PocketMac has introduced its new RingtoneStudio 2.0 for iPhone software for Mac OS X. RingtoneSudio lets users make an unlimited number of ringtones from any unprotected music file or from a large variety of QuickTime-ready video formats. Features of the new version include visual sound editing, volume control, fade in/fade out capabilities, full integration with QuickTime Pro, and improved integration of video and waveform editing. RingtoneStudio…