On 1/23/2018 1:52 PM, Gary A. Galo wrote:
> But, I do not agree that digital EQ is necessarily more accurate. With properly designed analog EQ it's easy to get RIAA accuracy +/-0.1 dB from 20 Hz to 20 kHz, which I achieve in with the RIAA settings on my own archival phono preamp. I've designed several other RIAA phono preamps that are within +/-0.05 dB. These levels of accuracy can be achieved with any playback curve, and I doubt that a digital EQ program can do better. There may be other reasons for choosing digital phono EQ, but I don't think that superior accuracy is one of them.
I'd agree with that. The reasons I do the EQ in the digital domain are
two, neither one accuracy-related:
1. I find that the declicking software I use (iZotope Rx) does a better
job (better click elimination, fewer artifacts) if I apply it to a flat
transfer, rather than one that's been de-emphasized. So my sequence is:
Declick (using Rx)
De-emphasize (using Audition)
2. My second reason applies mostly to 78s recorded with non-RIAA
pre-emphasis: Playing them back with correct analog de-emphasis requires
some trial-and-error, which means several repeated playings of the disc.
Transferring flat and doing the de-emphasis in the digital domain means
I only play the disc once; the trial-and-error involves repeated
playings of the digital file, which doesn't damage anything.
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