Hmm... problem went away randomly. The post is too old to change the title to "...seemed broken for a minute there", so sorry for crying wolf.

But it got me thinking. The square wave made me wonder if there was some form of anti-denormal square-wave injection at work (maybe it was being inserted into the MSB rather than the LSB of the 64-bit signal)?

It would be good to know if this technique is indeed used - if so, the bitwise operators wouldn't be 100% exact.

While I'm on the subject, does anyone know if there is a tiny error margin for equality in the MSP comparison operators, or are they bit-for-bit exact?

Argh! It's come back again. Try this patch to hear the devil square:

Yep, that was horrible!

Bug report filed!

Please try Max 6.0.1. I believe this bug was fixed.

Thanks Andrew. I'm away from my iLok right now, but I'll check it out later. FWIW, the changelog only mentions [bitsafe~] being fixed.