What is an all-analog quad core processor?

Great question—the Make Noise QPAS Quad Peak Animation System is a stereo filter that goes beyond simple filtering into a new realm of pings, resonant sweeps, and otherworldly modulation. A worthy successor to the long-missed MMG, the QPAS is a Eurorack filter like no other.

Filling an obvious gap in their already very complete lineup of modules, the QPAS sounds excellent as a simple filter: just plug in a sawtooth or square wave, adjust the Freq and Q knobs, and immerse yourself in the spectacularly squelchy sound. Much of the QPAS's magic, however, comes from three very special features: stereo operation, multimode output, and the Radiate parameter.

First things first: the QPAS offers true stereo operation, along with many conveniences for mono-to-stereo and stereo-to-mono normalization—that is, you don’t need exclusively stereo sources to fully use the module’s stereo capabilities. This brings us to the outputs—all eight of them (wow). QPAS offers lowpass, bandpass, highpass, and Smile-Pass outputs for its left and right channels, enabling truly complex sonic combinations and unusual stereo effects when using different filter types at different positions in the stereo field. But wait, what is Smile Pass?

Smile Pass is a very special filter type that creates lovely notching effects in the output spectrum: it sounds somewhat like a phaser when modulated, and unlike the other filter types, it keeps the overall output amplitude relatively constant. And it’s aptly named—it definitely brings a smile to our faces.

QPAS FEATURES

• Quad Peak Animation System: a quad peak stereo filter and resonator for Eurorack modular synthesizers
• Inspired by Tony Rolando’s time at Moog calibrating the unique Minimoog Voyager dual filter
• Capable of creating formant vowels, resonant pings, and more
• True stereo operation with mono-to-stereo and stereo-to-mono normalization
• Input VCA for automating the level of signal introduced to the filter network
• Typical filter controls fully intact: Frequency, Q, and associated CV inputs are front and center
• True stereo outputs, with four filter types per output: Lowpass, Highpass, Bandpass, and Smile Pass
• Smile Pass provides unique phaser-like effects while maintaining relatively constant output volume
• Radiate controls and CV inputs control displacement of the individual peak frequencies from the base Frequency setting
• Radiate Left and Radiate Right controls operate independently for spectacular stereo effects and isolation of pairs of peaks
• The ever-mysterious !!!! inputs provide unexplained but spectacular-sounding effects from accents to explosions and inharmonic pseudo-aliasing crunch
• Guaranteed to be awesome
• CV inputs and appropriate attenuators for every parameter!

More information - Make Noise Music