Spectran is a program to do real time or deferred spectral analysis / waterfall display, in addition to real time audio filtering (band pass, denoising, band reject and CW peaking) of audio signals, using the PC sound card to digitize the input analog signal, or taking as input a WAV file. Its characteristics are well suited to dig weak signals buried into noise, thanks to a selectable bin size down to 21 millihertz. On the opposite site, it can visualize normal CW signals, resolving individual dots and dashes (with a reasonably fast PC).

The new features of build 213 are:
Interoperability with the WSJT program of Joe Taylor K1JT
Display of the Moon AZ - EL
New "compact" mode, where just a reduced waterfall is shown, so to minimize the screen area used
The main window is now resizable
Two new palettes added, together with the option of doing an Absolute or Relative color mapping
More varieties of WAV files supported
You can now record to the WAV file either the incoming audio or the processed audio
The passband filter has now a slightly better ultimate rejection