Moog-music Slim Phatty User Manual download pdf (Page 52)

Page 54

Slim Phatty User’s Manual - The User Interface

Page 55

Slim Phatty User’s Manual - The User Interface

How the SP handles MIDI

When you adjust any one of the SP’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

SP sound parameters via MIDI.

The tables on the following pages list all MIDI CC messages and values for the Slim Phatty.

NOTES:

1. The SP sends and receives 7-bit MIDI CC messages for all parameters except

for the Modulation Wheel and Filter Cutoff, which receive high-resolution, 14-

bit MIDI CC messages. This allows for ner control and smoother changes for

these parameters. For these two parameters, the MSB indicates the ‘regular’ CC

number, and the LSB indicates the high-resolution ‘ne’ control value. If you are

only sending 7-bit MIDI CC messages to the SP, 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 ne clock rates. The coarse rate is set by CC#04 in increments of 3

BPM over a range of 21-320 BPM, and the ne rate is set by CC#36 in increments

of 0.1 BPM. To set the clock rate, rst 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 ne 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 ne 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 SP’s display will show ‘121.7 BPM’.

(Note that in order to display the internal BPM on the SP’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 38.

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