How to enumerate bits quickly using DeBruijn sequences.
Today we performed a wildly scientific comparison of a few audio codecs using an oscilloscope and La Linea.
Scientific Test Protocol
We acquired a framegrab from Google Image search and converted it into a list of points using a handheld vectorization device.
The vectorized Linea was then rendered into an audio file and displayed on a common oscilloscope operating in x/y-mode. In this mode the left channel controls deflection of the beam along the x axis, and the right the y axis.
Uncompressed
(download audio) For comparison, this is the uncompressed signal, showing la Linea in a characteristic pose.
La Linea on a scope
MP3, 160 kilobit
(download audio) Encoded with lame -b 160, to match the bit rate of the Vorbis encoded stream.
La Linea, compressed with MP3
Vorbis, 160 kilobit
(download audio) Encoded by oggenc, using the default settings
La Linea, compressed with Ogg Vorbis
Conclusion
As can be plainly seen, Ogg Vorbis (left) is the superior codec for vector imagery.
Ogg Vorbis (left) vs MP3 (right)
From the same lab, Pål's waffle machine.