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How Does Timecode Vinyl Work? (Pt. 3)
Actually Work? (Pt. 3) Since its release in 2011, the Traktor Control Vinyl MK2 has sparked curiosity among digital DJs and audio developers alike.
Below is a signal that resembles what you’ll find on the Traktor MK2 Control vinyl/CD, which has been specifically generated for this blog post by using a Raised-Cosine Filter to modulate a random sequence onto the carrier. On the original vinyl version (not shown here due to copyright), the offset can be so large that the signal floats entirely above the x-axis for multiple cycles - making zero-crossing detection impossible. First tests show that this can possibly be achieved by applying a fixed tap pattern (e.g. every 5th bit) to a 110-bit LFSR window - a form of structured decimation or undersampling.
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