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RE: To Dither or Not to Dither? J. River/PonoMusic World

Tony Lauck:
"It should be possible to measure the distortion products added to low level test tones on the analog outputs of any of the SABRE chip based DACs. Most of these are pretty linear at low levels, so the distortion ought to show up out of the noise, especially when spectrum are computed over long averaging periods, which will reduce the residual noise of the DAC chip and output amplifiers.

You may need a low noise preamp to boost the output level of the DAC so that the noise and distortion products are well within the resolution of your ADC."

Sure but isn't that academic?

I'm absolutely happy to turn on dithering with bit-depth reduction to 16-bits and regularly use the noise-shaped MBIT+ algorithm in iZotope RX for 24 --> 16-bit conversions.

As for JRiver and others, for 24-bit playback I'm agnostic on this since I don't believe it makes an audible difference in any conventional situation (assuming the dithering is only affecting the lowest bit or two). On or off IMO makes no difference for an actual DAC and I have no reason to believe anyone can hear this.

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Archimago's Musings: A 'more objective' audiophile blog.

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