I am upgrading but have some plug-ins that work in OS9 and in the 4.7 version that I like to use for final mixing. My question is this, will 4.7 open up a logic song created in 7.0 and allow me to add an eq effect, save it in 4.7, and then reopen again in 7.0? Will any of this processing sequence affect sound quality and integrity? Thanks.