[sdiy] simple sequencer?

[Scott Stites]

Yep, I've got it on breadboard with trimpots for setting the steps =-).
Works OK enough if you don't have anything else!

Here's a sample that covers a lot of ground:

1.  My very first recording using the Korg D8 hard disk recorder.

2.  It uses the S&H circuit from the 266 SOU (in a very nontypical,
un-Buchla sounding app) to sample the output of the sequencer which is
running an 8 note sequence.  The circuit excels at Subotnick like mayhem,
too, BTW.  Amazingly low droop (I was surprised).

3.  It uses a PT2399 delay to enhance the rhythm.  In fact, the PT2399 is
the only delay heard in the sample.

4.  Two Rene Schmitz VCO3's are used, one controlled through the linear
input by one of the alternating outputs of the SOU S&H.  One VCO is
controlled exponentially by the 'combined' SOU S&H output.

5.  A Blacet DSC2000 (SN76477N anybody?) is controlled by the other
alternating output of the S&H.  The noise filter is modulated by an LFO.

6.  The EG (an RW A/D EG, not unlike on the MiniSynth) is triggered by the
output of a VC trigger generator which is part of a controller that I'm beta
testing for Thomas Henry's forthcoming book.  It's also triggering the S&H.

7.  The filter is Rene Schmitz's discrete transistor based 2040 filter.  No
VCA is used, BTW.

Some additional VCO3/TH circuit stuff is put in, mainly because it's
possible (love that D8 already).  It was meant as a rhythm track for
something else, but it's interesting nonetheless (to me anyway) if you've
got the patience/time to download a 4.2 MB file.  The Baby Sequencer is the
core of the sample.

It's on my "Birth of a Synth" page, at the top under '25 July 2004'.

http://mypeoplepc.com/members/scottnoanh/slsdiy/id18.html

It can be downloaded directly with this link (if it doesn't wrap horribly):

http://mypeoplepc.com/members/scottnoanh/sitebuildercontent/sitebuilderfiles
/d8_1a.mp3


BTW, there's a huge one (7.4 MB) on my 'Patches' page.  It also uses the
Baby Seq (the same sequence, though unrecognizable as the same, in a totally
different vein).  Interesting thing about it is that it uses that Thomas
Henry -24 dB filter that I mentioned a while back, as well as the controller
doo-hickey.  This one was recorded on my computer.

Clear at the bottom of the Patches page, linked as "Sample X  (7.4 MB)".

http://mypeoplepc.com/members/scottnoanh/slsdiy/id15.html

Direct link:

http://mypeoplepc.com/members/scottnoanh/sitebuildercontent/sitebuilderfiles
/newmix_a.mp3

Cheers,
Scott




----- Original Message -----
From: "R. Drake" <rdrake at data2action.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, July 25, 2004 5:54 PM
Subject: Re: [sdiy] simple sequencer?


> I know this topic came up a while ago, but I just stumbled on this:
>
> http://www.midiwall.com/gear/babyseq/
>
> Doesn't get much more basic.  I'm doing something very similar on my next
> Ray Wilson MiniSynth.
>
> lbd
>
> On Wed, Jun 23, 2004 at 04:36:19AM -0700, Charles Brodeur wrote:
> > Hello All,
> >  Since I don't think I will be able to build a MIDI-to-CV module for
> > the synth I am working on (no access to microprocessor tools), I would
> > like to build a simple sequencer.
> >
> >
> > I am looking for a simple 8-step design, CV output only. I have seen a
> > few designs based on a handful of chips, I thought I would ask here to
> > get the best results. The important factor in the design is that I
> > would it must be simple. Also, I cannot produce PCBs, so the circuit
> > would be built on perfboard.
> >
> > If anyone here can recommend a design, I would appreciate it greatly.
>