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RE: TESTS: Round-up of Windows and Mac Audio Players.

Hi,

OK, I misread you, my bad. I thought you inferred the -215dBFS from Archimagos posted FFT (noisefloor without signal).

So yes, if what Archimago used was a 24 Bit ADC we would expect a theoretical FFT noisefloor at a level much below -144dBFS.

As the process gain of the RMAA Software is unknown or at least undocumented, it can only be inferred by comparison with systems having known process gain (e.g. Audio Precision 2).

From that I make the process gain around 33dB, so a true 24 Bit ADC should show -144dB - 33dB = -177dB using RMAA. When I have the time I'll show what RMAA Shows for a 24 bit digital (SPDIF out to in) connection.

As we only see less than 140dB FFT noisefloor with signal we may conclude that Archimago's ADC (and it is the ADC in this case) is nearly 40dB short of 24 bit performance, or that it's performance is approximately 17 Bit.

So, no matter how we slice it and dice it, his test system is limited to around 17 Bit resolution and incapable making any determination about anything beyond.

By modern standards (my much better EMU1616M is the better part of a decade old!) this is pretty much rubbish.

Thor

At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?

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