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Tony,<br>
<br>
I experimented a bit around this idea of yours and came up with some
remarks...<br>
<br>
You'll want a glide circuit on the output. Or even cross fading
VCA's. Especially when in sampling mode. <br>
I came up with this while testing. I actually used 8 oscillators as
input. Every step had it's own VCO. When the step was active, the
vco connected to this step was send to the output. Here cross
fading VCA's would be fun. Especially if you could alter the amount
(or time, or slope) of cross fading. Not exactly what you described,
but fun anyway. (the output level depends on the position of the
knob, this is also nice, but probably also part of your concept)
Actually this part is like the interpolating scanner from Jurgen
Haible.<br>
<br>
Later I connected all sorts of CV's (LFO's, EG's,...) to the inputs,
this is when you'll want a glide circuit. <br>
<br>
One issue occurred to me when testing this setup with a sample and
hold; if you're using the master trigger and a master CV input, all
the steps end up with the same value. So instead, I clocked the
sample and hold from the same clock as the sequential switch was
running. This was more fun, but not so interesting, I could have
just used the S&H to obtain the same result. So Luckily I have 3
S&H modules, and experimented some more. Having a S&H on
each step is probably what you described, and would be very cool. In
that case you'll want some routing of the output signal, so you can
actually create multiple "evolving" outputs. (the outputs could be
the sum of a couple of "selected" steps, or even some more complex
algorithms). I think this part should be done digitally, with a nice
(transparent/flexible) interface <br>
<br>
Next on my to do list is to find out how I can skip steps or change
the order the steps are activated. I'll need to hack the sequential
switch as i don't think I can do that with the modules I now have.<br>
<br>
Thanks anyway, as this was a nice excuse to spend some quality time
with Beelzebuffo!<br>
<br>
ToAd<br>
<br>
<div class="moz-cite-prefix">Tony Scharf schreef op 07/01/2014
21:47:<br>
</div>
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<div dir="ltr">I've had this idea for a sequencer module for a
while (how you could do this with MIDI, I just don't know).
Here goes..
<div><br>
</div>
<div>It's an 8 step sequencer. With 8 identical columns and a
control section. let me start with the channels</div>
<div><br>
</div>
<div>at the top, each channel has a CV knob 0 to 10v. Pretty
standard so far.</div>
<div><br>
</div>
<div>Under that is a switch with 3 positions (Knob, Sample ,
Track). </div>
<div><br>
</div>
<div>Under that there is a button to trigger the Sample and an
input jack that accepts a trigger or gate to initiate
sampling.</div>
<div><br>
</div>
<div>When that step of the sequence is active, here is what
happens in the different modes:</div>
<div>Knob - standard behavior. Whats on the knob is what is
output</div>
<div>Sample - the output of a Sample/Hold circuit that takes the
value of an external input. if you don't plug anything in, it
uses an internal noise source.</div>
<div>Track - the output passes whatever is at the input. If
nothing is at the input, the noise is output (why you want
that, I don't know). </div>
<div><br>
</div>
<div>here is where it gets tricky to explain.</div>
<div><br>
</div>
<div>the control section has a clock and reset input as you
would expect, but it also has a master sample trigger input
and master sample input. </div>
<div><br>
</div>
<div>The master sample input is normaled to all the channels
inputs and breaks the normal from the noise source if
something is plugged in there. The master sample trigger is
the same way. A clock pulse or trigger there will cause all 8
channels to take a new sample. </div>
<div><br>
</div>
<div>The idea is that you can have random patterns that repeate,
but you can change any channels value by either manually
triggering a new sample be taken or telling the whole thing to
take a new sample. </div>
<div><br>
</div>
<div>oh, each channel also needs a trigger out for when that
step is active. a trigger out from one channel could be used
to for another channel to resample or even to tell the entire
unit to resample. Lots of possibilities in patching. </div>
<div><br>
</div>
<div>Also in the control section, I would want to lift something
from Future Retro Ravolution. I'd like an offset knob that
changes the step output order. a value of 0 (center) makes the
sequence play normally. set it to 1 and the sequence skips
every other step. 2..skips two steps..etc. set it negative,
and the sequencer jumps backward the same number of steps.
set to odd numbers you can get evolving patterns to break up
the monotony. You can use a reset jack to always go back to
step one at any time.</div>
<div><br>
</div>
<div>I did a drawing on paper. I can put that into a digital
diagram or something if you like.</div>
<div><br>
</div>
<div>Seriously, I would like to see this made. I've built up
simple versions of it using individual modules but it's just
crazy enough to be the kind of thing I think the euro
community would love. </div>
<div><br>
</div>
<div>I think you could sell that for about $250 to $350 USD or
more. Sequencers are pretty hot items in the euro crowd. </div>
<div><br>
</div>
<div>Tony</div>
<div><br>
</div>
</div>
<br>
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