Argo is a program to visually show QRSS, DFCW and other digital signals, into an easily configurable waterfall and spectrum, taking its input from the PC sound card or from an SDR receiver, through the Virtual Audio Cable
Version 2 of Argo is a major rewrite of the program, with many new functions added, new math code and new Windows audio interfacing, through the WASAPI protocol.
Choice between privileging Time resolution or Frequency resolution in the FFT computation
Spectrum display
Additional QRSS speeds
Additional FFT bin sizes, down to 44.7 uHz
Audio capturing done with 24 bits, and data processing with 64-bit floating point
Improved mapping beween FFT magnitudes and waterfall pixel brightness
Added PNG format to the optional timed screen captures
Optional sending through UDP of the FFT magnitudes data to a remote IP
Accepting Start and Stop commands from remote IP via the UDP protocol
Optional auto start and auto upload when launched
... others ...
Some of the new features of Version 2 are :
A few examples of screen captures of Argo V2 :
The finest resolution (44.7 uHz) proves useful for the reception of the very low frequency transmissions made by some radioamateurs, e.g. 5170 and 8270 Hz.
I have reports that Argo runs also under Linux, using the latest release of Wine, but with one exception. Under Windows, using the WASAPI protocol Argo can programmatically change the sound card sampling frequency on-the-fly, according to the segment of the radiofrequency spectrum desired.
Under Linux/Wine, that seems to be impossible. You must use an external program to change that frequency, then communicate the new value to Argo through a menu choice.
