...and here's me thinking I'm the grumpy bugger.
You may or may not know that the DSP chip (Philips 7705) actually has a set of "Preset Presets" for Jazz, Nromal, Flat, Voice and a few others I can't bring to mind. They are directly programmable, and just set up various EQ settings. Access to this feature was not built into the player GUI because it was considered a bit weedy, and the primary sound control interface is the EQualiser.
However, what he was asking about
is already there, you just need a path to it.
One of the few remaining Mk1 owners...
#00015