LINpro and LINSurround have it. As you’d expect, automatic muting and variable bit depth, 16 or 24 bits, but also a choice of 8 bit output to instantly hear how your current choice “sounds.” In addition to Triangular Probability Density Function (TPDF) and High Passed TPDF, rectangular dither is also available for educational or experimental exploration.

Rounding performs fundamental linearization, what can be thought of as very low amplitude distortion reduction, by representing all former least significant bits with one single LSB in the resulting word length–reduced version. On the other hand, truncation does not preserve any of that low amplitude information. Instead, it’s just thrown away. LINpro and LINSurround are one of the only redithering products available that offers a choice between rounding and truncation.

LINpro and LINSurround bring visual certainty to the arcane art of dithering. We’ve included real world plots of each noise shape for your viewing pleasure. These are not MATLAB simulations, they are actual plots generated by LINpro’s optimized dither engine. Notice that the -100dBFS input signal, that spike at the left side of the plot, is preserved even though the word length has been reduced to 16 bits. A 16–bit word can only encode or store 96dB of dynamic range. Any information quieter than -96dBFS should be lost when reducing the word length to 16 bits. With LIN, up to the 19th bit of the input signal is preserved, embedded in the resulting 16–bit word.

Dither is a fundamental aspect of today’s DAWs. Although not usually thought of as such, re-dithering is important DSP (Digital Signal Processing). In the distant past, much of the pioneering research on dither was performed at Bell Labs. According to information theory, you should add a pinch of noise to your digital audio every time you alter it to keep it distortion–free and to preserve program content by embedding it in the noise floor. That’s dither. Use it to make your digital audio less…“digital!”

LINone provides basic, high precision dithering at a price anyone can afford. Plus, LINone’s dither is more accurate and better sounding than the dither built into several popular DAWs. Compare LINone’s exacting action with your DAWs in–built dither. We think you’ll be surprised.