Yes you can do it.
Use the 3-state switch "external audio input":off/VcaOut/Ext.
In the VcaOut position, this switch allow you to connect the Vca ouput of the miniMg V to the external audio input. But be carefull, there is 1 mS of fixe latency, so you will get phasing effect which become audible in high frequency.
But in low frequency it do the job : see K.Ujiie->Basses->K.U_neoAcid