SDRPlusPlus/root_dev/soapy_source_config.json

{
    "device": "Generic RTL2832U OEM :: 00000001",
    "devices": {
        "Generic RTL2832U OEM :: 00000001": {
            "agc": true,
            "gains": {
                "TUNER": 0.0
            },
            "sampleRate": 2560000.0
        }
    }
}