Overview
By default, the MX-1 as an internal sampling rate of 96k. This can be changed to 48k, and 44.1k. If you are running a session at 48k with the MX-1 as the sound-card, you should check that the MX-1 is changed accordingly. This also pertains to the Digital Input/Output jack. The connected piece of gear should share the same sample rate as the MX-1 in order to hear it correctly.
Process
To change the sample rate:
1. While holding down the [GAIN] button, turn on the power.
2. Use the buttons, knobs and the pads to change the settings.
3. Press the [BFX] button and turn the [VALUE] knob. This will change the sample rate.
4. Press [START/STOP] button to save the settings.
FYI...
Other AIRA pieces have a fixed sample rate of 96k. The MX-1 can down-sample every AIRA piece, making them compatible with sessions outside of 96k!