Wouldn't the [DSP] field display only work if you are using DSP per file, and have a value in the DSP tag for the file you are looking at? None of my media files have anything in that tag, because I'm not using DSP per file.
I thought DSP per file was an MC21 feature?
Also, it seems DSP per file is tied to DSP Presets, and the ability to load DSP Presets per file goes all the way back to;
20.0.6 (8/11/2014)
14. NEW: DSP presets can be loaded per file by setting the DSP field (the list is from Load/Save on DSP Studio).
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21.0.15 (10/14/2015)
1. Fixed: DSP presets set for video files didn't load properly.
20.0.65 (2/3/2015)
12. Fixed: MC could crash when loading
DSP presets on track change while the DSP Studio window was open.
20.0.34 (11/11/2014)
8. Fixed: The settings of some DSP plugins (eg. Effects) did not load properly when a
DSP preset was automatically loaded during playback.
20.0.21 (10/6/2014)
6. Fixed: The Effects DSP did not properly load its settings when loading
DSP Presets.
20.0.15 (9/12/2014)
4. Fixed:
DSP presets wouldn't load equalizer settings reliably.
20.0.14 (9/9/2014)
8. Fixed: Having a
DSP set for a file would cause it to fail to convert.
20.0.11 (8/27/2014)
4. Fixed: Loading equalizer settings from a
DSP preset wouldn't work reliably.
20.0.7 (8/13/2014)
14. Fixed: Output Format wasn't loading / saving with
DSP Presets.
20.0.6 (8/11/2014)
14. NEW:
DSP presets can be loaded per file by setting the DSP field (the list is from
Load/Save on DSP Studio).
20.0.5 (8/4/2014)
7. NEW: Added a
Load/Save button to DSP Studio.