How To Set Up and Use the Rockville Line8 USB Mixer

Introduction:

This article will guide you step by step through setting up and using your Rockville Line8 USB Mixer. The instructions are simple and suitable for users of all experience levels. You’ll learn about the mixer’s controls, how to connect microphones and instruments, and how to use it with speakers, other mixers, and computers. Requirements include the Rockville Line8 USB Mixer, the included USB cable and power brick, and any microphones, instruments, or speakers you wish to connect. For computer use, ensure you have the appropriate USB adapter if needed.

Step-by-Step Instructions

1. Understanding the Mixer Controls and Connections
   • The back of the mixer features all input and output ports for Group A and Group B.
   • The mixer can operate in two modes:
     • Four Channel Mode: Inputs on Group A output to Output A; inputs on Group B output to Output B.
     • Eight Channel Mode: All inputs are summed and output through both Output A and Output B.
   • Use the mode switch to select between four channel (button pressed in) and eight channel mono (button out).
   • There is a headphones output for monitoring.
   • The USB input is used for power or connecting to a computer.
   • The front panel includes:
     • Channel knobs for Group A and Group B.
     • Peak lights to indicate if channels are peaking.
     • Mic/Line switch for each group (mic preamp mode or line mode).
     • USB Audio In switch for monitoring computer audio.
     • Phones level knob for headphone volume.
     • Master level knob for overall output volume.
2. Basic Setup with a Powered Speaker
   • Connect one end of a quarter-inch cable to an output on the mixer and the other end to a channel on your powered speaker.
   • Connect your microphone to the mixer using a female XLR to quarter-inch cable (plug XLR into the mic, quarter-inch into the mixer input).
   • Connect your instrument (e.g., guitar) to the mixer using an instrument cable.
   • Set the mixer to eight channel mono mode if you want all inputs summed together.
   • Set Group A to mic mode for microphones and Group B to line mode for instruments.
   • Adjust the channel and master level knobs on the mixer and the speaker’s channel level as needed.
   • Test by speaking into the microphone and playing the instrument to ensure both are heard through the speaker.
3. Using the Line8 USB with Another Mixer
   • Example: Two microphones in Group A and three instruments in Group B, each group to its own mixer channel.
   • Connect Output A of the Line8 to one channel on your mixer and Output B to another channel using quarter-inch cables.
   • Set the mixer to four channel mode (button pressed in) to keep groups separate.
   • Set Group A to mic mode and Group B to line mode as appropriate.
   • Adjust levels on both the Line8 and your mixer to ensure proper signal flow.
   • For saving space, you can use eight channel mode and connect only one output (A or B) to a single channel on your mixer. All inputs will be summed together.
4. Connecting the Line8 USB to a Computer
   • Compatible with both Mac and PC. For newer Macs, use a USB-A to USB-C adapter if needed.
   • Connect the USB cable from the mixer to your computer.
   • If prompted, allow the connection on your computer.
   • Go to your computer’s sound settings:
     • Set the output device to “USB Audio Codec” (may appear as such).
     • Set the input device to “USB Audio Codec.”
   • You can monitor audio through speakers connected to the mixer’s outputs or through headphones.
   • To hear computer audio (e.g., YouTube, Spotify, DAW), press the USB Audio In button.
   • To avoid feedback while recording, leave the USB Audio In button open (not pressed).
5. Using the Line8 USB with a Digital Audio Workstation (DAW)
   • In four channel mode, connect microphones or instruments to Group A or B.
   • In your DAW (e.g., GarageBand), create a new track and select the appropriate input (Input 1 for Group A, Input 2 for Group B).
   • Set Group A to mic mode for microphones and Group B to line mode for instruments.
   • Adjust the level knobs as needed.
   • To record all inputs together, use eight channel mono mode and select either input in your DAW.

Troubleshooting & FAQs

Q: Why am I not hearing any sound from my microphone or instrument?

• Ensure all cables are securely connected.
• Check that the correct mode (mic or line) is selected for each group.
• Make sure the channel and master level knobs are turned up.
• Confirm the mixer is powered on.

Q: I hear a feedback loop when recording with my computer. What should I do?

• Leave the USB Audio In button open (not pressed) while recording to prevent feedback.

Q: My computer does not recognize the Line8 USB.

• Make sure the USB cable is properly connected.
• If using a Mac, ensure you have the correct USB adapter.
• Check your sound settings and select “USB Audio Codec” as both input and output devices.

Q: Can I use the mixer with both Mac and PC?

• Yes, the Line8 USB is compatible with both. Use the appropriate USB adapter if needed.

Q: How do I keep microphones and instruments on separate tracks in my DAW?

• Use four channel mode and connect microphones to Group A and instruments to Group B. Assign each group to a separate input in your DAW.

Conclusion

The Rockville Line8 USB Mixer offers flexible options for connecting microphones, instruments, speakers, other mixers, and computers. By following the steps above, you can set up your mixer for a variety of uses, from live sound to recording.