hello tom,

the a196 front panel layout is not very clear.
the output of the a196 lowpass part is
the unfiltered signal, while the ouput
of the phase comparator is the filtered one.
this is stated in the manual, but imho the
placement of the jacks is not optimal and
can lead to some confusion, because the layout
of the module and the printing on the panel
suggest that it is the other way around.

but i also have to say that i was not very clear in my
description. when i said that i'd replaced the lowpass
filter, than i meant that the lowpass control was set
to zero, while other modules do the processing.
the lowpass filter is indeed still in the patch.

best wishes

ingo



--- In Doepfer_a100@yahoogroups.com , "thomasborax" <thomasborax@y...>
wrote:

> hi-
> thank you for the patch posts. some very nice ideas about the PLL.
> i have a question about example 6 however. in this example you
> state that the patch employs a "fair amount of a196 low pass
> filtering." perhaps i'm not understanding the normalizing scheme

of

> the module. haven't you bypassed the filter entirely in this

patch

> in your example 4 you say that you're using the a171 instead of the
> a196 built-in lpf. in this example 4 patch you have phase comp out
> going through it's processing loop then into the a196vco input,
> which is also what happens in example 6...except that you state

that

> you're using the a196 on board filter this time.
> i guess my question is, to your knowledge, is the a196 normalized

so

> that the input/output jacks break the internal loop the one jack
> that obviously does not break the loop is the vco out, which must
> necessarily go to the phase comp as well as further down the signal
> chain.
>
> the reason i ask is because, although i've had some incredible
> results from using my PLL, i find that it takes a lot of
> experimenting to get interesting results (to me at least.) perhaps
> i could use insight into how the module is normalized. it's not
> clear to me from the pdf manual. pardon me if i'm being dense

