Thru Zero VCO – Model 1201

Our newest 1201 VCO is based on the superb new SSI2130 chip.  The 1201 offers all the features of our original Model 1200 with massively improved range, tracking and stability.  We’ve added continuous control of pulse width modulation, and separate linear and exponential FM inputs with convenient input attenuators.

Most importantly – the 1201 offers linear Thru-Zero FM (Frequency Modulation) and PM (Phase Modulation).  When paired with a secondary oscillator, these modulation types provide extremely rich harmonic textures.  Thru-Zero (or TZ) has proven to be difficult to produce in the analog realm prior to the availability of the SSI2130 chip.

$295.00

In stock

SKU: SSL1201 Category:

Description

If you thought SSL’s original Model 1200 was cool, then you really need to check out….

Our newest 1201 VCO is based on the superb new SSI2130 chip.  The 1201 offers all the features of our original Model 1200 with massively improved range, tracking and stability.  We’ve added continuous control of pulse width modulation, and separate linear and exponential FM inputs with convenient input attenuators.

Most importantly – the 1201 offers linear Thru-Zero FM (Frequency Modulation) and PM (Phase Modulation).  When paired with a secondary oscillator, these modulation types provide extremely rich harmonic textures.  Thru-Zero (or TZ) has proven to be difficult to produce in the analog realm prior to the availability of the SSI2130 chip.

In general, the SSL 1201 is a compact, high quality, precision voltage controlled oscillator for MU-format modular synthesizers, with an impressive number of functions for a single width VCO. Capable of accurate tracking over many octaves, it is also capable of acting as a relatively flexible low-frequency oscillator (LFO).

One of three common waveforms – Triangle, variable width Rectangle, and Sawtooth may be switch selected to the Wave output, with a separate Sine output ..

Sync (“hard sync”) input can be used to lock two oscillators together to prevent “beating” effects or to provide dynamic timbral variations. The Sync input signal should be a clean rising edge (i.e. from a pulse or sawtooth wave) for best results.

Specifications

Controls 

- COARSE: Wide range pitch adjustment covering approximately 12+ octaves - (approx. 2 Hz to 20K Hz).
- FINE: Allows smaller and more precise range than the Coarse control (approx. 2 semitones).
- PW: Manual setting of rectangular pulse width from ~5% to 95%.
- LIN AMT: Amount of control voltage attenuation from the Linear LIN CV Input.
- EXP AMT: Amount of control voltage attenuation from the Exponential EXP CV Input.

Switches 

- MOD: Selects the type of linear thru-zero modulation applied - FM (Frequency Modulation) or PM (Phase Modulation)
- WAVE: Selects between triangle, pulse, and sawtooth waveforms. When in the center position, the PW and PWM controls can be altered for a wide variety of tonalities.

Inputs 

- 1V/OCT: Allows the VCO to track at 12 equal tempered semitones per octave.
- LIN CV: Provides an input for control voltages to linearly thru-zero modulate the frequency of the VCO.
- EXP CV: Provides an input for control voltages to exponentially modulate the frequency of the VCO.
- PWM: Modulates the Pulse duty cycle when the pulse waveform is selected. This control has no effect on other waveforms.
- SYNC (hard): Allows the frequency of the VCO to be slaved to another frequency, creating interesting harmonic and timbral relationships.

Outputs 

- WAVE: Output selected by the WAVE switch. ~10V P-P; +/-5V.
- SINE: Continuously available sine wave. ~10V P-P; +/-5V.

Frequency Range 

Approx. 2 Hz to 20K Hz

Power 

+15V at 27ma, -15V at 26ma, Synthesizers.com (DOTCOM) 6 pin MTA standard.

Size 

Width - One Moog Unit (MU) - 2.125" W x 8.75" H
Depth - 3" behind panel

Reviews

There are no reviews yet

Add a review
You must be logged in to post a review Log In

Related products