Hello everyone, here I play the piano and guitar and wanted to know if this unit allowed me to save initially my guitar in a second my piano and my voice finally afterwards? I also wanted to know if the jacks guitar and synth could connect tt forth on the case in order to have a better sound? Finally, I wanted to know if you would advise me to buy this product to save my little personal compositions finally whether it was a good buy for this? Thank you in advance