I grabbed a friends recording to patch with mine where I had an SD card failure. The waves from his recording have some weird features which I've never seen on any recording I've done.
I've attached a screen shot. Anyone? Don't sound distorted but there is some low end funkyness. I used some multi-band compress to cut subsonics and the wave form started to look more normal but is still missing dynamic range in the negative for both channels.
see attached jpg
You know what? I have seen this before and it was unexplaind then. It's the Marantz. I mastered all of the Jam Room recordings this year and Monty used a Marantz ACM671 and the above recording was an oade mod 661.