just some thoughts concerning ASR's
although the ken stone design is a clone of the
function of the serge unit, there are some significant
differences that are of note. one aspect of sample
and hold devices is that they droop over time, that
is, the hold is not infinite. the modern serge ASR
has very good droop characteristics. the ken stone
unit is actually designed to amplify the droop. this
is an attempt to compensate for the limitations of the
cheap multiplexer chips that he is using. with this
design you have the choice of limited voltage range,
or amplified droop. the modern serge design does not
have these limitations. admittedly these limitations
do not affect simple patches where a 5 volt lfo or
similar is sampled, but when mixing various voltage
sources, or playing a wide range of pitches from a
keyboard, this can come into play. depending on your
use of these modules, the similarities and differences
in performance may be more or less evident. also if
you replace a real serge ASR with the ken stone one,
you will loose the "pulse out" which allows you to
chain multiple units together for longer shift
registers.
--- Fernando de Izuzquiza <fdi@...> wrote:
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although the ken stone design is a clone of the
function of the serge unit, there are some significant
differences that are of note. one aspect of sample
and hold devices is that they droop over time, that
is, the hold is not infinite. the modern serge ASR
has very good droop characteristics. the ken stone
unit is actually designed to amplify the droop. this
is an attempt to compensate for the limitations of the
cheap multiplexer chips that he is using. with this
design you have the choice of limited voltage range,
or amplified droop. the modern serge design does not
have these limitations. admittedly these limitations
do not affect simple patches where a 5 volt lfo or
similar is sampled, but when mixing various voltage
sources, or playing a wide range of pitches from a
keyboard, this can come into play. depending on your
use of these modules, the similarities and differences
in performance may be more or less evident. also if
you replace a real serge ASR with the ken stone one,
you will loose the "pulse out" which allows you to
chain multiple units together for longer shift
registers.
--- Fernando de Izuzquiza <fdi@...> wrote:
> Hi Bakis, it would be extremely difficult to find____________________________________________________________________________________
> Serge schematics.
> Since it is functionally identical (and seem to have
> better performance) this would be a
> very good option:
> http://www.cgs.synth.net/modules/cgs34_asr.html
> The board is 6'' long, as original Serge's
>
> Fernando
>
>
> --- In SergeModular@yahoogroups.com, Bakis Sirros
> <synth_freak_2000@...> wrote:
> >
> > hello,
> > i'd like to find the schematics for a Serge dual
> > analog shift register (early 80's module). i need
> > these to give them to my tech to repair the second
> > unit of a dual ASR module i have. in this module,
> only
> > the first unit works and also the aux pulse out of
> the
> > first unit seems not to work.
> > any help please?
> > thank you very much in advance,
> > best regards, :-)
> > Bakis.
>
>
We won't tell. Get more on shows you hate to love
(and love to hate): Yahoo! TV's Guilty Pleasures list.
http://tv.yahoo.com/collections/265