bitflipper
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That "Barber Pole" Effect
I didn't realize how common this effect is... Here's the Wikipedia link on the Shepard Tone if you're not familiar with this audio illusion.
 All else is in doubt, so this is the truth I cling to. My Stuff
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bapu
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Re: That "Barber Pole" Effect
2017/07/26 19:46:49
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I feel the need to get a haircut.
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batsbrew
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Re: That "Barber Pole" Effect
2017/07/26 20:09:43
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ooh.
so cool.
i gotta try this, figure out a way to do it with feedback guitar and vibrato bar..........
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bapu
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Re: That "Barber Pole" Effect
2017/07/26 21:00:20
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batsbrew
ooh.
so cool.
i gotta try this, figure out a way to do it with feedback guitar and vibrato bar..........
Might be easier to just buy a barber pole.
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Chandler
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Re: That "Barber Pole" Effect
2017/07/27 00:18:24
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It is a really cool effect. I love auditory illusions.
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interpolated
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Re: That "Barber Pole" Effect
2017/07/27 14:58:54
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Awesome Zimmer. Might try that some time.
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tlw
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Re: That "Barber Pole" Effect
2017/07/27 21:32:07
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Back in the what, late 70s, BBC Radio 4's original adaptation of "The Hitch-hiker's Guide To The Galaxy" used Shepard tones a lot as sound effects. Some of us spent ages trying to work out how they were created back in those pre-internet, pre-digital anything days.
A task at which we failed. Badly.
Sonar Platinum 64bit, Windows 8.1 Pro 64bit, I7 3770K Ivybridge, 16GB Ram, Gigabyte Z77-D3H m/board, ATI 7750 graphics+ 1GB RAM, 2xIntel 520 series 220GB SSDs, 1 TB Samsung F3 + 1 TB WD HDDs, Seasonic fanless 460W psu, RME Fireface UFX, Focusrite Octopre. Assorted real synths, guitars, mandolins, diatonic accordions, percussion, fx and other stuff.
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arlen2133
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Re: That "Barber Pole" Effect
2017/07/27 21:48:32
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Interesting... Wonder if I could do that in Jazz? 
Arlen aka Mr Grant my music
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Kev999
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Re: That "Barber Pole" Effect
2017/07/27 22:48:45
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Interesting. I was already aware of the concept and the Pink Floyd example (i.e. the fadeout in Echoes). Thanks for reminding me about it. I am now intending to apply the idea to a sound effect that I have been working on, a rocket taking off and ascending.
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interpolated
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Re: That "Barber Pole" Effect
2017/07/27 23:02:45
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I sometimes use con sordindo with a touch of harmonics to bring out the notes that are quite a valid note for effect. Takes away the boring synth string sound.
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b rock
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Re: That "Barber Pole" Effect
2017/07/27 23:27:09
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... i gotta try this, figure out a way to do it with feedback guitar and vibrato bar.......... It's relatively straightforward to pull off, using the original Rapture synth. And probably Rapture Pro, but less so in Dimension Pro. Plus, you can save on string breakage. - Samples loaded into an Element.
- Pitch EGs, StepGens, or LFOs ramping up (or down).
- The corresponding AMP EG, Stepgen or LFO uses a triangle or sine waveform shape, for the overlapped mixing.
- Copy Element 1 to Elements 2, 3, and 4.
- Offset each Element's Pitch Modulator shape by 90 degrees [0 - 90 - 180 - 270] in successive Elements.
- Offset by the same amounts in the corresponding AMP modulator.
Instant quadrature "LFOs", and a one-note wonder preset that'll amaze and alienate your friends You can do the same with simple oscillator sources, endless filter sweeps, quantized microtonal scales, clangorous bell tones, etc.
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dmbaer
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Re: That "Barber Pole" Effect
2017/07/27 23:55:01
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Anyone into MeldaProduction plug-ins should watch the following video tutorial. It's 18 minutes long, but well worth the time spent. What you are shown is quite amazing: an implementation of a barber pole effect using stock Melda modulators which are present in most of the Melda FX line. https://www.youtube.com/watch?v=fjZBjbsxCEs
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batsbrew
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Re: That "Barber Pole" Effect
2017/07/27 23:56:41
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b rock
... i gotta try this, figure out a way to do it with feedback guitar and vibrato bar..........
It's relatively straightforward to pull off, using the original Rapture synth.
And probably Rapture Pro, but less so in Dimension Pro. Plus, you can save on string breakage.
- Samples loaded into an Element.
- Pitch EGs, StepGens, or LFOs ramping up (or down).
- The corresponding AMP EG, Stepgen or LFO uses a triangle or sine waveform shape, for the overlapped mixing.
- Copy Element 1 to Elements 2, 3, and 4.
- Offset each Element's Pitch Modulator shape by 90 degrees [0 - 90 - 180 - 270] in successive Elements.
- Offset by the same amounts in the corresponding AMP modulator.
Instant quadrature "LFOs", and a one-note wonder preset that'll amaze and alienate your friends You can do the same with simple oscillator sources, endless filter sweeps, quantized microtonal scales, clangorous bell tones, etc.
no, no, no, no, no, no. play it for reals.
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bitflipper
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Re: That "Barber Pole" Effect
2017/07/28 16:50:19
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Or, you could position four photoresistors perpendicular to the four quadrants of an actual barber pole, configure them in a voltage divider circuit that then modulated four oscillators' frequencies.
On second thought, that would be impractical. No place to plug in your four Minimoogs out on the sidewalk in front of the barbershop.
OK, I got it. Employ a barbershop quartet who can sight-read, and position them around the barber pole! Sometimes the simplest solution is the most elegant.
