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UNISON EXPLAINED.
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Vermeee
IsraTrance Full Member
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Posted : Jul 27, 2007 00:34
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Aoooo hello for all u guys
okay
my question is a simple one...but id like to have some complete answer.
What is unison in theory ? how it affect the waves in detailed way ?
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Pavel
Troll
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313
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8649
Posted : Jul 27, 2007 00:40
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From Wikipedia:
Unison is a word meaning “one sound”. In music it is used to mean that all instruments or voices are sounding at the same pitch.
In church music the words “unison” and “harmony” are used a lot. “Unison” means that everyone sings the tune. In fact, the men will be singing an octave lower than the women and children, but it is still loosely called “unison”. When the choir split into “harmony” they sing four different parts. They are no longer singing in unison.
 Everyone in the world is doing something without me |
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Vermeee
IsraTrance Full Member
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Posted : Jul 27, 2007 00:45
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okay. But why is it known to make the sound FAT ?
for what i did understand it was suspposed to make all the oscilators from the sinth to be in the same pitch ? |
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Elad
Tsabeat/Sattel Battle
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Posted : Jul 27, 2007 00:46
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from my own knowledge and ears:
unison is stereo fx , final result sound abit like sort of chorus if u like..
what it will do is to to double your sound genrator output and will send it seperatly to R L channels.
what it will cause is phase effect , since the osc are not perfectly match it sound obvious "open stereo" instead of having mono sound. it might cause the sound to sound like "detuned" while it is , which makes great effect on mind.
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Vermeee
IsraTrance Full Member
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Posted : Jul 27, 2007 01:06
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Okay so... i ll explain what i did understand.
u have a stereo sound on the sinth... it goes out on open stereo but not balacend.. so i turn on the unison
so the unison will get the WHOLE sound from the sinth ( from the R and L ) turn into mono... and then will duplicate that mono for stereo ... in the way that R and L will be the same ? it would be the same as i clone on track and let the first track wide left and the cloned track wide right ? |
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shamantrixx
Started Topics :
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549
Posted : Jul 27, 2007 01:31
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http://en.wikipedia.org/wiki/Unison
among other things it says:
On synthesizers, the term unison is used to describe two or more oscillators that are slightly detuned in correspondence to each other, which makes the sound fatter. This technique is so popular that some modern virtual analog synthesisers have a special oscillator type called "super saw" or "hyper saw" that generates several detuned sawtooth waves simultaneously. This method is often used in techno and trance.
it also has few sound examples of 8 x unison sawtooth synths so you can download them, run them trough some analyzer and let us know the results 
"It occurred to me by intuition, and music was the driving force behind that intuition. My discovery was the result of musical perception"
Albert Einstein, speaking about his theory of relativity |
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Speakafreaka
IsraTrance Junior Member
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779
Posted : Jul 27, 2007 01:48
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unison has nothing to do with stereo at all.
it is meerely several oscillators detuned against each other.
Often you will find that synths use the available polyphony to produce these extra voices, which is one reason why unison is typically employed in mono mode.
some synths may allow the voices to be panned around the stereo spectrum, but this is in addition to the unison effect, and does not form part of the effect itself. .
http://www.soundcloud.com/speakafreaka |
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fuzzikitten
Annunaki
Started Topics :
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603
Posted : Jul 27, 2007 01:52
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Playing two waves of identical pitch slightly out of tune with each other causes a flanging effect as the waves interfere and reinforce each other. This is how a flanger works.
From Wiki: "Flanging is a time-based audio effect that occurs when two identical signals are mixed together, but with one signal time-delayed by a small and gradually changing amount, usually smaller than 20 ms (milliseconds). This produces a swept 'comb filter' effect: peaks and notches are produced in the resultant frequency spectrum, related to each other in a linear harmonic series. Varying the time delay causes these to sweep up and down the frequency spectrum."
"it would be the same as i clone on track and let the first track wide left and the cloned track wide right ? "
Only if you slightly change the pitch of one of the waves otherwise you'll just hear the two waves in (seeming) mono.
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AvS
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464
Posted : Jul 27, 2007 12:09
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I dont think two oscs detuned is the same as a flanger. Yes the flanger makes a copy of the original sound but its the same pitch its just delayed plus the delay time is modulatet by an lfo.
Speakafreakas explanation of unison os the best.  |
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faxinadu
Faxi Nadu / Elmooht
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Posted : Jul 27, 2007 12:17
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AvS
Started Topics :
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464
Posted : Jul 27, 2007 16:45
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Thats not really a correct answer.
Time for some history and tech talk about unison mode on synths:
Lets look at a Jupiter 4. Its a simply polyphonic 1 osc synth. This doesnt mean that it only has one oscillator though. With polyphonic analog synths you will have to make one osc per voice. You can play 4 notes at a time with the JP4 wich means that inside it there are actually 4 oscillators, even though you call it a 1 osc synth. 1 osc just refers to how many oscs are played when you press a key, when not in mono or unison mode.
So when you engage unison mode on the JP4 and press one key, all 4 oscs are triggered at the same time wich will give you a really massive sound.
So in unison mode it becomes monophonic (actually i believe the JP4 has some sort of auto mode wich allows you to play more notes in unison, but this means that when 2 keys are pressed only two osc's are played per key).
With digital synths its more or less the same. Alot of synths pan out the osc's in unison because its alot easier to do, and cheaper than with an analog. Also some digital synth has unison with polyphony, but this usually has some sort of restrictions. Like on the Nordlead the amount of osc's per voice in unison poly mode is smaller than in unison mono mode, because of the DPS consumption.
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fuzzikitten
Annunaki
Started Topics :
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Posted : Jul 27, 2007 16:53
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Quote:
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On 2007-07-27 12:09, AvS wrote:
I dont think two oscs detuned is the same as a flanger. Yes the flanger makes a copy of the original sound but its the same pitch its just delayed plus the delay time is modulatet by an lfo.
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Christ, good catch. My bad! |
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AvS
Started Topics :
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464
Posted : Jul 27, 2007 18:53
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But actually i think that the effect produced is the same. I think that modulating the delay time of a static wave will be percived as if the pitch is going up and down. |
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faxinadu
Faxi Nadu / Elmooht
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Posted : Jul 27, 2007 19:31
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yes avs, phase modulation is a form of unison
donno about other systems, but in scope modular there is a phase mod module, that basically takes an incoming osc and has the ability to alter the phase by a control.. so the implementation is to send one osc into a number of these phase mod modules in parallel, each on dif phase setting, and mix them all for a massive detuned unison style sound.
The Way Back
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Speakafreaka
IsraTrance Junior Member
Started Topics :
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Posted : Jul 27, 2007 20:46
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this isn't the same thing.
the pitch change in delay is caused by the modulation of the delay time. If the delay time is static then there is no pitch change, and you get a sort of static chorus effect.
In a unison module, several oscilators are triggered at slightly different pitches (which does not change), which sounds slighlty like chorus, as the phase relationship between the oscs changes due to the pitch shift.
That's why on the Pro53 when starting there is often a note which is much louder then rest - all the oscs are in phase to gether when first triggered, and the free running nature of the synth prevents this from occuring again, as the phase gradually slips away.
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http://www.soundcloud.com/speakafreaka |
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