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Multiband Haas Effect by Blue Mangoo

Blue Mangoo released Multiband Haas Effect, with a great video to explain what the fuck that even means! There's also a lengthy Wikipedia article on the subject, but I'd simply describe the Haas Effect as a subtle sounding stereo widener.

The multibanded nature of Multiband Haas Effect addresses some of the problems with the Haas Effect at different frequencies. This also allows for interesting sound design options!

Multiband Haas Effect

Haas effect is a micro-delay applied to either the left or right channel of audio (but not both). This simple effect creates a realistic and natural-sounding increase in the width of the stereo field that still sounds good when mixed back to mono. It is the most simple and effective way to take a mono input and make it sound like stereo. But Haas effect has some problems. First, it can create phase cancellation problems in the bass frequencies, causing them to loose volume. Second, it can sound a bit artificial at high frequencies. This multi-band Haas effect plugin is a simple way to get the stereo width you need in the midrange frequencies without loosing the impact of the bass or making the treble sound phasey. You select any number from one to four bands, each with its own separate Haas delay setting and adjustable crossover frequencies. This makes mono audio sound wide and spacious while preserving the original tone and spectrum transparently.

Reader Comments 3

I finally understand what is the purpose of the app "Haaze 2" from KLEVGR. I would say that Multiband haas is a bit simpler to use but less powerful (one trick poney as he say himself). I will definitely reconsider using Haaze 2 as it covers several apps from Blue Mangoo...
August 12, 2020  | person_outline Hg
This could provide even more stereo interest if those knobs could be automated with an LFO (or even had a built-in LFO.

It would be like those kinds of choruses where you can have it keep your lows and highs clean and swirl the mids around. I like that-- especially for bass.

That UI couldn't be more elegant.

The Klevgr version has more bands so it might do a more interesting thing with the width. But sometimes simple is better, at least it is simpler. The big question has to do with how well the frequency filters preserve the signal integrity at the crossover frequencies.
August 12, 2020  | favorite_border stub
He chose a range ~200-2000 Hz as the critical band. (Makes sense). And the amount he chose for delay was 2-4ms. Because those frequencies (and their respective periods) correspond to those delay times, would that cause more significant destructive cancellation when summed to mono?

With any delay time you choose, when you re-sum to mono, there will be some unaffected frequencies, some reinforced (peaks) and some cancellations (dips)-- to produce some comb filtering.

This could be tested by running a familiar sound (perhaps even a mix) through the plug-in with his example settings, then re-sum it to mono and see what has happened to the sound. I think the Blue Mangoo Oscilloscope and spectragram might be useful to analyze this. However, I don't know if it has a X-freq, Y-amp kind of spectragram.
August 14, 2020  | favorite_border stub

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