ARP ODYSSEY UPGRADES & RESTORATION

   
 
       
   
       
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NEWS AND UPDATES - 04/05/2022

SECOND FILTER FOR THE ODYSSEY 2 - We can now install a second ARP filter and support circuitry inside your Odyssey that you can engage with a front panel toggle switch.

4035CX FILTER - CMS has come up with a much better sounding Moog ladder filter (compared to the original and competitors) for the ARP Odyssey 2!

See below for more details.

 
   

 

STANDARD UPGRADES FOR THE ARP ODYSSEY

YOU MUST SEND YOUR ODYSSEY TO CMS FOR THESE UPGRADES, SEE BELOW FOR KITS AND PARTS

(no machining of the front panel)

FILTER UPGRADE - (4075) - FOR MODELS 2811 thru 2823 - $89.00

Odyssey 2 filters have a upper frequency limit of 11khz! This frequency response upgrade is similar to the 2600 filter upgrade extending the cutoff frequency range from 11khz to 28khz. This upgrade also replaces some critical components in the signal path. Your filter sub-module is removed, tested, upgraded, re-tested and re-installed into main board "C".

 

POWER SUPPLY REBUILD - ALL MODELS - $79.00

Certain critical components in your power supply have a shelf / working life of 20 years maximum. It's probably time your power supply was rebuilt. These units are getting very old, so if you are serious about your ARP, you should get the Power Supply Rebuild.

 

AUDIO PATH UPGRADE V2.0 - ALL MODELS - 2800 thru 2823 - $125.00

This mod replaces critical signal path components in the synthesizer section of your Odyssey with audiophile grade components. Low end response is improved resulting in a more accurate wave shape. High end response is also Improved.

 

 

 
     
 

MAJOR UPGRADES FOR THE ARP ODYSSEY

 

LFO FREE RUN SWITCH - ALL MODELS - $59.00

It's impossible to get a slow moving sweep on the LFO while playing your Odyssey's keyboard. The LFO also re-triggers on incoming external gate signals from a remote keyboard. When this switch is in the "free run" position, the keyboard and the external gate input will not restart the LFO as with stock units.

 

EG TIME EXPANDER SWITCH - ALL MODELS - $69.00

This mod installs a professional grade miniature toggle switch (the exact model used in the 2500 modules) in your Odysseys AR or ADSR section that speeds up the time constant on the envelope generator to attain 2600 type percussive envelopes. This upgrade now features a 3 position switch with an extra slow mode for extended attack, decay and release times. Now available for the AR generator.

 

NEW! - 2829 SECONDARY FILTER ADAPTER - FOR THE ODYSSEY 2 ONLY - $225.00

We can install a second ARP filter and support circuitry inside your Odyssey that you can engage with a front panel toggle switch. This is only available for the Odyssey 2 - specifically models 2810 thru 2823. You will have a choice between the second version - 4035 filter and the third version - 4075 filter. NOTE - This does not include the price of the additional sub module. See parts section below for sub-module details. Not available in kit form.

 

HIGHPASS FILTER BYPASS SWITCH - ALL MODELS - $49.00

Oscilloscope analysis of a square wave with the filter open of any Odyssey reveals a ultra low end roll off. The Odyssey 1 is a bit worse than later models but they all have this issue. The main culprit is the simplistic, passive high pass filter. Even when the high-pass filter slider is all the way down, it's still removing the ultra low end from the signal path. This switch cuts out the high pass filter from the signal path. You will need a monitor system that reproduces very low frequencies to hear the difference.

 

VCF FM3 INVERTER SWITCH - ALL MODELS - $69.00

This mod installs a professional grade miniature toggle switch and circuitry that inverts the frequency modulation input #3 of the VCF. This will give you the ability to sweep the filter downward using negative ADSR envelopes similar to the ARP 2500. The inverter also can invert the AR generator signal going to the filter as well.

 

PORTAMENTO SWITCH AND PUSHBUTTON - ALL MODELS - $89.00

This mod installs a professional grade miniature toggle switch that turns on and off the portamento circuit. When the toggle is in the "off" mode, the pushbutton switch provides a momentary portamento function, facilitating more expressive playing techniques. This upgrade is similar to the portamento setup on the 3620 keyboard for the ARP 2600.

 

REAR PANEL INTERFACE JACKS - FOR THE 2800 ONLY - $169.00

Professionally installed CV, gate and trigger inputs and outputs for the 2800 Odyssey using 1/8th inch Switchcraft jacks. The interface is functional with only CV and gate inputs if desired. This new and improved CMS upgrade features high speed operation of the gate and trigger input signals eliminating the latency problem inherent in the old ARP retrofit for the 2800. If you have the factory interface installed already, we can update it to our high speed version for $89.00

 
     
   
         
   
KITS, PARTS AND ACCESORIES
   
         
 
 

 

4035CX FILTER - 24 Db LADDER FILTER FOR MODELS 2810 TO 2823 - $275.00

CMS has come up with a great sounding filter for the ARP Odyssey 2! The 4035 filter was the second version filter used in the ARP Odyssey for a short time. It is ARPs version of the Moog ladder filter for the Odyssey. Years ago, we made an exact replica of the original but we found it to be too noisy so it was quickly discontinued. After years of development and listening tests, we have come up with a much improved version of the 4035. It exhibits significantly lower noise and better low end response compared to the original without any changes to the original circuit design. It also has a spectacular sound quality. Guaranteed to be temperature stable and free of control voltage feed-through. Now you can have ARPs version of the Moog ladder filter installed in your Odyssey 2 without giving up your original filter! Or vice versa. Compatible with the 2829 secondary filter adapter shown above.

 

UPGRADED 4075 FILTER - FOR MODELS 2810 TO 2823 - $225.00

The ARP 4075 was the third generation 24Db filter used in the ARP Odyssey. It was designed in 1976 by Alan Pearlman and Tim Gillette. This module is a genuine OEM unit. Upgraded to 28Khz and re-tested to factory specs. Guaranteed to be temperature stable and free of control voltage feed-through. Compatible with the 2829 secondary filter adapter.

   
 
         
   
 
     
 

ADDITIONAL INFORMATION:

ODYSSEY PACKING TIPS - click here

Odyssey slider color code

Please e-mail: discrete@discretesynthesizers.com to request more info. Estimates for repairs and restorations are free and will be e-mailed to you for your approval before any work begins on your machine.

 
     
   
 
         
       
 
                       
   
e-mail: filter@discretesynthesizers.com
phone: 912-727-2195 ©2004-2022 Phil Cirocco