Quisk is a software defined radio transceiver designed particularly for amateur-radio operation. It processes I/Q samples supplied by radio hardware, tunes and filters the selected signal, demodulates received audio and sends transmit audio back to compatible hardware.
Low-latency operation is an important part of the design, particularly for full break-in CW. Quisk can also be used for SSB, AM and digital operation, and its hardware abstraction makes it suitable for several different styles of SDR transceiver.
This is free and open source software.
Key Features
- Complete SDR receiver and transmitter with graphical controls and spectrum display.
- Designed for low-latency CW operation.
- Supports SSB, AM and other common amateur-radio modes.
- Handles receiver I/Q data delivered by sound card, Ethernet or USB.
- Microphone input can be processed and sent to compatible transmitting hardware.
- Supports SoftRock radios connected through a sound card.
- Works with Hermes Lite hardware.
- Supports HiQSDR and Odyssey radios.
- Can operate radios based on the Hermes protocol.
- Provides support for additional hardware through radio-specific Python modules.
- Can be used as a panadapter alongside conventional transceivers.
- Integrates with Fldigi for digital-mode operation.
- Can exchange data and audio with WSJT-X.
- Interoperates with station-control and logging software using Hamlib-compatible interfaces.
- Supports FreeDV digital voice where the necessary components are available.
- Configuration system allows several radio profiles and station arrangements to be maintained.
Website: james.ahlstrom.name/quisk
Support:
Developer: James Ahlstrom
License: GNU General Public License v2.0

Quisk is written in Python and C. Learn Python with our recommended free books and free tutorials. Learn C with our recommended free books and free tutorials.
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