I was looking for a tool to batch normalize the samples in a multi-sample instrument and this tool does the job perfectly, thanks! 
Gui/functionality reminds me of Johann’s old ‘run cmd on selection’ tool which seems m.i.a (https://forum.renoise.com/t/new-tool-run-cmd-on-selection/29282 ), like the CDP tool you can add sliders, set ranges for parameters that accept it.
Are there any plans of implementing similar functionality in the batch tool? Would be great, though seeing this is an old thread I’m necro’ing… probably not…
Last time I checked, the documentation of Sox doesn’t have a good overview for all the options and correct syntax for all the processes, right? + when supplying incorrect arguments/values, it doesn’t return any info on what’s wrong, opposed to the CDP programs. For a boring vacation, might look into hacking the CDP tool or Johann’s commandline thing if presets can be easily produced.