I just want to give Pa3x owners a tip to improve the overall sound of your setup.

I had fidelity problems when recording Mp3 files on the computer because of very loud background hiss noise so I thought it would be a good idea to buy an external Audio to Usb device. But I thought my Pa3x and Psr s900 already have included Mp3/wav recorders. Being the Pa3x my main instrument I tried connecting my MS, Psr and Korg TR to the mixer and then to the Pa's line in. What a surprise I took when I found the hiss noise decreased a lot, at least can hardly be heard when I record an Mp3 directly from the Pa3x but also discovered the input sound was processed by Maxx Audio. I can assure you now I feel I have a new Psr, MS and TR. The psr s900's guitars, pianos and saxes sound like brand new, the drumkits sound still compressed (can't be done much on this subject with these Yamaha models )
I can still hear some hiss when the volume is set high I think coming from the mixer (a simple Phonic).

You can try this and see the improvement. Now my psr s900 became an s950