NT$ 8,050
Home » Modular Synthesizer » Filter » WMD Quad Anti Aliasing Filter (QAAF)
4 independent filters in one seamless module
The WMD Quad Anti Aliasing Filter (QAAF) was conceptualized as the first expansion for the Phase Displacement Oscillator.
It is designed to eliminate aliasing and stair-step distortion from the Digital to Analog converters. We opted to make this a seperate module because it is useful by itself as well as coupled with the PDO.
- Our 4-pole filters
- Channel to Channel Freq +-0.5%
- Switched Capacitor Design
- Butterworth Response Curve
- CV Input
- Frequency Offset Knob
- Clock Input/Output
- Mix Output
- Low-Frequency Limit Jumper
- 4 HP
- Great for Pre & Post Filtering
Controls and I/O
CV Input - This input is roughly calibrated to 1v/octave. It drives a vactrol that will cause the QAAF to open quickly and close slowly.
Freq Knob - This knob controls the cutoff directly or acts as a bias/level shift control for the CV input.
CLK - This jack serves as a clock input or output, directly controlling the filter's frequencies at a ratio of 100:1. A jumper on the back (lower jumper) selects it's mode. Jump for clock output, leave open for clock input.
Inputs 1-4 - Audio Inputs, these are normaled from the expansion header going to the PDO. This normal is broken by plugging into these jacks.
Outputs 1-4 - These jacks are for each channel's outut.
Mix - This output is a sum of each channel's filtered input.
Frequency Limit Jumper - This rear jumper (upper set of pins) will limit the low frequency cutoff to about 300Hz. This will stop the QAAF from producing aliasing noise itself as it's clock frequency will be limited to 30kHz. Jump for limiting, leave open to disable.
Specs:
- Power: +12V = 35mA; -12V = 35mA
- Size: 4HP
- Depth: 40mm.
- Every WMD product is warranted for 12 months after purchase, but please contact us if you ever have problems. We will take care of you.
Reviews:
Purchase FAQ
Q1. What is the inspection period?
According to the Consumer Protection Act, online purchases come with a 7-day inspection period starting from the delivery date. Please note that the "inspection period is not a trial period." The purpose is for you to inspect and review the product, not to use it. If you are unsatisfied after inspection, please do not open or use the product and follow the return procedures immediately. Returned products must be in complete packaging with all accessories, gifts, and original packaging intact. Any missing, damaged, or incomplete items may affect your return rights and restoration costs may be deducted.
Q2. How do I process a return or exchange?
If you wish to return a product, please ensure it is in complete, new condition with the original packaging undamaged. This includes the product itself, accessories, warranty card, original packaging, and all accompanying documents. If the product is damaged due to reasons attributable to you, we may not be able to process the return, or repair costs may be deducted from the refund. However, products with manufacturing defects are exempt and qualify for unconditional return or exchange.
Please contact us by phone or email within the inspection period, providing the reason for the return/exchange, current product condition, phone number, and pickup address. We will arrange the return within 3-5 business days.
Q3. How will I receive my refund, and how long does it take?
Refund methods and timelines vary by payment method:
Credit Card: After we receive the returned product, the refund will be credited to your credit card account within approximately 5-7 business days. Depending on your billing cycle, the refund may appear on your current or next statement. Please confirm with your credit card issuing bank.
Bank Transfer: Please contact service [at] digilog.tw with your complete bank details (bank name, branch name, bank code, account holder name, account number). We will arrange courier pickup of the returned product and transfer the refund to your designated account within 5-7 business days.
Q4. Do I need to pay for shipping when sending products for repair?
Round-trip shipping costs for product repairs are the customer's responsibility.
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