librtlsdr-wincontrol Files

Unpack all files to SDRSharp folder, answer Yes to replace rtlsdr.dll, run SDRSharp, start rtl-sdr playback.
Then you can run librtlsdr-wincontrol.exe and move sliders.

You may use this rtlsdr.dll with osmocom or other software, of course. It is fully compatible to original one.

There are UDP server on 32323 port inside of rtlsdr.dll. It accepts and answers \n-terminated strings and accept two easy commands: get and set register. Examples:
g 5\n - will return value of R5
s 7 10 15\n - will set four lowest bits (mask 0x0f) of R7 with value 10
s 12 174 255\n - will write complete byte to R12
All values should be decimal.
You may use this feature to develop own gui controller with beauty knobs.

You may directly write registers to r820t, but be very careful, wrong combinations may DAMAGE or even KILL your dongle!