1. Yes, there IS A FIRMWARE update (it is different and distinct from the Windows drivers you mentioned)

http://www.roland.com/support/article/?q=downloads&p=SONIC%20CELL&id=1812278

There are three downloads on that page:
-- a README.PDF - that you REALLY need to READ first (even though the readme is last thing on the web page)

- a sonic_cell_up.bin file in zip format (it is the actual firmware update to be applied), and

- a PDF list explaining what was changed/updated - tech geek crap

2. UNCLE, at least for me, I think we have come about 6 pi degrees (a circle and a half - and back to might be ground loop somewhere) on when/how you get noise. Sorry, couldn’t help. Let us know if/when this gets corrected - good luck.

Larry

Last edited by Larry Kehl; 01/22/14 06:31 PM.