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turn a lowpass into a band or high pass
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woodster77
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Posted : Nov 11, 2013 17:58:27
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been fucking around with this tha past few days,
it works both in hardware and software,
take a lowpass plugin or synth
open a track . douplicate it and invert the phase of second track then play around with the level
when the volume is dropped there is a Bleed though in the cancelation , giving a band or high pass depending on the filter type and difference in the volumes of the two tracks
so all you guys who have a harware Lowpass filter or a plugin (driver) can get your buttery filters to do a lot more
  °°°ACTS 4:12°°°° |
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knocz
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Posted : Nov 11, 2013 19:41
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 That's a nice trick - and you'll end up with different types of filter curves that way.
Thanks for reminding me about this!
Also, think of the possibilities of doing this with something like Ableton Sampler's morph filter -> the knob that transforms a LP filter into a BP into a HP, you achieve curious filtering results.. also, with a formant filter it should also be great, I'm going to try that when I get home 
Super Banana Sauce http://www.soundcloud.com/knocz |
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woodster77
IsraTrance Full Member
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Posted : Nov 11, 2013 20:01
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would also work on old bucket brigade delays give the a low roll of instead of high roll off
sticking in really sharp notches could give you come wacky vowelly filter types..... °°°ACTS 4:12°°°° |
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woodster77
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Posted : Nov 11, 2013 20:05
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fuck ....stick a phaser on it and intergrate fx into your hardware(kinda)
shit, you could go anywhere with this,
oh and i forgot ot mention its a morphing filter, From Low to Band to High
depending on the volume of the inverted channel
so in theory cos you could use this to Duck the filter with a sidechain , cut away the bass freqs and leave the volume
probably sound shite tho...lol
°°°ACTS 4:12°°°° |
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frisbeehead
IsraTrance Junior Member
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Posted : Nov 11, 2013 20:53
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there's a lot of stuff that works like that under the hood. Like when a given equalizer let's you preview just what you're tweaking, on the inside, it has split the signal and inverted the phase on the double, so you only listen to the differences between the two and nothing else. stuff like brainworx digital v2 EQ does that.
by using two copies of the same signal, with the phase inverted on the double, using a simple notch filter on one of them would produce a band pass filter with variable width (the Q parameter). funny thing is: doesn't matter if you boost or cut, you always here just those differences.
so if you're cutting the highs with a low pass, you'll only be able to ear the highs you have cut. kind of low pass filter with it's slope backwards rather then a normal filter. but still sounds funny.
this might all be possible to do with a Reaktor ensemble if you develop the concept a little further... if you get into the habbit of say, duplicanting a signal, inverting the phase of the double, then mess about with the relative volumes and this and that, you can assemble that pretty easily 
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woodster77
IsraTrance Full Member
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Posted : Nov 11, 2013 21:35
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could be done in hardware as well. little stompbox
1 in 1 out couple of attenuators and phase switches......
why has no one alreay done this,.........
patent pending till i do some research
°°°ACTS 4:12°°°° |
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Babaluma
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Posted : Nov 11, 2013 22:44
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frisbeehead
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Posted : Nov 11, 2013 23:11
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Quote:
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On 2013-11-11 22:44, Babaluma wrote:
one of the oldest tricks in the book, as outlined in allen strange's text from the 70's. i used to do it with the moogerfooger low pass, made a great high pass filter.
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yeah, but I was right about the inverted shape of it's slope, wasn't I? (didn't test this, just made sense that it would behave like that) |
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Colin OOOD
Moderator
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Posted : Nov 11, 2013 23:41
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woodster77
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Posted : Nov 12, 2013 00:07
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i was thinking sidechain gate myself for this,have to think in reverse
it would need to suck rather than push the sidechain.....pardon my grammer °°°ACTS 4:12°°°° |
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Colin OOOD
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Posted : Nov 12, 2013 00:30
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Set up a group (or an Aux return, or an aux channel, according to your DAW - anything you can route an aux send to) with a gate on it, triggered by eg. the kickdrum. Invert the phase of the group. Then use a post-fader aux send to the group to send whatever you want sidechained; sending at 0dB will give full cancellation and a strong ducking effect, -6dB half cancellation, etc. With this technique you can sidechain multiple sounds by multiple amounts, all with just one plugin. Just make sure that any post-fader processing you apply to any of the sidechained sounds is also applied to the group, otherwise you'll destroy the phase relationships and the effect won't work.
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frisbeehead
IsraTrance Junior Member
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Posted : Nov 12, 2013 17:05
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Quote:
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On 2013-11-12 00:30, Colin OOOD wrote:
Just make sure that any post-fader processing you apply to any of the sidechained sounds is also applied to the group, otherwise you'll destroy the phase relationships and the effect won't work.
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so you mean like having two aux channels , one is a simple routing, like one would do for groups and the other a pre-fader send to another aux channel (whose volume would be determined by the send levels on each channel), so that you'd have control over how much of each element you'd send, 'cause the volume has an impact on the amount of ducking you'd get, right?
will give this a try. I've made some simple phase cancelation by doubling one track and inverting the phase on it, then some simple chops and volume automation makes some mad results as well, but this is interesting in that you can have a wide range of sounds with barely any cpu cycles involved! cool idea
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Colin OOOD
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Posted : Nov 12, 2013 17:25
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woodster77
IsraTrance Full Member
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Posted : Nov 12, 2013 17:50
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they have to share a common output or the cancellation would be nulled.
loving this, got some eurorack modoles with kinda week hipass but strong and warm lopass.
this sorts it for me
you couls also use this for processing the top and bottom frequencies different as well. now that i come to think about it,
flange on the upper half or waht ever, nice for basses
°°°ACTS 4:12°°°° |
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Domi
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Posted : Nov 13, 2013 20:59
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