Introducing the Make Noise QPAS!
We're excited about QPAS, or Quad Peak Animation System, a new Quad Core Stereo Filter from Make Noise.
According to the QPAS page on Make Noise's website, "[t]he Quad Peak Animation System combines the auditory enveloping of stereo spaced peaks with the animation of two or more peaks in a single channel dancing around each other or engaging in primitive vocalizations. QPAS is Quad Core, containing four identical state variable filter cores with a control system powerful enough to guide them in stereo multi-peak operation, but simple enough to encourage system integration rather than domination."
QPAS is the successor to Make Noise's previous multi-mode filter offering, the MMG. Make Noise co-founder and lead designer Tony Rolando's time spent calibrating thousands of Moog Voyagers and their underappreciated stereo low-pass-filters, along with lessons learned from the development of both the MMG and QMMG, informed the design decisions which led to the creation of the QPAS.
As stated in his Story of the QPAS, " ... they [the QMMG and MMG] require many trims and specialized selection of the vactrol parts to work well and even then there is a great deal of variation from one unit to the next. That might not work well for a stereo filter. We developed several completely different cores before finding the right one."
Gone are the vactrols, the single monophonic output, the ability to self-oscillate, and the Strike and Accent inputs of the MMG. QPAS contains mono and stereo inputs, and four outputs per stereo channel: the standard Low-Pass, Band-Pass, and High-Pass, along with the new "Smile-Pass" filter's mix of highs and lows that is sure to make you smile. Strike and Accent are now occupied by two !!¡¡ "wildcard" inputs, which can accept a variety of signals and are meant to encourage experimentation by throwing all sorts of variables into the mix. Mono-to-mono, stereo-to-stereo, and mono-to-stereo conversion are all handled by clever normalizations within QPAS' circuitry.
QPAS is a worthy addition to the Make Noise lineup, and we here at Nerd Audio look forward to hopefully seeing even more stereo offerings from Make Noise in the future!