Also on Thursday, a forensics expert testified Mr Bacanovic used a different ink to make a notation next to an entry for ImClone stock on a worksheet of Ms Stewart's stock sales.

BBC: NEWS | Business | Friend's testimony hits Stewart

As Harmonix's John Drake explained, the developer's got a team of audio experts listening to master tracks and watching live performances to ensure they're giving you the most accurate tablature possible, so if you take issue with their notation, well, you're gonna have quite an uphill battle trying to make your case.

ENGADGET: Rock Band 3 Pro guitar preview: the guitarist vs. the guitar hero