The VSR-880 unit transmits Level Meter info as Polyphonic Key Pressure 
Messages. In the VSR-880, MIDI channel is hardcoded to 16. 

-------------------------------------------
 Status     Second     Third
 ______     ______     _____
 
 AFH        mmH        llH     ; I am assuming that the Status
                               ; message can be AnH with
                               ; n = MIDI Channel, as listed in
                               ; other sources for Roland Polyphonic
                               ; messages
 
 mm = Note #:               00H - 27H (0-39)
 ll = Level Meter Value:    00H - 10H (0-16)
 
 -------------------------------------------
 
 
 Level Meter and Note #'s
 ------------------------
 Level Meter Ch.   Note #
 ------------------------
 Track 1            0
 Track 2            1
 Track 3            2
 Track 4            3
 Track 5            4
 Track 6            5
 Track 7            6
 Track 8            7
 
 Input 1            16
 Input 2            17
 Input 3            18
 Input 4            19
 Input 5            20
 Input 6            21
 Input 7            22
 Input 8            23
 
 Aux Bus Lch        34
 Aux Bus Rch        35
 
 Master Lch         38
 Master Rch         39
 
 ---------------------------
 Level Meter Value and Level
 ---------------------------
 
 Val     Level       Val     Level
 ---------------------------------
 
 0    -InfinitydB      9    -12.0dB
 1    -48.0dB         10    -10.0dB
 2    -36.0dB         11    -8.00dB
 3    -32.0dB         12    -6.00dB
 4    -28.0dB         13    -4.00dB
 5    -24.0dB         14    -3.00dB
 6    -21.0dB         15    -2.00dB
 7    -18.0dB         16    -1.00dB
 8    -15.0dB