Markus wrote:

> start /belownormal ebnaut-rx.exe -f fft.wav ... -a

> sleep 38
> taskkill /im ebnaut-rx.exe

> neither ebnaut-rx nor showrawsyms will terminate itself.

The latest version 0.9 of the Windows decoder has a slightly
modified -a option:

  options:

  -N nchars    Message length in characters (no default)
  -f filename  Input file name
  -c ncpu      Number of CPU cores to use (default 1)
  -L size      Viterbi list size (default 20000)
  -p poly      Polynomial set, or alias
  -k crclen    CRC length in bits, 8 to 32 (default 16)
  -F freq      Frequency offset, Hz
  -T secs      Start time offset, seconds
  -S secs      Symbol period (default 1.0)

  -PS15    Phase search step 15 degrees
  -PS30    Phase search step 30 degrees (default)
  -PU      Search uniform phase only (default full search)

  -as      Start automatically (default start button)
  -ax      Exit automatically when run complete

http://abelian.org/ebnaut/software_ms.shtml

> the 32-bit Version of ebnaut-rx won't autostart using the -a option.

Unable to reproduce that here, but I test in the wine emulator.
Does it pick up any of the command line options, or is it just -a
that doesn't work?  Does it output any complaint to stderr stream?