By analyzing different sonic qualities of a sound and then modulating the results, Zip has a new take on the familiar compressor/expander..

What do you do when all the basic categories of signal processors have been done? Well, you invent new ones, of course.

So, normally we think of a compressor/expander as taking amplitude as input, and processing the result from that. And we assume if there’s any modulation, it’s got fixed routings. Zip turns that on its head, with multiple ways of analyzing incoming signal (not just amplitude), and then an open system for adding modulation of its various parameters.

Zip isn’t alone. I’d say we’re seeing a whole new direction in plug-ins that’s moving this direction – performing more intelligent digital analyses on sounds, using everything from new DSP to new machine learning techniques, in order to twist around existing signal processing metaphors. It’s a big break from what has been an ongoing avalanche of software that emulates traditional hardware – this is stuff that just wasn’t possible before the computer (or indeed wasn’t available to us unwashed masses until recently).

In the case of Zip, some time playing around with it already has me understanding that I might not apply this compressor/expander the way I would a conventional model. It starts to become a creative tool rather than just a utility – and more ripe for abuse. (Go ahead; turn it up all the way, set the settings wrong, start patching in modulation without a particular plan … you can’t really break anything. Yeah, there’s even a randomize button.)

Even in a fairly compact interface, you’ve really got a multi-effects plug-in as much as a unitasker tool. But it doesn’t feel tacked on – it’s all built around the compressor/expander paradigm. Pushed to the extreme, this thing is gritty and digital – but that’s not necessarily a bad thing, and subtler effects are possible.

Patchable modulation at bottom, and the light skin. (The interface is scalable – all those settings are hidden behind the gear menu at top.)

How it works

To break it down, we can think input to output:

Input analysis: Amplitude, Quietness, Brightness (high frequency bits), Darkness (low frequency bits), Tonalness (think dominant frequency response), and Noisiness (the non-tonal bits) allow you to think in musical terms. That is, there’s a more elaborate digital analysis going on here.

Yes, it’s a compressor/expander. This goes without saying, but having a conventional centerpiece to all these extra goodies helps ground them. There are also four different envelope flavors, which in fact are fairly subtle and let you tune the results to your liking. (The names – Classic, Goopy, Quick, and Extreme – sound a little more radical than they are; think of these more as getting your timing settings just right.)

Patchable modulation: This is really lovely, a signature Unfiltered feature – you can drag patch cords from modulators to wherever you like. That includes:

  • Sine, Sawtooth/Triangle and Square LFOs
  • Input Follower
  • Macro Control
  • Sample and Hold Noise
  • Step Sequencer
  • ROLI Lightpad
  • Gain Reduction

Internal effects: Saturation, bitcrusher, and filters are all built in, as well – and combined with the modulation above, get really powerful.

What it’s like to use

I’m just wrapping my head around this having had a few days to play with it – partly because the relatively conventional applications are already more flexible. But I like the creative depth here. The developers send along the following ideas. I think the ability to modulate anything, and to always have access to envelope follower and dynamic settings, is really the key:

Turned a boring bass synth into a rhythmic and punchy sequence by using the modulation system with the onboard bit crusher for some tasty grit.

Use an LFO to modulate the Threshold on a vocal to add rhythmic effect, letting the lyrics duck in time with the rest of the track.

Patch Zip’s LFOs to the Color knob to create tempo-synched filter sweeps and pulsating distortion on guitar and keyboard tracks. Zip sculpts both dynamics and tone.

Here’s me wandering around the basics of the interface – actually, these fairly vanilla effects I already found really useful.

To be honest, it’s cool enough that it makes me both want to use it more and to try some new ideas in my own (bodged-together) DIY efforts.

Here’s Todd Urban with a full tutorial/review:

And the developers made their own hands-on showing how you can sculpt sounds with this:

Full specs

More details – though the quick way to say this would be, you always have control over the sound and visual feedback on what you’re doing at each stage:

Continuously variable Color control provides post-dynamics processing in seven modes, respectively offering phase-modulated distortion, soft saturation, bitcrushing, and four 2-pole pass filters (two of which feature cutoffs modulated by Zip’s Analysis modes).

Internal and external sidechains are equipped with High Pass and Low Pass filters and an Audition button for hearing the signal the detector acts on.

Controls for wet/dry mix (for parallel compression), lookahead (affecting both sidechains), switchable peak or RMS detection, and automatic makeup gain.

Informative real-time display graphically depicts the current threshold, ratio and knee, and shows multi-colored traces for sidechain, output and gain reduction levels.

Price: US$149
Promotions: $99 through the end of November 2017
Available Formats: VST2, VST3, AU, AAX Native

Get it at Plugin Alliance:

https://www.plugin-alliance.com/en/products/unfiltered_audio_zip.html

  • Foosnark

    When I saw the announcement I got really excited — I’ve loved all of Unfiltered Audio’s plugins so far since winning G8 Gate in a charity raffle, and this one seems really innovative.

    But in practical use I just haven’t felt the magic.

    This writeup makes me think maybe I should give it another chance, and try not thinking of it as a compressor primarily. For instance, putting it on an effects send in front of a delay, and smoothly gating out darker parts.