USB Audio Interface Instruction Manual

Introduction

This manual provides detailed instructions for the setup, operation, and maintenance of your new USB Audio Interface. Designed for professional recording, podcasting, and live streaming, this device offers studio-quality audio capture with essential features like 48V phantom power and low-latency monitoring. Please read this manual thoroughly to ensure optimal performance and longevity of your audio interface.

1. Setup

1.1 What's in the Box

Carefully unpack your USB Audio Interface and ensure all components are present:

• USB Audio Interface Unit
• USB-A to USB-B Cable
• USB-C to USB-B Cable
• Instruction Manual (this document)

Figure 1: Package Contents

1.2 Connecting to Your Computer

1. Connect one end of the provided USB cable (USB-A or USB-C, depending on your computer's port) to the USB-B port on the rear of the audio interface.
2. Connect the other end of the USB cable to an available USB 2.0 port on your computer.
3. The "POWER" indicator on the front panel should illuminate, indicating the device is receiving power.

1.3 Connecting Microphones and Instruments

The USB Audio Interface features two Combo input sockets (INPUT 1 and INPUT 2) that accept both XLR and 1/4 inch (6.35 mm) jacks.

• XLR Microphones: Use XLR cables to connect professional studio condenser microphones or dynamic microphones to INPUT 1 or INPUT 2.
• Instruments/Line-Level Signals: Connect instruments (like guitars or basses) or line-level devices using 1/4 inch (6.35 mm) TS or TRS jack plugs to INPUT 1 or INPUT 2. INPUT 1 also features a Hi-Z switch for high-impedance instruments like electric guitars.

Figure 2: Front Panel Overview

Figure 3: Front and Rear Panel Diagram

1.4 Phantom Power (+48V)

The audio interface provides switchable +48V phantom power for condenser microphones. Observe the following precautions:

• When the phantom power switch is turned on, the "+48V" light will illuminate, supplying DC +48V to the XLR socket.
• If phantom power is not required for your microphone (e.g., dynamic microphones), ensure the switch is OFF.
• To prevent noise and potential damage, do not connect or disconnect microphones when phantom power is active.
• Before activating or deactivating phantom power, it is recommended to turn the channel gain knobs to their minimum setting.

2. Operation

2.1 Gain Control and Signal Indicators

Each input channel (GAIN 1, GAIN 2) has an independent gain control knob. Adjust these knobs to set the input level for your microphone or instrument.

• SIG (Signal) Indicator: Illuminates green when an audio signal is detected.
• PK (Peak) Indicator: Illuminates red when the input signal is too high and clipping (distortion) is occurring. Reduce the gain immediately if this light appears.

Figure 4: Gain Controls and Indicators

2.2 Direct Monitoring (Zero Latency)

The USB Audio Interface features direct monitoring, allowing you to hear your input signal with zero latency (no delay) while recording. This is crucial for accurate performance and monitoring.

• Engage the MON (Monitor) switch to activate direct monitoring.
• Use the MIX knob to balance the direct input signal (INPUT) with the playback from your computer (DAW).
• Connect headphones to the PHONES output for private monitoring. Adjust the PHONES knob for headphone volume.

Figure 5: No-Latency Monitoring

2.3 Low Cut Filter

The GAIN 2 channel includes a "Low Cut" button. When activated, this filter reduces low-frequency rumble and unwanted noise, which can be useful for vocal recordings or instruments that don't require strong bass frequencies.

2.4 Loopback Function

The "LoopBack" feature allows you to record the audio output from your computer (DAW) along with your live input signals. This is particularly useful for live streaming, podcasting, or creating content where you need to capture both your voice/instrument and computer audio simultaneously.

2.5 Output Controls

• OUT Knob: Controls the overall output volume to your studio monitors or other playback devices connected to the main outputs.
• PHONES Knob: Controls the volume for the headphone output.

Figure 6: Recording Setup Example

Figure 7: Instrument Recording Example

3. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use liquid cleaners or solvents.
• Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Cable Care: Avoid bending or crimping cables excessively. Always grasp the plug, not the cable, when disconnecting.

4. Troubleshooting

5. Specifications

6. User Tips

• Optimal Gain Staging: Always set your input gain (GAIN 1/2) so that the SIG light is consistently green, and the PK light only flashes occasionally during the loudest parts of your performance. This ensures a strong signal without distortion.
• Utilize Direct Monitoring: For recording vocals or instruments, always engage the MON switch and use the MIX knob to blend your live input with your DAW playback. This eliminates distracting latency.
• Experiment with Low Cut: If your recordings sound muddy or have unwanted low-frequency noise, try engaging the "Low Cut" filter on GAIN 2.
• Software Setup: Ensure your Digital Audio Workstation (DAW) is configured to use the USB Audio Interface as its input and output device for best results.

7. Warranty and Support

For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.