I've located the Readme txt file and it does indeed give a lot of information about how to get this working on a RPi3.
Bottom line:
- it will run pretty well at 29.4kHz sampling rate
- there's a ton of tweaks and fiddling in the Linux installation to prevent cracks and pops
- audio card required (of course)
I can see this would take me a lot of trial and error as someone who has only dabbled in Linux. More time than I have available.
If someone with the right skills was able to do all the tweaks in Linux to get this working on a Pi3 they could share share the SD card image for the Linux installation on this forum, and recommend a soundcard.
It would then be easy for a newbie to implement PTQ6 on their own Rpi3.
That would be revolutionary.