Why not implementing the Bob Katz Kmeter inside Renoise ?
As it is Open Source, it would be easy to do it.
IMO Renoise needs more professional tools to do sound measurements.
This is the type of meter you want for live recording, mixing and mastering.
A K-meter displays both the true RMS level and the digital peak level.
Its licensed under GNU. If we would simply include it, we either would have to steal it or have to make Renoise GNU (open source). Thats how open source software works, and its good that it works that way. Else everyone could steal free software and sell it.
There’s actually nothing stopping you from selling most open source software, a large chunk of which falls under the GPL. GPL plainly states that sale of the resulting software must be allowed. The only stipulation is that the software you’ve just coerced someone into paying for must retain the GPL license… thus it may infuriate the customer once they realize they’ve been taken for some cash. GNU is free as in thought, not free as in beer… you should be free to do with GPL software as you wish.
… well at least, you can do everything but relicense it