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Steady State Fate Zero Point Oscillator Analog VCO Module

Original price $419.00 - Original price $419.00
Original price $419.00
$451.95
$451.95 - $451.95
Current price $451.95
Inventory Status:

❓ Out of stock
About Inventory Status


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In stock: It is in stock and available to ship or pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions


Questions?
Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.


Get TZFM Power At Your Fingertips With The Steady State Fate Zero Point Oscillator Analog VCO Module

The Zero Point Oscillator is not your typical analog VCO or even your standard Thru-Zero FM VCO for that matter. The core of the ZPO was developed through countless hours of experimentation involving Through-Zero modulation techniques. Through-Zero FM is a form of frequency modulation that produces much deeper and useful FM tones than a typical VCO can accomplish. New techniques have been discovered that not only improve the performance of TZFM, but also grant additional benefits as will be explained.

The Fusion of Frequency and Amplitude Modulation:

The ZPO's modulation section is a hybrid involving both TZFM (frequency modulation) and TZAM (amplitude modulation). Coupling these two techniques substantially expands the performance and tonal shaping possibilities, beyond traditional TZFM. The results are more stable and balanced across the modulation bandwidth and both TZFM and TZAM can function together or independently, and anywhere in between.  

How Thru-Zero (TZ) FM works on the ZPO:

While typical VCO frequency modulation works by increasing the oscillator frequency as the modulation source goes positive and decreasing the frequency while going negative, TZFM works by rectifying (ie flipping) the negative polarity portion of the modulation source into the positive region. You can read up on “Full Wave  Rectification” to help visualize this concept. This keeps the modulation source voltage 100% positive and effectively doubles the rate of modulation.

To fully realize the TZFM sound, the carrier VCO must also reverse direction of oscillation to simulate the requirement of going 'backwards in time' this is merely a mathematical conundrum as it is quite analogous to simply reversing the wave-form's polarity.

There have been many techniques for accomplishing this aspect of TZFM, including various VCO core types, and direction-switching techniques. The ZPO utilizes a new technique involving a tuned TZ Amplifier to accomplish this task. When applying audio rate modulation, the effect is indistinguishable from traditional TZFM with a number of added benefits, including but not limited to, more increased modulation stability, wider range of usable modulation rates, and a much broader range of tonal possibilities using the Zero Point Control.

When the TZ-MOD switch is in the active, LIN, EXP or ALL position, The applied modulation is routed to both the signal rectifier into the VCO core and the Zero Point TZ Amplifier.

The Zero Point control will then offset the balance of polarity reversal, producing an auditory change in the tonal balance of the TZ modulated waveform: TZFM will be fully balanced when Zero Point Control is centered (ie Zero Point = 0 Volts) and will be offset as the ZP control position is altered. , The TZ Amplitude modulation depth will decrease in intensity as the control approaches the +/- extremes and cease altogether at those extremes.

The effect is dependent upon choice of modulation waveform, output waveform and depth (attenuation) of modulation, but overall similar to a combination of Phase Modulation and PWM and is essentially a built in Dynamic Depth Control.

Dynamic Depth of TZFM on the ZPO:

Dynamic depth implies that the modulation source amount be varied over time. This is desired on TZ VCOs because it produces a more natural FM effect when synthesizing metallic and bell-type sounds, for instance, and more expressive modulation in general.

Traditional TZ VCO's would include a CV Input VCA for the FM input, so that an envelope can be applied to modulate the FM depth. Since the ZPO's TZFM technique utilizes a TZ VCA, this function is actually already built into the ZPO's Zero Point Control and can be modulated with an Envelope or VCO/LFO

Manufacturer: Steady State Fate
Model: ZPO
SKU: I619328-N-0-WHXA


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