Doepfer

dieter says:
"We still discuss the internal structure of the
A-143-4, especially the type of control and
in/outputs. We will probably introduce a VC master
oscillator with a max. frequency of some kHz. The
master oscillator is used to scan the different
waveform tables (e.g. saw, triangle, sine ....) of the
LFOs. The length of each table will be probably 256
and the amplitude resolution too (i.e. 8 Bit for
both). Consequently the frequency of the master has to
be 256 times the final LFO frequency. The frequency
dividing factor for each sub-LFO defines if it runs
with 1/2, 1/3, 1/4, 1/5 .... frequency. The phase
shift CV or the reset defines the phase relations
between the different LFOs. Both CV and Reset
controlled phase shift between the LFOs have its
advantages and disadvantages. Maybe we will built an
electronics that uses the switch contact to detect if
a plug is inserted into the Reset socket and
deactivates in this case the CV control section. The
electronics has to detect the plug insertion
independent of the signal applied to the reset input
as the reset signal could occur accidentially and has
nothing to do with the insertion of the plug. Even the
number and type of waveform outputs is still under
discussion. We have to reduce the number of waveforms
for each LFO or offer the possibility to switch
between different waveforms e.g. with a three-position
toggle switch for three waveforms. Small rotary
switches are extremely expensive (e.g. as those used
in A-110/A-111 are more than 10 Euro each without
knob). Another solution would be the selection of the
waveform with up/down buttons. A lot of possibilities
and we have to find out which is (hopefully) the best
solution. I hope we will publish our first front panel
draft for the A-143-4 next week as discussion base.
But we also have to finish some other designs: the
MIDI version of the Ribbon Controller and the organ
keyboard. So our focus will be not only the A-100
during the next weeks."







=====
Bakis Siros
Parallel Worlds / Polariton
Athens-Greece
[Doepfer_a100] group owner
http://www.rubber.gr
http://www.shimarecords.co.uk
http://www.ward12.com

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