ |
| 商品型番 | エボ8 |
| 対応デバイス | パソコン |
| コネクタタイプ | USB2.0 について |
| ハードウェアインターフェイス | USB |
| サポートされているソフトウェア | iOS |
| オペレーティング·システム | ウィンドウズ |
| チャンネル数 | 8 |
7. メンテナンス
- 本体は乾いた柔らかい布で拭いて清潔に保ってください。
- 極端な温度、湿度、直射日光にさらさないでください。
- 過熱を防ぐために適切な換気を確保してください。
- Regularly check for firmware updates on the Audient website for improved performance and new features.
8. 保証とサポート
For warranty information and technical support, please refer to the official Audient web購入サイトをご覧いただくか、カスタマーサービスまでお問い合わせください。保証請求の際に必要となりますので、購入証明書を保管してください。





