DOEPFER A-107 Manuel - Page 13

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6. User examples

In the following we use the abbreviations LP

(lowpass), BP (bandpass), HP (highpass), AP

(allpass), NF (notch filter).

Before you continue with more complex appli-

cations of the A-107 we recommend to ac-

quaint with the 38 filter types described in

chapter 7. Take the time to hear all the filters

and how they respond to filter frequency, reso-

nance and distortion. Find out how morphing

between 2 filters is influenced by the morphing

time. Differences in loudness can be compen-

sated with the amplitude control.

The easiest application is to use only one single filter

from the pool of 38 filters. This makes quite sense as

there are a lot of filters available that cannot be reali-

zed with other A-100 modules (e.g. the "fast food filter"

no. 09, look at response curve to understand the name

"fast food"). But the point of the A-107 are of course

the filter chains and the morphing features. In the

following we describe some suggestions:

System A - 100

Clocked mode

The advance to the next filter in the chain can be

triggered by different events. Here some examples:

• Advance triggered by a keyboard by using the gate

signal as step clock

• Advance triggered by manually operated control

devices like foot switches (A-177), Theremin

(gate output of the A-178), light controller (gate

output of the A-179), ribbon controller (gate out-

put of the A-198)

• Random advance with the Random Clock Genera-

tor A-117 or A-149-2 (or via CV with the A-118

random CV output or one of the outputs of A-149-1)

• Periodical advance with the rectangle output of a

LFO, any clock signal or in sync with MIDI clock

(clock out of the A-190 divided by the clock divider

A-160 to obtain a smaller clock frequency)

• Rhythmical advance by means of clock divider

and sequencer A-160/161, combined e.g. with the

logic module A-166 and using the step reset input

of the A-107,

• more complex rhythmical filter sequences by

controlling the step clock by the trigger output of a

analog sequenzer (A-155 or MAQ16/3) or a trig-

ger sequenzer (Schaltwerk)

Multitype Morphing Filter

A-107