BOYA BY-AM4 Dual-Channel Audio Interface User Manual

1. Introduction

Thank you for choosing the BOYA BY-AM4 Dual-Channel Audio Interface. This professional-grade audio interface is designed to provide high-quality audio input and output for a variety of applications, including recording, live streaming, podcasting, and music production. Its versatile connectivity and intuitive controls make it an essential tool for creators seeking superior sound performance.

Please read this manual thoroughly before using the BY-AM4 to ensure proper operation and to maximize its potential.

2. Product Overview

The BOYA BY-AM4 features a robust design with essential controls and ports for seamless audio integration.

2.1. Package Contents

• BOYA BY-AM4 Audio Interface
• USB Cable
• User Manual
• (Additional accessories may vary by region)

2.2. Device Layout

Figure 2.2.1: Front view of the BOYA BY-AM4, showing input gain controls, MIDI, 48V, Denoise, Loopback, Direct monitoring buttons, and master monitor volume.

Figure 2.2.2: Rear view of the BOYA BY-AM4, displaying DC 5V power input, Phone output, USB port, MIDI IN/OUT, and Line Outputs (R/L).

Figure 2.2.3: Side view of the BOYA BY-AM4, showing Input 1 and Input 2 combination XLR/TRS jacks.

2.3. Controls and Indicators

• GAIN 1/2 Knobs: Adjusts the input gain for Input 1 and Input 2.
• LINE/INST Switches: Toggles between Line level and Instrument level input for each channel.
• MIDI Button: Activates/deactivates MIDI functionality.
• 48V Button: Engages +48V phantom power for condenser microphones on both inputs.
• DENOISE Button: Activates noise reduction feature.
• LOOPBACK Button: Enables loopback function for recording computer audio output.
• DIRECT Button: Toggles direct monitoring, allowing you to hear your input signal without latency.
• MONITOR Knob: Controls the overall output volume for headphones and line outputs.
• HEADPHONE Output: 6.35mm (1/4") stereo jack for connecting headphones.
• DC 5V Input: Power input port.
• PHONE Output: 3.5mm (1/8") stereo jack for connecting headphones or external devices.
• USB Port: Connects the interface to a computer or mobile device.
• MIDI IN/OUT: 5-pin DIN connectors for MIDI devices.
• LINE OUTPUTS (R/L): Balanced TRS outputs for connecting to studio monitors or amplifiers.
• INPUT 1/2: Combination XLR/TRS jacks for connecting microphones or instruments.

3. Setup

Follow these steps to set up your BOYA BY-AM4 audio interface:

1. Power Connection: Connect the provided DC 5V power adapter to the "DC 5V" input on the rear panel of the BY-AM4. Plug the adapter into a power outlet.
2. USB Connection: Connect the BY-AM4 to your computer (Windows, macOS, Linux) or mobile device (iOS, Android) using the supplied USB cable. The device should be recognized automatically, and necessary drivers will typically install themselves.
3. Input Devices:
   • For microphones (XLR): Connect your microphone to INPUT 1 or INPUT 2. If using a condenser microphone, press the 48V button to supply phantom power.
   • For instruments (TRS): Connect your instrument (e.g., guitar, bass) to INPUT 1 or INPUT 2 using a 1/4" TRS cable. Ensure the corresponding LINE/INST switch is set to "INST".
   • For line-level devices (TRS): Connect line-level sources (e.g., keyboards, mixers) to INPUT 1 or INPUT 2 using a 1/4" TRS cable. Ensure the corresponding LINE/INST switch is set to "LINE".
4. Output Devices:
   • Headphones: Connect your headphones to the 6.35mm (1/4") HEADPHONE output or the 3.5mm (1/8") PHONE output.
   • Studio Monitors/Speakers: Connect your studio monitors or powered speakers to the LINE OUTPUTS (R/L) using balanced TRS cables.
5. Software Configuration: Open your Digital Audio Workstation (DAW) or recording software. Go to the audio settings/preferences and select "BOYA BY-AM4" as your audio input and output device.

4. Operating Instructions

Understanding the controls of your BY-AM4 will help you achieve optimal audio quality.

4.1. Input Gain Adjustment

Use the GAIN 1 and GAIN 2 knobs to adjust the input level for each connected microphone or instrument. Aim for a strong signal without clipping (distortion). Most DAWs will have input meters to help you monitor levels.

4.2. Phantom Power (48V)

Press the 48V button to supply +48V phantom power to condenser microphones. Ensure your microphone requires phantom power before activating this feature. Dynamic microphones do not require phantom power.

4.3. Denoise Function

Activate the DENOISE button to engage the built-in noise reduction. This can help reduce background hiss or hum, especially in noisy environments. Experiment with this feature to find the optimal setting for your recording.

4.4. Direct Monitoring

Press the DIRECT button to enable direct monitoring. This allows you to hear your input signal directly through the interface's outputs (headphones, line outputs) with zero latency, bypassing your computer's processing. This is crucial for real-time performance and recording.

4.5. Loopback Function

The LOOPBACK function allows you to record audio playing on your computer (e.g., from YouTube, Spotify, or a video game) simultaneously with your microphone or instrument input. This is particularly useful for live streaming, podcasting, or creating content that combines multiple audio sources.

4.6. MIDI Connectivity

The BY-AM4 includes MIDI IN/OUT ports. Connect your MIDI keyboard, controller, or other MIDI devices to these ports. Press the MIDI button to ensure MIDI functionality is active. Your DAW will recognize the BY-AM4 as a MIDI interface, allowing you to send and receive MIDI data.

4.7. Output Volume Control

Adjust the MONITOR knob to control the overall output volume for your headphones and line outputs. Always start with a low volume and gradually increase it to a comfortable listening level.

5. Maintenance

Proper care will extend the life of your BOYA BY-AM4:

• Keep the device clean by wiping it with a soft, dry cloth. Do not use liquid cleaners or solvents.
• Avoid exposing the device to extreme temperatures, humidity, or direct sunlight.
• Do not drop or subject the device to strong impacts.
• Store the device in a cool, dry place when not in use.
• Ensure all cables are connected securely but do not force them.

6. Troubleshooting

7. Specifications

8. Warranty and Support

BOYA products are designed for reliability and performance. For information regarding warranty coverage, technical support, or service, please refer to the warranty card included with your product or visit the official BOYA website. Keep your purchase receipt as proof of purchase for warranty claims.

For further assistance, you may contact BOYA customer support through their official channels.

9. Official Product Videos

Currently, there are no official product videos available from the seller for the BOYA BY-AM4 audio interface. Please check the manufacturer's website or official channels for future updates and video tutorials.