_           _ _     _                                                   
| |__  _   _(_) | __| |  _   _ _ __    _____      ___ __                 
| '_ \| | | | | |/ _` | | | | | '__|  / _ \ \ /\ / / '_ \                
| |_) | |_| | | | (_| | | |_| | |    | (_) \ V  V /| | | |               
|_.__/ \__,_|_|_|\__,_|  \__,_|_|     \___/ \_/\_/ |_| |_|               
                                                                         
           _                                 _             _ _          _
 _ __ ___ (_)_  _____ _ __    ___ ___  _ __ | |_ _ __ ___ | | | ___  __| |
| '_ ` _ \| \ \/ / _ \ '__|  / __/ _ \| '_ \| __| '__/ _ \| | |/ _ \/ _` |
| | | | | | |>  <  __/ |    | (_| (_) | | | | |_| | | (_) | | |  __/ (_| |
|_| |_| |_|_/_/\_\___|_|     \___\___/|_| |_|\__|_|  \___/|_|_|\___|\__,_|
                                                                         
  __               _ _                _                      _   _       
 / _| ___  ___  __| | |__   __ _  ___| | __  ___ _   _ _ __ | |_| |__    
| |_ / _ \/ _ \/ _` | '_ \ / _` |/ __| |/ / / __| | | | '_ \| __| '_ \   
|  _|  __/  __/ (_| | |_) | (_| | (__|   <  \__ \ |_| | | | | |_| | | |  
|_|  \___|\___|\__,_|_.__/ \__,_|\___|_|\_\ |___/\__, |_| |_|\__|_| |_|  
                                                 |___/                   
                          /\                             /\
      /\         /\      /  \    /\                     /  \
_____/  \___    /  \____/    \  /  \  /\_______/\______/    \____ _  _   _
            \  /              \/    \/
             \/

Do you have a half broken old mixer lying around? (For example that crap
MACKIE Mixer u need to dispose of!)...you can turn it into a cool super analog
freak synth. No soldering or electro engineering required! You don't even have
to use glue or tape...All you need are some cables! (and maybe a limiter and
some FX pedals)

We will make this synthesizer by feeding its output in its own input creating
a feedback loop where the mixer will keep amplifying its internal circuit noise.
This feedback loop will be controlled and shaped with the EQ and volume controls
on the mixer.

***WARNING***
BE sure to put the volume on your speakers low...I would also advise not to do
this on any precious monitor speakers you have, just use some old crap speakers
to be safe cause this synth is going to be EXTREME and it might blow up your
speakers or anything else in the signal path.

DO NOT USE headphones!!!!!
Maybe connect a limiter just to be safe....maybe really do cause it is
going to be LOUD and mostly uncontrollable!

So all you gotta do:
Be sure the volume faders/knobs are down.
Connect the AUX outputs of the mixer to the input channels of your mixer.
Thats it. You have created a feedback loop that is controllable with the
EQ, AUX send and volume knobs. Slowly turn up the volume faders and kind
of see where it goes...it will come in slowly like a seabreeze wave but
will quickly transform in a gargantuan tsunami of sound...so move the
sliders with the upmost delicacy.
You can change the frequency and sound "color" by tweaking the EQ knobs and
changing the volume and AUXillery ammount. More BASS eq will make the
pitch go down, high EQ up etc.
You can connect as many inputs to as many Aux outs making a sort of poly-
phonic feedback synth, which you can play by sliding the volume faders...

check out this mp3 for an example of how this will sound:
http://electro-music.com/forum/phpbb-files/zero_input_mixing__open_air_recording_final_103.mp3

Here is a schematic of the Feedback Fractal synth:

            inputs               AUX out    main outs 

                   ,------<--2-------,         
                  |                  |      ,------>---- to speakers/amp
                  V  ,---1---<---,   |      | ,----->--- etc.
                  |  |           |   |      | |
            ___=__=__=__=__=_____=___=______=_=______
           |   1  2  3  4  5    aux1 aux2   outputs  |
           |                    send send            |
           |   o  o  o  o  o                 : :     |
           |   o  o  o  o  o     o    o      : :     |
           |   o  o  o  o  o                 : :     |
           |                                         |      
           |   |  |  |  |  |     o    o      | |     |
           |   =  |  =  |  |                 = =     |
           |   |  =  |  =  =                 | |     |
           |   |  |  |  |  |     mackie              | 
           |_________________________________________|
             crappy mixer

Don't expect to get any smooth scaled synth sounds straight away,
this is going to be all over the audible noise spectrum from swooping sub
lows to sweeped high bleeps. Unpredictable chaos is all yours...

This is especially good for the more rawer experimental type of music
styles...drone noise or just weird effects.

You can also tune a sound for each mixer channel, pitch them to scale
and play notes by sliding the faders up and down.
Like in this movie example: http://vimeo.com/30074885

Add some FX such as delay, phasers, filters, more EQ, tremelo, vibrato,
overdrive etc. the possibilities are endless! No need to get a
7000 euro EMS synthi or Buchla (not really but still its fun)

More in depth information about feedback synthesis here:
http://electro-music.com/wiki/pmwiki.php?n=Articles.FeedbackOrNoInputMixing