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the text 'recorded by dobroide@freesound' made with noise at a frequency NOT AUDIBLE. If mixed with a common audio file (see examples in this pack) this file could be used as a digital watermark. You can see the watermark looking at the spectrogram. In Audacity, for example, select the spectrum view instead of the more commonly used waveform view. The original stereo audio file was produced with GNU/GPL Enscribe 0.0.4 by Jason Downer, then converted to converted to a single channel with Audacity
Type
Wave (.wav)
Duration
0:11.146
File size
960.1 KB
Sample rate
44100.0 Hz
Bit depth
16 bit
Channels
Mono