Download

To avoid everyone having to setup a audio file generator to test this I uploaded a test file. Just play it with VLC:
Download (dcf77.wav)

Download of the generator (tested on Windows and Linux):
Download (timegen-0.4-src.zip)
Download (timegen-0.4-bin-win.zip)

Example:
timegen -o dcf77.wav -t 2015-10-21.16:29 -m 10