QUADEK Digital Quadraphonic Audio Decoder
— Bring back to life the sound of your quadraphonic records! —

QUADEK implements two algorithms capable of decoding four music channels out of a stereo track: QS method is best for “Quadraphonic Sound” recordings and SQ for “Stereo Quadraphonic” recordings. Both these quadraphonic technologies gained their fame during the 70s when many bands and musicians started to experiment with quadraphonic sound: Pink Floyd, King Crimson, The Who and Miles David, to name a few. There are hundreds of great records that came out with a “Quadraphonic” label and up to now could only be decoded with specialized hardware. With QUADEK in your Mac (*) you can digitally decode those stereo tracks into quadraphonic surround and bring the experience of the quad sound into the 21st century! (*) Your Mac should be hooked up to an audio interface with four available output channels that would need to be connected to your four speakers. For more information and setup recommendations visit us at www.klankwereld.com


Virtual and physical ports

QUADEK lets you choose among virtual or physical input and output audio ports installed in your system. Physical ports represent the actual inputs and outputs of your audio hardware and virtual ports are special audio channels implemented via software that are specially useful when sending audio between applications, for instance when sending audio from iTunes to QUADEK or from QUADEK to a recording multitrack application such as Logic or ProTools. If you want to be able to send audio between apps we recommend you to try two FREE third-party utilities: Soundflower and Jack Audio, these great utilities will provide you with enough virtual ports for all your virtual routing needs.

Audio Setup

The drop-down menus on the right let you select the audio driver, input, output and buffer size that QUADEK will use. If you have installed any virtual ports (see above), they should appear in these menus. Make sure you choose a buffer size large enough so that no clicks or pops occur while using QUADEK.

Your loudspeaking system must match QUADEK’s own output numbering in the following order:
Output 1 = Left Back
Output 2 = Left Front
Output 3 = Right Front
Output 4 = Right Back

Note that the routing in QUADEK is fixed, meaning that you must have your loudspeaker system hooked up in this order so that the decoding corresponds to what you see in the interface. If, however, you need to change this routing we recommend you to use our app MATRIK (available on the Mac App Store) that handles all possible routing combinations in an intuitive interface and gives you all the control you need over your audio workflow.

Decoding Methods

QUADEK features three decoding methods: 2x: a simple duplication of Left and Right channels in both front and back stereo pairs QS: stands for “Quadraphonic Sound” decoding SQ: stands for “Stereo Quadraphonic” decoding The last two methods are implementations of well known matrix decoding techniques. You can find more information about the details of these techniques on our website www.klankwereld.com

Balance Control

The balance slider control allows you to position your listening point in the quadraphonic square. The importance of this control is vital for a good quadraphonic experience since a significant part of the decoding relies on an acoustical phenomena that consists of the cancellation of redundant information in opposite channels. For this cancellation effect to happen as best as possible you should set up the slider’s knob so that it compensates for the possible loss of intensity coming to you when you are closer to one side or a corner of the square. Note that the balance control doesn’t increase the signal, it rather acts as a gate, letting pass the full signal or decreasing it. Once the knob is positioned you can fine-tune it with the L/R and F/B numeric controls on top of the balance control.

And when you’re ready to start using QUADEK turn on the power button and let the experience begin!
Check our website www.klankwereld.com to know more about this and other uses of QUADEK

The whole app was made with Max6

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