Perform the following procedure.
- Set the [LOOP BACK] switch to “OFF.”
- When you do this, you won’t be able to control the volume on your smartphone (if it is connected via USB) using the [HEADPHONE/SMARTPHONE OUT] knob. - While connected to the GO:MIXER PRO-X, select the “AUDIO RECORDER” on GarageBand.
- When the message “Audio Device Connected” appears after connecting to the GO:MIXER PRO-X, tap “Cancel.” - Tap
. - Tap [Channel] and set it to “Stereo.”
- Set [Monitor] to “Off.”
See "GO:MIXER PRO-X Using This Unit with Smartphone Apps" (PDF) for details on settings for recording with GarageBand for iOS.