Hardware SDRs source and sink digital I/Q samples through USB, PCI, or other high speed interfaces.
Sound card SDRs, like the SoftRock, source and sink analog I/Q signals through sound card stereo channels. Transceiver “digimode” interfaces, like the SignaLink, source and sink demodulated audio signals through sound card mono channels.
File sources and sinks source and sink samples with ordinary files. They can indirectly support SDR hardware by reading/writing a named pipe shared with an external utility that interfaces with the SDR hardware.
IQFileSourcefor binary I/Q files
RealFileSourcefor binary real-valued files
WAVFileSourcefor WAV files