Moog Music Little Phatty Stage II - Manual (Page 52)

Page 54
LP Stage II User’s Manual - The User Interface
Page 55
LP Stage II User’s Manual - The User Interface
How the LP handles MIDI
When you adjust any one of the LP’s four analog edit controls, MIDI Continuous Controller (CC) mes-
sages are generated and transmitted on the MIDI Out connector. The information contained in these
MIDI messages varies according to the parameter assignment for that analog edit control. For example,
when the front panel LFO RATE switch is selected, the analog edit control in the Modulation Section
generates MIDI CC data corresponding to the LFO Rate parameter (CC#03). MIDI CC messages are
also generated when you adjust Preset parameter values in the menus; this gives you total control of all
LP sound parameters via MIDI.
The tables on the following pages list all MIDI CC messages and values for the Little Phatty.
NOTES:
1. The LP sends and receives 7-bit MIDI CC messages for all parameters except
for the Modulation Wheel and Filter Cutoff, which send and receive high-resolution,
14-bit MIDI CC messages. This allows for finer control and smoother changes
for these parameters, whether your are using the LP as a MIDI controller, or
controlling the LP via MIDI from a sequencer or DAW. For these two parameters,
the MSB indicates the ‘regular’ CC number, and the LSB indicates the high-
resolution ‘fine’ control value. If you are only sending 7-bit MIDI CC messages to
the LP, use the MSB channel number by itself for these two parameters.
2. The Arpeggiator Clock Rate is set by two MIDI CC messages that correspond
to coarse and fine clock rates. The coarse rate is set by CC#04 in increments of 3
BPM over a range of 21-320 BPM, and the fine rate is set by CC#36 in increments
of 0.1 BPM. To set the clock rate, first set the coarse rate by dividing the target
BPM by three; the integer result (the whole number) will be the CC#04 value. Then
set the fine clock rate by subtracting the coarse BPM value from the target value
and multiplying the result by 10. This will be the CC#36 value.
For example, to set the Arpeggiator Clock Rate to 121.7 BPM:
Determine the MIDI CC coarse value by dividing the target BPM by 3:
121.7/3 = 40.566
The CC#04 value is ‘40’ (=120 BPM)
Determine the MIDI CC fine value by subtracting the coarse BPM value
from the target value:
121.7 - 120 = 1.7
Then multiply the result by 10:
1.7 * 10 = 17
The CC#36 value is ‘17’
For CC#04 = 40 and CC#36 = 17, the LP’s display will show ‘121.7 BPM’.
(Note that in order to display the internal BPM on the LP’s LCD, the
Arpeggiator must be ON and the Arpeggiator Clock must be set to ‘INT’.)
3. The MIDI CC assignments shown for each section are over-ridden when Pot
Mapping is enabled in that section. For more on programming and enabling
Pot Mapping, see page 37.