Posts

Showing posts with the label oscilloscope

Seeing is believeing? Another trick of Pseudo Science: Demo

Image
Seeing is believeing? Another trick of Pseudo Science: Demo TLDR: Analog or Digital? Magic? Source (at 4:33  D/A and A/D | Digital Show and Tell (Monty Montgomery @ xiph.org) (youtube.com)  ) How often you see a "perfect" and "smooth" sine wave on an oscilloscope (as shown above) when someone was attempting to "prove" that CD-quality music can reconstruct the analog output like the original.  To quote the exact phrase, " the analog ouput is still a perfect sine wave exactly like the original " (at 5:04  D/A and A/D | Digital Show and Tell (Monty Montgomery @ xiph.org) - YouTube ) Someone may said, "Yes, that's a perfect sine wave. Everyone can see a smooth sine wave is reconstructed from CD-quality digital input. Don't you see it? I can use an oscilloscope to reproduce the same thing myself to verify it." Hmm.. that's the art of Pseudo Science . They attempt to show "factual evidence" in front of you and tell you t...