Multi-Flanger ... anyone build it here...or know about it?

[Andre]

"Just for clarity: They are €15,- a piece of course."
I was wondering...figured as much though.
Thanks for the offer, I'll have to commit to the build first.
What does that come out to in $

john

About $18.80 at this moment

[nordine]

As i understand it, the less delay time beetween the original and the delayed signal the more dramatic the effect goes.

not so sure, but understanding 'drama' as  pitch wobbling, huge detuning, and overall seasickness on a flanger, more stages are the way to go

Feel like a challenge Nordine? 

once i toyed to death with Hollis's Ultraflanger (that means breadboard action), until it gave me a cool sounding leslie emulation (fast speed), and built it on the mods... too bad the waveform got crapped up on low speeds... what i'd do is to get finally through this ultraflanger thing (lost last time), getting a proper stable waveform, and adding to it the envelope features, plus waveform mangling of this Multiflanger... that'd be the Gigaflanger, or something of that sort

[Mark Hammer]

For an excellent explanation of what produces "dramatic" flanging effects, you are recommended to read the interview with the late Steven St. Croix in DEVICE (http://hammer.ampage.org/files/Device1-3.PDF) and Craig Anderton's Hyperflange project article (http://hammer.ampage.org/files/Hyperflange.PDF).

When people describe flanging effects as "dramatic" what they are generally referring to is a slow and ultra-wide sweep that progresses from inaudible notching/"comb-filtering" to substantial comb-filtering with a great many notches in the low end of the spectrum.  To do this, you need two fundamental features:
a) the ability to produce ultra-short delays - generally noticeably lower than 1msec, and preferably shorter than 0.5msec,
b) the ability to sweep to delays long enough to produce notches low down - generally in the range of 10msec max delay or greater.

When you compare the shortest and longest delays produced, what you end up with is a ratio.  Ideally, "jet plane" sweeps want a ratio of at least 20:1.  Looking at the venerable Boss BF-2 flanger, it produces 13:1 sweep ratio (1-13 msec).  The A/DA Flanger, well-loved for its sweep that seems to go on forever, had a 42:1 sweep (0.33 - 14 msec).

A third aspect of what makes for "dramatic" flanging is the shape of the sweep.  Typically, what the ear/brain prefers is to have the sweep decellerate as it approaches the low end of the sweep, such that at the point where the most audible notches are produced, the listener gets to "savour" their movement about.  As the circuit sweeps upwards towards ever-shorter delays, the number of notches produced are radically reduced, so the ear wants a hasty exit and quick return to downwards sweep.  This sweep waveform is referred to by some as Hypertriangular, but there are other technical terms for it.

Will the Multi-Flanger do this?  I don't know.  It certainly has the potential to produce very short delays, by virtue of using a small-capacity 256-stage BBD.  But of course, two vital pieces of info are missing: 1) does it achieve an ultra-short minimum delay, and b) how long of a maximum delay does it produce?  If it were to sweep from, say, 0.2msec to 6msec, that would yield a 30:1 ratio, but the notches produced at max delay would not go down very low, so the result would not be quite as dramatic as the A/DA's 14msec delay , where notches go down over an octave lower.