This is a first experimental patch on the ARP 2500.
I'm still getting used to using the matrix rather than traditional cables. It takes a bit of
getting used to & is definitely less messy and easier to record patches.
I'll upload pics of the patches as I work through my experiments so if you wish to duplicate them on your own modular go right ahead.
If you are an owner of a 2500 please write.
I'd love to swap & share ideas, patches, etc.
Left side. Modules used are 1004 & 1023 oscillators, 1047 (filter resonator), 1006 Filter/Amp, 1046 Quad EG (envelope generator),
On the right we have a 10 stage sequencer (1027 - The Clocked Sequential Control Module) & a mix sequencer (1050).
The 1050 mix sequencer is especially interesting. I have never come across anything like it.
It's a rather unusual 8 channel or two 4 channel mixer. More about this later.
I'd like to thank Mini & all the staff from ToneTweakers in NYC who lovingly restored this grand lady. Great job guys http://www.tonetweakers.com
INVENTORY # 19220 BRAND - FAIRLIGHT MODEL - CMI Series III FUNCTION - Computer Musical Instrument DESCRIPTION - This listing is for a FAIRLIGHT CMI Series III Synth/ Sampler System. We are selling this system on behalf of our client, Stewart Copeland.
This was a very personal Fairlight system of his as seen by the very
cool artwork and coloring done on the pieces. Note that the road case
for the mainframe says "The Police" stenciled on the side. This
represents a very rare opportunity to own a complete Fairlight system,
not to mention one that was part of the personal arsenal of a music
ACCU & DCCU System CPU & Interface (Loaded with cards & in road case with "The Police" stenciled)
VDU Series III Monitor (in road case)
MKB & ADK Series III Music Keyboard & Alpha-Numeric Keyboard with Data Pen (in road case)
Multi-Disk-Drive Rack Unit w/ SCSI CD-ROM Drive
2x Q256 - 256k RAM Cards (in addition to one already installed)
Manuals and System Disk (in original box)
3x Expression Pedals (for use with MKB Music Keyboard)
Large lot of various cables and snakes used for system wiring and interconnection
LINK - More information available from VintageSynth, SoundOnSound, and Wikipedia. ACCESSORIES - Includes ONLY what is shown in the photos and listed above. NO additional accessories. PHYSICAL CONDITION - Very Good WORKING CONDITION - This system was recently pulled
from storage and has not been fully tested by us as Fairlights remain an
item that requires some dedicated expertise to get up and running.
Admittedly we do not have the expertise on staff at the moment. It may
or may not need some restoration to bring to optimal condition for use.
With that it is being sold under the assumption that it may need
servicing, updating etc. TOTAL PRE-SHIP WEIGHT - 656 lbs TOTAL PRE-SHIP DIMS- 70" x 35" x 32"
I picked up a beautiful old Roland M-240 24 channel line mixer the other day.
Sadly the mixer didn't
have a power supply so it's kinda useless. Roland don't appear to know where I can find a PSU and eBay was equally unhelpful.
The 3 pronged input reads DC -/+ 21.5V and 500mA. It's not your standard Wall Wart.
Rather than throw it away I've decided to attempt building a new power supply.
Some pics of the circuit board:
This is the underside of the power PCB of the mixer. It contains 4 voltage regulators: AN7812F / AN7815F / AN7912F / AN7915F. They provide voltages of +/- 12V & +/-15V.
These regulators should be able to handle voltages ranging between 35V to 18V. ..... though I'm not totally sure about how it will effect the rest of the mixer...... So do be careful if you are making these sorts of mods.
Anyway, I decided to test the mixer with a variable DC power supply.
At +/- 18V the mixer works with the exception of the UV meter which doesn't light up.
Nice! +/- 21.5 V and the meter is now also working.:-)
Varying the 78XX and 79XX regulators on the CGS14 board will hopefully give me the required voltage A 7822 & 7922 regulator would be really nice but these are nearly impossible to find. Maybe the LM317 & LM337 could be used instead.???
The LM317 has three pins: Input, output, and adjustment. The device behaves like an op amp
Vout = Vref (1 + RL/RH)
Vout = 1,25v (1 + RL/RH) .... there might be a small error due to some slight current flows from the
It will be fun to play around with and experiment with different resistor values. Also these regulators
look like they could be very useful in future projects where unusual voltages are called for.
Finally, a good tech friend of mine has also suggested I build just the rectifier section of the CGS14 board, leaving out the regulators. (The Roland mixer already has the required regulators on board).
I'll update this page as I go along.:-)
These ideas are so far untested so proceed with caution if you are doing a similar thing. I take no responsibility if you connect a power supply to the mixer and it burns out!
A friend of mine was asking about op-amps the other day.
They are used extensively in the synth world.
I found this great little video and thought I'd share.
It's very basic but a great introduction to this very important
building block of electronic music. https://www.youtube.com/watch?v=K03Rom3Cs28
Around 7.15 into the video is a integrator circuit.
It's a classic way to convert a square wave to a triangle wave.
This is part of an electronic analog computer which Andrew rescued many years ago. It's programmed using patchcords that connect op-amps, capacitors, resistors, etc. to carry out calculations.
A adder circuit. It's a lovely illustration of how the Op amp's
negative feedback can be used to do computations.
This circuit adds the 3 inputs.
Vout = -R4[V1/R1+V2/R2+V3/R3]
This op-amp circuit performs the mathematical operation of Integration.
The output voltage is proportional to the integral of the input voltage. (ie: the size of the output is controlled by the
length of time a voltage is present at its input). This is determined by the negative feedback capacitor which charges/discharges.
I'm not sure of the age of this computer. Maybe 1950s / 1960's ????
It's beautiful though.
Pieter Brugel-the-elder, "The Triumph of Death"
c. 1562. The original can be found in the Museo del Prado, Madrid
Skeletons hauling a wagon full of skulls.
Death is indiscriminate. We will all have to face it one day.
An early valve synth
All pics are reproduced with the kind permission of NLCs.