All else is in doubt, so this is the truth I cling to. My Stuff
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Slugbaby
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Re: That "Barber Pole" Effect
2017/07/28 17:25:20
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I saw Dunkirk last night, and was loving the soundtrack (along with the rest of the film).
interesting to see this clip all over the internet today. I hadn't heard of this technique before, but it was really, really effective in such drawn-out tension.
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interpolated
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Re: That "Barber Pole" Effect
2017/07/28 20:08:18
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There is probably an easy way to achieve this with some of the string libraries available. Not that I plan to use this effect anytime soon, however I might try to create this effect for edumacational reasons.
Going to try something and upload it to cloudsound.
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bitflipper
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Re: That "Barber Pole" Effect
2017/07/30 16:11:48
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It should be pretty easy to do, if all you want to do is demonstrate the principle.
I'd use a synthesizer rather than a sample library, because I could then turn on portamento/glissando for a smooth rise in pitch. I'm not sure that's even necessary, but it would more closely emulate the familiar THX "Deep Note" motif that we've heard so often at the start of movies. BTW, that little piece uses 80 voices (!).
All else is in doubt, so this is the truth I cling to. My Stuff
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interpolated
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Re: That "Barber Pole" Effect
2017/07/30 23:18:28
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I like to mimic not imitate. I'm pretty sure you could automate portamento in play then add tweaks using melodyne or something. I think I have 1 piece in my mind it would be suitable for.
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kennywtelejazz
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Re: That "Barber Pole" Effect
2017/07/31 00:52:07
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Thanks for starting this thread . Wow this is sure a cool thing to investigate .
Kenny
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tlw
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Re: That "Barber Pole" Effect
2017/07/31 02:08:33
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☄ Helpfulby SF_Green 2017/07/31 02:16:01
Sonar Platinum 64bit, Windows 8.1 Pro 64bit, I7 3770K Ivybridge, 16GB Ram, Gigabyte Z77-D3H m/board, ATI 7750 graphics+ 1GB RAM, 2xIntel 520 series 220GB SSDs, 1 TB Samsung F3 + 1 TB WD HDDs, Seasonic fanless 460W psu, RME Fireface UFX, Focusrite Octopre. Assorted real synths, guitars, mandolins, diatonic accordions, percussion, fx and other stuff.
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mikedocy
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Re: That "Barber Pole" Effect
2017/07/31 13:49:11
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Another example would be the orchestra part in the Beatles "A Day in the Life". It gives the illusion of a continually rising pitch until reaching the final note. https://en.wikipedia.org/..._in_the_Life#Orchestra "Martin later described explaining his score to the puzzled orchestra: What I did there was to write ... the lowest possible note for each of the instruments in the orchestra. At the end of the twenty-four bars, I wrote the highest note ... near a chord of E major. Then I put a squiggly line right through the twenty-four bars, with reference points to tell them roughly what note they should have reached during each bar ... Of course, they all looked at me as though I were completely mad."
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AT
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Re: That "Barber Pole" Effect
2017/07/31 14:38:12
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Sir Martin channeling Ligeti? ;-)
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http://www.bnoir-film.com/ there came forth little children out of the city, and mocked him, and said unto him, Go up, thou bald head; go up, thou bald head. 24 And he turned back, and looked on them, and cursed them in the name of the Lord. And there came forth two she bears out of the wood, and tare forty and two children of them.
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interpolated
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Re: That "Barber Pole" Effect
2017/07/31 15:47:46
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Clusters work well to create psycho-acoustic illusions.
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Beepster
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Re: That "Barber Pole" Effect
2017/07/31 23:55:46
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Cool.
I'd be interested in learning about other audio "illusions" like this.
Just some names of the techniques and I can googly-fu it from there (but links would of course be welcome). I very much like this sort of thing.
Cheeeers!
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bitflipper
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Re: That "Barber Pole" Effect
2017/08/01 01:44:01
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☄ Helpfulby RSMCGUITAR 2017/08/01 06:37:03
All else is in doubt, so this is the truth I cling to. My Stuff
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Beepster
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Re: That "Barber Pole" Effect
2017/08/01 02:52:16
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interpolated
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Re: That "Barber Pole" Effect
2017/08/01 10:07:12
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Thank you bitflipper for even more useless pub (us colloq. bar) quiz knowledge ;-).
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msorrels
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Re: That "Barber Pole" Effect
2017/08/01 12:05:22
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This was very interesting. So I made a quick SONAR project to do this with a string library but I wasn't happy with the results. So in googling I found this page: https://jordaneldredge.com/blog/endlessly-rising-shepard-tone/ With a MIDI file already setup. I thought, "Great! That will save me some time". Then I found that SONAR wouldn't load it. I could play it with AIMP3 and I could load it into Reaper. But what I didn't notice is that one of the tracks actually has MIDI notes above G10 (or G8 if you use -2 for the MIDI note name offset). Reaper still loads the file and shows (??) for those notes, but SONAR just refuses and offers no insight into why. Here's a cleaned up and SONAR friendly version of the MIDI file. https://drive.google.com/...vzx_2Pac0R3c2M0anJqNXc Odd how SONAR forces a Matrix track on it when saving as MIDI though.
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bitflipper
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Re: That "Barber Pole" Effect
2017/08/01 17:46:27
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Thanks for that, Matt! I'm gonna give it a go.
All else is in doubt, so this is the truth I cling to. My Stuff
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BobF
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Re: That "Barber Pole" Effect
2017/08/01 23:52:10
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Bob -- Angels are crying because truth has died ...Illegitimi non carborundum --Studio One Pro / i7-6700@3.80GHZ, 32GB Win 10 Pro x64 Roland FA06, LX61+, Fishman Tripleplay, FaderPort, US-16x08 + ARC2.5/Event PS8s Waves Gold/IKM Max/Nomad Factory IS3/K11U
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