Dave Pensado recommends these free plug-ins: source: Apparently, ( and I didn't know this, or if I did, I'd forgotten) there are some versions of PT that don't have a phase-checking feature. Pensado ( being the Avid fan that he is) recommends inserting this into the Master Bus: http://www.bozdigitallabs.com/product/panipulator/ ( I suppose this would work with any popular DAW platform, although many DAW's already have phase-checking included as stock processors... I know Samplitude does.) He also suggests these from Tokyo Dawn Labs: http://www.tokyodawn.net/tokyo-dawn-labs/ Slick EQ, ( which is an EQ, as its name implies) TDR Kotelnikov, ( Stereo Bus Compression) TDR Compression ( Feed-back design instead of Feed-Forward ) Proximity, ( a pan-distance processor based on several psycho-acoustic models/algorithms). All are available as VST 64 ( and 32), AAX and AU formats. So, PC or Mac. I haven't personally tried any of these yet, so I can't comment or review; I just thought I'd post the links for those who might be interested. d.