Software Defined Radio (SDR)

 This is Quisk, a Software Defined Radio (SDR). You supply an antenna and a
 complex (I/Q) mixer to convert the radio spectrum to a low IF. Then send that
 IF to your computer using the sound card, Ethernet or USB. The Quisk software
 will read the I/Q data, tune it, filter it, demodulate it, and send the audio
 to headphones or speakers. Quisk has a microphone input and a key input so it
 can operate as a complete transceiver.
 .
 Quisk works with this hardware:
  * SoftRock connected to the sound card
  * Many other SDR's connected to the sound card
  * SDR-IQ connected by USB
  * Perseus connected by USB
  * N2ADR hardware connected by Ethernet and IP
  * HiQSDR hardware connected by Ethernet and IP
  * The Hermes-Lite project at hermeslite.com
  * Quisk can be used as a pan adapter, and can control some radios
 .
 Quisk is small and simple, and has been designed so that it is easy to change
 Quisk to suit your own hardware. Quisk rhymes with "brisk", and is QSK plus a
 few letters to make it easier to pronounce. QSK is a Q signal meaning full
 breakin CW operation, and Quisk has been designed for low latency. Quisk
 includes an input keying signal that can mute the audio and substitute a
 sidetone.