ARP 2500 VCOs

 The Arp 2500 has 3 "types" of VCOs

1004‑T: Single Oscillator Module
1004-R: Single Oscillator Module
1004-P: Single Oscillator Module

The 1004-P

P stands for Potentiometer.

This is a Voltage Controlled Oscillator with a range

 from 0.03Hz to 16kHz.

This module can function as a VCO or an LFO. 

It features separate outputs for each of its five waveforms 

(sine, triangle, square, sawtooth, and pulse)  and a final

mixed output.

There are 6 CV (control voltage) inputs (3 at the top and 2 at the bottom of the module)

 

Input #4 is a CV input for Pulse Width Modulation.

 

The pots allow for gradual shaping of the waveforms.

You can easily mix different volumes of each waveform with one another to sculpt your sounds

The 1004- T

T stands for Toggle

This is a Voltage Controlled Oscillator with a range

 from 0.03Hz to 16kHz.

This module can function as a VCO or an LFO. 

Its core is identical to the above 1004-P.

 

It features separate outputs for each of its five waveforms 

(sine, triangle, square, sawtooth, and pulse)  and a final

mixed output.

There are 6 CV (control voltage) inputs (3 at the top and 2 at the bottom of the module)

 

Input #4 is a CV input for Pulse Width Modulation.

 

The toggle allow for quick shaping of the waveforms.

You can easily add and remove different waveforms from the final mix to sculpt your sounds.

 

The toggle version also allows you to add/remove inverted waveforms

1004-R

R stands for Rocker.

This is a Voltage Controlled Oscillator with a range

 from 0.03Hz to 16kHz.

This module can function as a VCO or an LFO. 

Its core is identical to the above 1004-P & 1004-T

 

It features separate outputs for each of its five waveforms 

(sine, triangle, square, sawtooth, and pulse)  and a final

mixed output.

There are 6 CV (control voltage) inputs (3 at the top and 2 at the bottom of the module)

 

Input #4 is a CV input for Pulse Width Modulation.

 

The rocker switch allows for quick shaping of the final mixed waveform.

You can easily add and remove different waveforms from the final mix to sculpt your sounds.

 

This is a simplier version of the 1004-T however its the rarest of the bunch