Contour Amount - Moog THE SOURCE Owner's Manual

4. Set IdAIJiHcH^ tn 99. Touch 1^:1 J;ftWM mm. Set IWtlfliUHUnwtlilMB and all Mixer
controls to zero. Play different keys. At maximum emphasis, the filter oscillates and produces a
controllable sine wave.
CONTOUR AMOUNT
The Source's filter is voltage controlled; a positive voltage at its control input raises the cutoff frequency. The
filter accepts voltages from many places on The Source, but the main voltage source is the filter contour generator.
The Contour Amount circuit controls the amount of voltage that goes to the filter from the contour generator.
(The contour generator is explained more fully in the Controllers section beginning on page 35.)
Touch program
MEMORY
jfj Ld LJ OH l£J
FOOTAGE WAVESHAPE
SYNC
| OFF I I ON '
2—1
M* 1 I 16 I
FOOTAGE
[7] (K) 0
I INTERVALI
OSCILLATOR BANK
VOLTAGE CONTROLLEO FILTER
HK6
TRACK
Iff CUTOFF I EMPHASIS
FILTER CONTOUR
LOUONESS CONTOUR
I P I I S I | ft
MODIFIERS
REcV".:- REC2:Vj"'"'STOP CONTINUE , J'^PtAY 1 PLAY 2 ■ REC - PLAY.- '" ARPEGGIO,. .' S&H S& H flLT:>AUTO TRIG EXT.TRIG :SAVE VERIFY LOAD . ^^^ ^^^
PROGRAMS
' . *'i CASSETTE
l.Set
CONTOUR AMOUNT
to zero. Hold down any key. There is no change in the brightness of the sound.
2. Now set Q^^QQSSEQQSlSlfl ^° &Q- Hold down any key. The voltage from the contour generator opens
and closes the filter (by raising and lowering the cutoff frequency). Experiment with different settings of the
Contour Amount control.
32