Hi, Mike, In looking at the free R8brain SRC, the filter is down 6 dB at 20 kHz. The pro versions do better. But it does look great, overall. The overall phase response and the impulse is 180 degrees out of polarity, so one needs to do a polarity reversal after running it through the free one. Just sayin' if you're using this in an archive/professional situation things to be aware of. It certainly looks better than some of the commercial products tested. Cheers, Richard On 2011-12-07 12:34 PM, Mike Hirst wrote: > I have used r8brain and found it to be solid and reliable. > > On 06/12/2011 21:57, L. Hunter Kevil wrote: >> Thanks very much indeed to Richard, Corey, David, Shai, and Eric. >> >> iZotope& Weiss look very tempting, but my purchasing manager - the >> better >> half - says no go, too much dough. But I may not be stuck. Eric's >> reference >> to the infinitewave site is very revealing. >> >> http://src.infinitewave.ca/ >> >> It shows that R8brain free seems to have no artifacts, like iZotope, >> at the >> cost of an inverted phase pulse and a low-pass cutoff a bit lower than >> usual. Its website is here: >> >> http://www.voxengo.com/product/r8brain/ >> >> I don't have much choice at the moment, but does anyone have any >> comments >> about this? Am I reading the infinitewave data correctly? >> >> TIA, >> >> Hunter >> > -- Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.