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Doepfer A-143-1 Quad AD /Complex Envelope Generator

DoepferSKU: 1049329

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Description

Module A-143-1 is a complex envelope generator that consists of Attack/Decay generators. For the complex envelope generator the four units are daisy-chained, i.e. the preceeding unit triggers the following unit. The four units can be used even as four separate AD generators (switch position AD) or AD-type LFOs (switch position ).

Details:

• Module A-143-1 contains four separate attack/decay type envelope generators. Each unit can be switched into a free running mode (LFO mode). The LFO mode differs in several points from a regular LFO (like A-145, A-146 or A-147): The slopes are exponential - in contrast to linear slopes of a normal LFO, and the frequency is defined by both controls. The attack control defines the time of the rising slope, the decay control the falling slope.
• Each unit has available a comparator that compares the AD output voltage with a manually adjustable threshold and switches the corresponding comparator output (Cp 1...4) to "high" as soon as the AD output voltage goes in the decay phase below this value. The comparator output is normalled to the trigger input of the next stage via the switching contact of the trigger input socket. Consequently the first unit triggers the second, the second triggers the third and so on.
• Each AD generator is equipped with a Polarizer (look at the Voltage Controlled Polarizer A-133 concerning details about the polarizer function) and a mixer that adds up all polarizer outputs. This allows to add up all AD/LFO output signals inverting or non-inverting with adjustable level to the mix output. Additionally a single output (Env 1...4) is available for each unit.
• If the trigger input of unit 1 is controlled by a normal gate signal (e.g. from a keyboard resp. MIDI-to-CV/Gate interface) one obtains a very complex envelope signal at the mix output. The signal contains 8 segments controlled by Attack 1, Decay 1, Attack 2, Decay 2, Attack 3, Decay 3, Attack 4 and Decay 4. The transition between the stages (i.e. when the following AD generator is triggered) is controlled by threshold knob. The positive or negative contribution of each unit to the mix signal is adjusted with the Mixing Polarizer control. If the trigger input of unit 1 is controlled by the comparator output of unit 4 one obtains a 8 stage LFO.
• The single AD outputs can be used to control VCAs or VCFs that open one after another corresponding to the AD signals (a little bit similar to the Shepard generator A-191).
• The default-connection between the four units (CPn = Trig.n+1) can be interrupted by patching cables into the trigger inputs. Consequently the four units can be used as separate AD generators or LFOs. In any case the mix signal is available (e.g. mix of four AD generators or LFOs with adjustable level and sign).
• In the LFO mode the comparator output serves as LFO rectangle output with adjustable pulse width (= threshold control).
• Each unit is equipped with a separate LED display for envelop and comparator output. The shortest attack/decay time is about 5 ms, the longest attack/decay times are about 3 seconds (attack) / 10 seconds (decay). By changing the value of a capacitor the shortest time can be modified

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Refund Policy

Returns & Exchanges

What if there is a problem with my order?

If there's a problem with your order, the first thing is to email us at sales@moogaudio.com. Our staff will take care of you, no matter what. The only policy we have is we'll do whatever it takes to fix the problem and make you happy.

What if I receive a defective product?

Please contact us at sales@moogaudio.com, we'll respond quickly with assistance or provide you with a return authorization (RA) number. If we determine the unit failed under warranty within 30 days of purchase, we will send you a replacement unit. 

Return Policy:

We want you to be completely happy with your purchase. If you are not satisfied with any new product, for any reason, you can return it for a refund, or store credit of the purchase price within 30 days. 

If you need to return an item because you are not completely satisfied, the return shipping costs are the responsibility of the customer, except in the case of a defect in the item. In the case of a defect, we cover the return costs.

If your purchase was eligible for free shipping, a flat fee of 10$+tx will be deducted from your refund.

Depending on the condition of the item upon return, a restocking fee between 5% and 15% will be applied. Shipping insurance is not refundable. Please note that certain exceptions apply. 

We reserve the right to deny any returns if the item does not meet our requirements and we are not responsible for any lost returns.

How to Make a Return:

We're sorry your purchase didn't work out for you. To make a return, please first email our Moog Audio Sales Team at sales@moogaudio.com to arrange for an RA (Return Authorization) number. Next, to ensure your exchange or credit is processed as quickly as possible and to help you avoid a return adjustment, please follow the below checklist:

• If you have redeemed a manufacturer rebate or promotion, your return will be subject to a restocking fee.
• Items must be returned in the condition they were received, including all accessories, documentation, and packaging materials.
• If your package was originally shipped double-boxed, please return the unit(s) double-boxed.
• The product should be packed in the original product box with the UPC codes intact.
• When repacking the product box, avoid using duct tape or other adhesives that can leave a residue.
• Remember that if your order was eligible for free shipping, a flat fee of 10$+tx will be deducted from your refund.
  

Once we've received your return, we'll process it as quickly as possible, but it can take 2-3 business days for the credit to be applied by the issuer of the credit card. Feel free to reach out to your sales person directly with any questions or concerns. 

Non Returnable Items:

There are certain items that cannot be returned for very specific reasons. These items include:

• Special orders:  These items are ordered for you only, we do not stock these items regularly.
• Software: Due to product registration issues.
• Oversized or overweight items: Due to shipping costs.
• Discontinued products, closeouts, and demo products: These items are final sales.
• Tubes: Due to their fragility.
• Personal items (earphones, harmonicas, instrument mouthpieces, etc.): For sanitary reasons.
• Authorization keys: Due to registration issues.
• Turntable cartridges and control Vinyl: Once used they cannot considered brand new anymore.

 Moog Audio reserves the right to change this policy.

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