about

> it.
> -tom
>
> --- In Doepfer_a100@yahoogroups.com , "selfoscillate"
> <synaptic_music@y...> wrote:
> >
> > hello,
> >
> > a few quite simple a196 patch examples:
> >
> > (sorry, this is a long post...)
> >
> > in the following examples the same 8-note sequence is
> > repeated over and over (coming from an a155 + a156).
> > each note also generates a trigger signal (a155).
> > this trigger starts an adsr with each note, which
> > opens the final vca (a131). beware, the sound is
> > a bit harsh sometimes ;-)
> >
> > also no live tweaking in these examples.
> >
> >
> > 1.
> > the first file is the pure square output of an a110,
> > which plays the sequence. this will be the source
> > for the a196 in all examples.
> >
> > http://www.selfoscillate.de/a100files/a196-a110source.mp3
> > filesize: 73 kb
> >
> > patch details:
> > pitch cv --> a110(a) cv1 input
> > a110(a) square --> a131 signal in (to recorder)
> >
> >
> > 2.
> > next you hear the a196 vco output, when the
> > a110 squarewave is fed into input 2 of the a196.
> >
> > http://www.selfoscillate.de/a100files/a196-neutral.mp3
> > filesize: 73 kb
> >
> > patch details:
> > pitch cv --> a110(a) cv1 input
> > a110(a) square --> a196 phase comp Input 2
> > a196 vco output --> a131 signal in (to recorder)
> >
> > a196 settings:
> > offs = 5 ; range = mid ; type = 3 ; lowpass = 0
> >
> >
> > now, what can we do to turn this upside down
> >
> >
> > 3.
> > this one uses another a110 at the a196 input 1,
> > which plays the same sequence 1 octave higher.
> > notice the variations, they are generated because
> > of a slight detune between both vco's.
> >
> > http://www.selfoscillate.de/a100files/a196-spank.mp3
> > filesize: 1084 kb
> >
> > patch details:
> > pitch cv --> a110(a) cv1 input
> > pitch cv --> a110(b) cv1 input
> > a110(a) square --> a196 phase comp Input 2
> > a110(b) square --> a196 phase comp Input 1
> > a196 vco output --> a131 signal in (to recorder)
> >
> > a196 settings:
> > offs = 5 ; range = mid ; type = 3 ; lowpass = 0
> >
> > a110(b) + 1 octave up
> >
> >
> > 4.
> > now the second a110 is removed from the a196 input 1.
> > the a196 vco output is now fed back into the cv-input
> > of the first a110. an a171, modulated by the pitch-cv,
> > replaces the built-in a196 lowpass filter. listen to
> > the rhythmic variations, these are all created by the
> > the patch, without any tweaking.
> >
> > http://www.selfoscillate.de/a100files/a196-slewfm.mp3
> > filesize: 1407 kb
> >
> > patch details:
> > pitch cv --> a110(a) cv1 input
> > pitch cv --> a171 cv1 input
> > a110(a) square --> a196 phase comp Input 2
> > a196 vco output --> a180 multiple
> > a180 multiple --> a131 signal in (to recorder)
> > a180 multiple --> a110(a) cv2 input
> > a196 phase comp output --> a171 signal input
> > a171 output --> a196 vco cv input
> >
> > a196 settings:
> > offs = 5 ; range = hi ; type = 2 ; lowpass = 0
> >
> > a110(a) settings:
> > cv2 input = 4
> >
> > a171 settings:
> > rate = 7 ; cv = 7
> >
> >
> > 5.
> > the a171 is replaced by a combination of a138c,
> > a149/1 and a147.
> >
> > http://www.selfoscillate.de/a100files/a196-rndfm.mp3
> > filesize: 438 kb
> >
> > patch details:
> > note trigger --> a149/1 qrv clock input
> > note trigger --> a110 hard sync input
> > pitch cv --> a110(a) cv1 input
> > a110(a) square --> a196 phase comp Input 2
> > a196 vco output --> a180 multiple
> > a180 multiple --> a131 signal in (to recorder)
> > a180 multiple --> a110(a) cv2 input
> > a196 phase comp output --> a138c input 1
> > a147 sine output --> a138c input 2
> > a149/1 qrv 2n output --> a138c input 3
> > a138c output --> a196 vco cv input
> >
> > a196 settings:
> > offs = 5 ; range = hi ; type = 1 ; lowpass = 0
> >
> > a110(a) settings:
> > cv2 input = 4
> >
> > a147 setting:
> > frequ = 5
> >
> > a149/1 settings:
> > man n = 6 (fully clockwise)
> >
> > a138c settings:
> > input1 = +5 ; input2 = +1 ; input3 = -3 ; out = +5
> >
> >
> > 6.
> > same as example 5, but without a149/1 and without
> > the a110 cv modulation through the a196 vco,
> > but with a fair portion of a196 lowpass filtering.
> >
> > http://www.selfoscillate.de/a100files/a196-resofake.mp3
> > filesize: 700 kb
> >
> > patch details:
> > note trigger --> a110 hard sync input
> > pitch cv --> a110(a) cv1 input
> > a110(a) square --> a196 phase comp Input 2
> > a196 vco output --> a131 signal in (to recorder)
> > a196 phase comp output --> a138c input 1
> > a147 sine output --> a138c input 2
> > a138c output --> a196 vco cv input
> >
> > a196 settings:
> > offs = 5 ; range = hi ; type = 1 ; lowpass = 5
> >
> > a147 setting:
> > frequ = 5
> >
> > a138c settings:
> > input1 = +5 ; input2 = +1 ; out = +5
> >
> >
> > 7.
> > this one uses an a108 bandpass between a196 vco output
> > and a196 phase comp input 1. the a108 is swept by an a147.
> >
> > http://www.selfoscillate.de/a100files/a196-bpsweep.mp3
> > filesize: 305 kb
> >
> > patch details:
> > note trigger --> a110 hard sync input
> > pitch cv --> a110(a) cv1 input
> > a110(a) square --> a196 phase comp Input 2
> > a196 vco output --> a180 multiple
> > a180 multiple --> a108 signal input
> > a180 multiple --> a131 signal in (to recorder)
> > a147 sine output --> a108 cv input 3
> > a108 bandpass output --> a196 phase comp input 1
> >
> > a196 settings:
> > offs = 10 ; range = mid ; type = 2 ; lowpass = 7
> >
> > a147 setting:
> > frequ = 5
> >
> > a108 settings:
> > frequ = 6 ; cv3 input = 4,5 ; audio level = 2 ; emphasis = 0
> >
> >
> > as said, these patches are quite simple, but even those
> > are very effective. in a more complex patch even wilder
> > things can be done :-)
> >
> >
> > best wishes
> >
> > ingo