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Re: Ack! dAck! 2.0 - HDCD??

Hi Thom,

The dAck! is 100% digital filterless, thus it does not process samples at a higher rate than the sampling frequency. HDCD decoding requires a lot of DSP and results in processing frequencies much higher than 44.1, so the dAck! will not decode it. The HDCD information is encoded as pseudo-random noise in the lowest bit so it otherwise passes through the dAck! undetected.

In terms of overall performance, we find the disadvantages of oversampling far outweigh the minor enhancement in resolution that HDCD offers; for us, resolution isn't all that great if it results in overbearing transients and in any case it is only an apparent effective increase in resolution, not a definitive one. Since we specialize in non-oversampling converters, and the dAck! has a 16-bit chipset, HDCD will definitely not be appearing as an added feature on this product.

Best,

-Chris
Ack! Industries


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