Re: VLF: 8819.9 Hz in Virginia?

[wolf_dl4yhf <dl4yhf@freenet.de>]

Hello Jim,

you asked:

> Can I inspect previously captured Spectrum Lab data at higher 
resolution by accessing a data file, or perhaps by opening a new 
waterfall-display window?
Only if you logged the input ("audio") as file, *.wav or *.ogg.
From the spectra which may still reside in SL's "scroll-back" buffer 
it's impossible to re-calculate an FFT with more resolution because the 
data in that buffer are -by *default*- only amplitude spectra which 
cannot be converted back from short-time Fourier transforms into the 
time domain.
So, in short: Use SL's audio logging feature to capture the raw (or, 
maybe, slightly compressed) data.
Can be activated as shown in the manual... from the main menu: 
"File".."Audio Files and Streams"..."Save input as audio file".
Then, we can do all kinds of post-processing on the time domain data.

Cheers,
  Wolf .