Description
Versatility, power, control
The WMD MultiMode VCA is designed to be the most versatile amplifier in your modular. Period.
The MMVCA is capable of a number of useful configurations utilizing both VCAs, or as two seperate
amplifiers. It has plenty of headroom in "clean" mode or can be easily overdriven with the soft saturation circuit. You'll want to run everything through the MMVCA.
- Two Factory-Trimmed OTA VCAs
- Exponential & Linear Response
- Bipolar CV Attenuators
- Intelligent Normaling
- AC / DC I/O Signal Coupling
- Variable Saturation/Soft Clipping
- Sum Outputs
- Inverted Outputs
- Green CV LEDs
- Signal LEDs - Blue (+) / Red (-)
- 20Vpp Clean Output Range
- +40mA/-40mA Current Consumption
- 10 HP
- Skiffable
Modes of Operation
Split Mode - The MMVCA serves as two separate VCAs in this mode. Set the B CV Source switch to B = B. Plug into both VCAs and use separate CV, or just the CV from the A jack.
Bipolar VCA - This mode requires the use of both A and B channels. Set both the B CV Source and In B Normal switches to B = -A. Plug CV and signal to be polarized into the A side. Monitor from A + B. The output will be inverted through zero at 0V CV.
rossfade - Run two inputs to the A and B Jacks. Set the Xfade/FTZswitch to Xfade when in linear operation. Set the B CV Source switch to B = -A. Control crossfade with the CV A jack. Monitor on A+B Out. Works similarly in Exponential mode.
Fade Through Zero - Both VCAs set to Linear mode. Set the Xfade/FTZswitch to FTZ. Set the B CV Source switch to B = -A. Control with CV A jack. Monitor on A+B Out. This fades B to silence to A as CV goes positive.
Pan - Run audio into the A jack. Set the In B Normal switch to B = A. Set the Xfade/FTZ switch to Xfade. Monitor in stereo on both A and B Outputs. CV A will move right to left (B to A) as CV goes positive.
Spread Pan - Run audio into the A jack. Set the In B Normal switch to B = A. Set the B CV Source switch to B = B . Audio in A, CV in A. Oppose the CV knobs to control response to CV. Use the Bias knobs to set the amount of spread. Monitor in stereo on both A and B Outputs.
Spread Crossfade - Run audio into both the A and B jacks. Set the In B Normal switch to B = A. Set the B CV Source switch to B = B . Audio in A, CV in A. Oppose the CV knobs to control response to CV. Use the Bias knobs to set the amount of spread. Monitor the A+B.
Controls and I/O
CV A & CV B - These jacks and bipolar CV attenuators control the CV for each VCA. Set the knob to the center for no CV. Spin CW for normal CV operation, CCW for inverted CV operation. The CV A jack is normaled to the input of the CV B jack. The CV B jack will be disabled by setting B CV Source to -A. Green LEDs on the top right and left sides indicate the strength of the CV signal applied to each VCA.
In A & In B - These jacks are for the injection of any signal. They can be DC or AC coupled.
Out A & Out B - These jacks are the phase matched outputs for each side. These can be DC or AC coupled. The two bicolor LEDs at the top marked A and B will indicate output strength and polarity. Red for negative voltages, and blue for positive.
Out -A & Out -B - These jacks are inverted outputs for each side. If AC coupled, these jacks are buffered after the DC offset removal. The center bicolor LED at the top marked A+B indicates signal strength and polarity. Red for negative voltage, and blue for positive.
Out A+B - This is the summed output of both VCAs.
Out -A+B - This is the summed inverted output of both VCAs.
Bias A & Bias B - These knobs control the ambient amplification of each VCA. In Linear and FTZ modes, set to center will produce no output. In Xfade mode, fully CCW will produce no output.
Linear / Expo Switch - One switch for each channel. Selects the mode of operation for the VCA. Expo mode has a trimmer on the back to set the sensitivity to CV.
AC / DC Switch - This switch introduces capacitors to the inputs and outputs of both channels. AC mode can eliminate the minor DC offset produced by the VCAs. This introduction of capacitors causes a minor rolloff at low frequencies. The -6dB/octave rolloff begins at roughly 85Hz. This frequency was selected to eliminate the settling effect of lower cutoff frequencies.
Xfade / FTZ Switch - This switch is only operational in Linear mode. It introduces a DC offset to the CV of both channels allowing for smooth crossfades between the two channels. Fade Through Zero mode produces a silent center where both VCAs are simultaneously off at 0 volts CV input.
Sat / Clean Switch & Saturation Knob - This switch enables the variable saturation circuit controlled by the knob. When off, the VCAs will hard clip at 20Vpp. When on and Saturation is fully CCW, the peaks will begin to be rounded off starting at 11Vpp. The signal can still hard clip at 20Vpp. Turn Saturation CW and the circuit will compress the waveform more, adding a little bit of nice distortion. Turn Saturation fully CW for thick distorted waveforms with nice round peaks. Fully CW limits the output voltage to roughly 8Vpp.
B CV Source - Selects whether to look at the B CV jack and attenuator, or to override the input with the inverted CV signal from channel A.
B In Normal - Selects whether the signal normaled to the B In jack is the straight signal from A, or the inverted signal from A. Use for Bipolar VCA mode.
Specs:
- Power: +12V = 40mA; -12V = 40mA
- Size: 10HP
- Depth: 25mm.
- Every WMD product is warrantied for 12 months after purchase, but please contact us if you ever have problems. We will take care of you.
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Refund Policy
Returns
Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases.
Additional non-returnable items:
Gift cards
Downloadable software products
Some health and personal care items
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
Book with obvious signs of use
CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that has been opened
Any item not in its original condition, is damaged or missing parts for reasons not due to our error
Any item that is returned more than 30 days after delivery
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at alex@wmdevices.com.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Exchanges (if applicable)
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at alex@wmdevices.com and send your item to: 1145 W. Custer Pl., Unit A, Denver CO 80223
Gifts
If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.
If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.
Shipping
To return your product, you should mail your product to: 1145 W. Custer Pl., Unit A, Denver CO 80223
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.