DOEPFER A-107 Handmatig - Pagina 15

Blader online of download pdf Handmatig voor {categorie_naam} DOEPFER A-107. DOEPFER A-107 18 pagina's. System a - 100, multitype morphing filter

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D Try different waveforms for the LFO that controls

the step CV and increase the effect of the step CV

by turning up the attenuator. This increases the

range of filters that were covered by the LFO CV.

D Adjust LFO frequency and attenuation, manual step

and morphing time to obtain a complete pass

through the complete chain.

D By different settings of the manual step control and

the step CV attenuator one reaches any position

within the chain (e.g. step 16) and varies the range

of filters around this position (e.g. 14...16...18

10...16...22)

D Any control voltage sources of the A-100 can be

used to control the 5 parameters of the A-107.

There are no limits to the user's imagination.

D One may control step CV, morphing time, filter

frequency, resonance and amplitude from the CV

outputs of a sequencer (e.g. A-155 or MAQ16/3),

add a little bit envelop (e.g. from the VC-Decay

A-142) to control the filter frequency, control even

the decay from a sequencer track and you will

discover "filter sequences" you never heard before.

D The voltage controlled polarizer A-133 is a suitable

tool to adjust envelopes dependent on the current

filter type. A LP with a low basic frequency requires

another envelope (normally positive) than a HP

(e.g. a negative envelope). The A-133 is very useful

to change the envelope polarity and level indivi-

dually for each filter within a sequence.

System A - 100

7. Filter types

The 36 filter types of the A-107 are shown on the next

pages. For each filter the frequency response curve

(X/frequency versus Y/amplitude) is shown and a short

comment is added. For some filters customary names

are available, e.g. xxdB lowpass/highpass, bandpass,

notch or allpass. For the new filters without customary

names we tried to find an explanation that describes

the filter as good as possible.

The filters are divided into two groups. The filters of

the first group (01...18) allow self-oscillation. The

filters of the second group (19...36) do not include this

feature.

Multitype Morphing Filter

A-107