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Question: How can I trim the input gain on a channel on my VoiceSolo FX150 Answer: This is how: Make sure that the your FX150 is in channel 1 mode. This is found on the back of the FX150, there is a small button that switches from CH1 to Full Mix mode. Please note, the input trim is only available for the first channel. 
  • Press and HOLD the LEVEL button on channel one. Use the Edit knob to increase or decrease the gain.
  • Press the LEVEL button again to confirm your changes and exit.