Quadrature Generator?
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MeldaProduction MeldaProduction https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=176122 - KVRAF
- 14339 posts since 15 Mar, 2008 from Czech republic
Scientific thing - creates quadrature signal - 2 same signals shifted by 90 degrees from each other 
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- KVRian
- 1059 posts since 28 Jun, 2006 from Germany
For what purpose can this be used, if I may ask 
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Tagirijus.de
Tagirijus.de
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- KVRian
- 1094 posts since 23 Sep, 2006
The best example I could think was Dolby pro logic 2 encoding, which encoded the surround left and right with 90 degree phase shifts and placed them in the LtRt mix. I once built a Dolby pro logic 2 encoder/decoder in Reaktor using 90 Degree Hilbert transform phase shifts... Which was pretty awesome. And then everything went Dolby digital and I never had a need for it 
So I'm curious what potential use cases are too.
So I'm curious what potential use cases are too.
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- KVRist
- 354 posts since 15 Nov, 2005 from Melbourne Australia
there are lots of good uses for quadrature generators, a few of the top of my head... (I havnt used the one in Mxxx but I have an analog one in my modular with 4 outputs, hence the name quadrature)
Also to make this a proper QUADrature gen, you would need to invert the two outputs, to create all 4 different phase states (0, 90, 180, 270)
Hook the 4 outputs up to 4 vca's and you have a 4 way Scanner/Crossfader type thing.
If your working in Surround sound, you can easily use this to create a 'Spin' effect, making the sound spin around the room. (my favourite use for it in my modular rig)
With a bit of trickery you can make those shepard's tone type sounds, using the different phases to both modulate the pitch of 4 osc's but also modulating the volume of each so they fade into each other.
But even just having 2 outputs (one 90deg out of phase with the other) is really useful in my opinion as a source of modulation, you can create really interesting textures and movement within a sound, as the 2 modulations are completely linked in time, but different in phase. (bad explanation but I just woke up)
I always get annoyed trying to set them up with seperate lfo's or oscillators, thanks for letting me know there is one in mxxx!
Also to make this a proper QUADrature gen, you would need to invert the two outputs, to create all 4 different phase states (0, 90, 180, 270)
Hook the 4 outputs up to 4 vca's and you have a 4 way Scanner/Crossfader type thing.
If your working in Surround sound, you can easily use this to create a 'Spin' effect, making the sound spin around the room. (my favourite use for it in my modular rig)
With a bit of trickery you can make those shepard's tone type sounds, using the different phases to both modulate the pitch of 4 osc's but also modulating the volume of each so they fade into each other.
But even just having 2 outputs (one 90deg out of phase with the other) is really useful in my opinion as a source of modulation, you can create really interesting textures and movement within a sound, as the 2 modulations are completely linked in time, but different in phase. (bad explanation but I just woke up)
I always get annoyed trying to set them up with seperate lfo's or oscillators, thanks for letting me know there is one in mxxx!