Bob, these are Registered Parameter Numbers (RPN), a term I didn't know, but actually saw on the MIDI CC table on your web site. Check out these two links to see if this helps.

Basically, RPN's are generic settings (101 and 100) and NRPN's (non-registered - 99 and 98) are device specific settings. The 101/100 determine what you are trying accomplish:

The current MIDI standard only specifies five RPNs (numbers are shown in decimal with the MSB, CC101, first): they are Pitch Bend Sensitivity (0, 0), Fine Tuning (0, 1), Coarse Tuning (0, 2), Tuning Program Select (0, 3), and Tuning Bank Select (0, 4). Another number is in widespread use: Null (127, 127), which, very usefully, cancels the active parameter number. This dummy RPN is occasionally called Reset RPN, and it does not require a Data Entry message for parameter value.

The CC6 is to actually set the parameter value (for example, the amount of pitch bend sensitivity).

http://www.philrees.co.uk/nrpnq.htm

https://www.midi.org/forum/52-nrpn,-rpn-questions

Hope this helps.


John

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