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RE: Korg DS-DAC-10R

Digital filters can potentially be more ideal in that they don't have the various non linearity distortion problems real world filter components all have.

Typical analog phono filters work by attenuating high frequencies and gaining the low frequencies. Feeding the raw uncompensated signal to the ADC means there is more sampled bits per volt of high frequency and less bits per volt of low frequency. You may be able to hear the difference due to the type of error differences introduced by doing it one way as opposed to the other.

Edit: Damn, forgot to mention noise. All the thermal, Brownian, emi interference, etc. noises that are added from all the extra circuitry in the RIAA filters removed from the equation when you go digital /edit

I've wondered about possible quality enhancements which may be open to those doing compensation in the digital domain:

I've heard some people think that using minimum phase filters on the high frequencies sounds better than using the linear phase filters that analog phono filters stages use. Since minimum phase filters are finite impulse response, I believe the only practical way to accomplish and apply them is in software.

A hybrid system where low frequencies are filtered in the analog domain and the high frequencies are compensated digitally might potentially minimize the trade offs a person looking to run minimum phase filters on the high frequencies might experience. Though, a dsp expert may have something to say about the downside of using a minimum phase filter to compensate for what was presumably a typical linear phase filter used in the original encoding during the record manufacturing. I'm not a digital signal theory expert.




Edits: 01/15/17 01/15/17 01/15/17 01/15/17 01/15/17

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Follow Ups Full Thread
Follow Ups
  • RE: Korg DS-DAC-10R - Ugly 09:18:02 01/15/17 (1)
    • Thanks! - John Elison 19:25:31 01/15/17 (0)

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