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The SDRPlay is a relatively inexpensive (less than $200 US) 12-bit SDR that covers 100 KHz to 2 GHz.  There is a small gap in coverage from 380 MHz to 420 MHz.  It also has multiple band pass filters in the LF/MF, HF, VHF, and UHF ranges, and a preamp/LNA for the VHF/UHF ranges.  It interfaces to computing devices via USB cable.  A simplified block diagram of the receiver is shown below.

SDRPlay Conceptual Block Diagram

The SDRPlay has a well documented API that supports multiple operating systems and hardware platforms including Windows, Linux, MacOS, Android, and Rasberry Pi.  They do not provide a proprietary SDR front end.  Popular Windows SDR front ends such as HDSDR, SDR#, and SDR-Console are supported through the extio dll framwork.  GNU Radio, Pothos, CubicSDR, and J-SDR are supported under Linux.