Today it is used for amateur radio communication. Inventor was Rudolf Hell. The process was patented in 1929. This test contains the international testsentence: "the quick brown fox jumps over the lazy dog 1234567890 times". It don't make much sense, but this sentence contains all letters and all numbers.
Type
Wave (.wav)
Duration
1:14.536
File size
12.5 MB
Sample rate
44100.0 Hz
Bit depth
16 bit
Channels
Stereo
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920 x 245
481 x 86
375 x 30
