When JRiver added per file DSP, it was a huge advance, and the customers were very grateful.
But there has always been an issue with the implementation that kept a lot of people from using it....
I propose a small and easy change:
Add an option "Use default DSP setting when DSP field is empty..." with entry to select either "Do Nothing" or to pick an existing DSP preset.
When the DSP tag is read at playback, this option can be honored accordingly. The Do Nothing setting would preserve current behavior. Selecting a preset would provide for a global default.
This is such a small change, and would help so many people, without causing any further ripple effect. Could this please be done? It's too easy!