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DOWNGRADE
v2.3 analog sample rate reducer
this is just a bare bones scheme
with no values given to show you that the scheme
is indeed
mine. this is one of the first circuits i've
ever designed. the s/h chip is the LF398 and
the power chip is a MAX1044. runs on one 9v.
this could easily be altered to run at +12/-12
or +15/-15 direct
link to device - DOWNGRADEv2 the production
rights for this design are currently for
sale
please feel free to contact me
if you have any questions or visit the forum here
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SIMPLE
RESONANT LOW PASS FILTER
please feel free to contact me
if you have any questions or visit the forum here
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VOLTAGE
to RESISTANCE
here is a method
for driving vactrols. this is the basic idea
used for the parasite pot replacements. the
notes at the bottom of the image should cover
most of your questions
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the
Amber Press
this is a heavily
modified orange
squeezer redesigned to run at line level
and now includes attack, release, threshold,
ratio, input volume, output volume and bias
controls. the power can also now be run from
any DC source up to a single +44vdc or +/-22v
bipolar depending on the IC you use ( check
the datasheet) the IC can be substituted with
any of the usual options TL072, 4558, etc...
and they should all a slightly different sound.
the attack does not have a huge range but other
then that it came out quite nice. the original
OS was a very dark preset feedback compressor
that was designed for sustain and a tiny bit
of attack control for guitar. with the new
version i cleaned it up tremendously and made
it a lot more transparent and reactive, though
it still has a lot of character. if you would
like to darken in back up all you have to do
is increase the size of C1 to taste, maybe
add a few caps on switches so you can have
more options, 100n and 1u are good starting
points - bleak version on the way.
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Blast
Fed Disaster
here is an elaboration
on Forrest
M. Mims III's stepped tone generator, which
is also called the Atari Punk Console. my version
has far more potential for sound creation,
from quantized synth notes to harsh variable
digital static. a total of 7 knobs, a hand
full of switches and two voltage control inputs.
quick samples from
the breadboard ::: sample ::: sample ::: sample :::
Blast Fed Disaster
- speaker
this is the speaker driven output version
for those that want to build a standalone version.
notice the 10u output cap C3 is flipped and
that the + side of the speaker is attached
to the positive voltage supply - untested
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TLLYWCKR
i'm sure this has
been done a lot in the past but i've never
seen it myself. this is an incredibly simple
manual control voltage source that you can
use with any control voltage input. especially
handy for testing purposes. also gave it the
stupidest name i could think of, enjoy.
i should point out
that anyone that wants to use a normal passive
expression pedal to generate CV can use this
layout and just build a little box with the
pot in the diagram replaced by the tip ring
and sleeve of the exp pedal. as simple as can
be
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analog
resonant low pass filter
everyone keeps asking me for this so here
it is, but i'm not going to give you the values
of the components so DON'T ASK. i had to find
them myself, so do you, that is the fun part!!!
this was one of thee most rewarding projects
i ever worked on, once you really figure out
how a sullen key low pass works it will open
you up to so much more. stop bitching….
teach a man to fish and all that………
power is set up for bipolar, first cap is
just for AC coupling and can be around 100n doesn’t
really matter too much, first pull down res
is the impedance and should be around 100k
in most cases, any op amp should work fine,
different values for the rest will give you
different ranges and flavors, experimentation
is king
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MIMEO
yes this is the
basis of the MIMEO.
i'm posting this because i want designers to
have access to it. i don’t feel right
keeping it all to myself. if you do use it
or work with it at all i'd like to hear about
it. the values can be anything.
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the
mingrod
perfboard layout
for the mingrod -
a passive analog ring modulator / octave up - ask
questions here - this is set up to use
pcb mount stereo switching jacks to allow for
the octave up feature
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AC
to DC bipolar
board layout for
a bipolar 12V DC output from a 15V AC power
supply. this can be altered to supply 9V as
well by replacing the regulators with a 7809
and a 7909. many other voltages are possible
too. based on a design found here
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