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Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

perhaps we're discussing different subjects

I'm talking about quality.


"Negative gain per dollar after the X point for sure."

What your graph implied was that the more $ you throw at something (in this case a DAC), at some point, X, the quality will begin to decrease. That's not right.

Maybe you're taking a business approach and talking about ROI. That would be an entirely different issue and my comments had nothing to do with that context.


"adding more of one factor of production, while holding all others constant"

A DAC is not just a D-A converter (ie, a chip) -- it is a system (chips, power supplies, filters, caps, resistors, etc). Why would anyone confine themselves to improving only one part of a system and expect the entire system to reach its maximum potential?

Business approach again?


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