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This is my personal setup, love my Mojo / Ether-C combo, looking forward to getting my hands on the 1.1 upgrade foam in the near future.
On my Sony Z3 tablet I can change the destination folder by: Menu button top left > Settings > Offline section > Download Destination > Internal...
Have you tried experimenting with the tuning pads? I was experimenting with mine last night with one or two black ones in, I was listening to...
My bad, sorry I did not realise this, I've not really used my Mojo in line out mode much.