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Okto DAC8 Stereo review and measurements-Stereophile

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#3
Ye, that is really impressive... That DAC cannot properly construct a sine wave and what is the point to have a good noise floor if it cannot do essential DAC properly
 

Harmonie

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#7
Ye, that is really impressive... That DAC cannot properly construct a sine wave and what is the point to have a good noise floor if it cannot do essential DAC properly
I doubt that you can hear anything at -90db even with your ears closely against the speakers.
Even at -60db it would be a faint sound.
Compare to -99db = absolute silence.
 
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#8
I doubt that you can hear anything at -90db even with your ears closely against the speakers.
Even at -60db it would be a faint sound.
Compare to -99db = absolute silence.
? dB is a relative scale. -90dBFS can be made audible. If you have your system set up to movie reference level, -90dBFS is at 15dB SPL at the listening position--above 0dB SPL, the inaudible level. Whether it ends up audible at listening position in a room depends on many factors, but if listening position is 10 feet and you get about an inch from the speaker, that 15dB SPL becomes 55dB SPL. I think the more relevant counter to the misinformed criticism is to take a look at other DAC reviews at Stereophile and see that this is not bad performance.
 

Harmonie

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#9
? dB is a relative scale. -90dBFS can be made audible. If you have your system set up to movie reference level, -90dBFS is at 15dB SPL at the listening position--above 0dB SPL, the inaudible level. Whether it ends up audible at listening position in a room depends on many factors, but if listening position is 10 feet and you get about an inch from the speaker, that 15dB SPL becomes 55dB SPL. I think the more relevant counter to the misinformed criticism is to take a look at other DAC reviews at Stereophile and see that this is not bad performance.
? dB is a relative scale. -90dBFS can be made audible. If you have your system set up to movie reference level, -90dBFS is at 15dB SPL at the listening position--above 0dB SPL, the inaudible level. Whether it ends up audible at listening position in a room depends on many factors, but if listening position is 10 feet and you get about an inch from the speaker, that 15dB SPL becomes 55dB SPL. I think the more relevant counter to the misinformed criticism is to take a look at other DAC reviews at Stereophile and see that this is not bad performance.
Of course, I made a short cut avoiding a long post.
There are so many test cd's, Chesky and else.
The usual way is to hear at usual listening level and then get the same samples at -20db, -60db from that previous listening level.

My point was just to put in real perspective what a -90db would mean and not just on a graph.
 
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#11
Of course, I made a short cut avoiding a long post.
There are so many test cd's, Chesky and else.
The usual way is to hear at usual listening level and then get the same samples at -20db, -60db from that previous listening level.

My point was just to put in real perspective what a -90db would mean and not just on a graph.
Ok, understood.
 

Vincentponcet

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#12
? dB is a relative scale. -90dBFS can be made audible. If you have your system set up to movie reference level, -90dBFS is at 15dB SPL at the listening position--above 0dB SPL, the inaudible level. Whether it ends up audible at listening position in a room depends on many factors, but if listening position is 10 feet and you get about an inch from the speaker, that 15dB SPL becomes 55dB SPL. I think the more relevant counter to the misinformed criticism is to take a look at other DAC reviews at Stereophile and see that this is not bad performance.
If the signal is at -90dbFS, the distortions of that -90dbFS signal are significantly below, otherwise it would not even remotely looks like a sinusoid.
DAC8 Stereo measurements gives distortions at -135dbFS, so 45db below that -90dbFS signal.
 

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