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In Reply to: RE: Digital improving -final posted by Todd Krieger on April 16, 2016 at 18:23:38
"..drowned by the noise". But it could be the power supply, no ?
Follow Ups:
"But it could be the power supply, no ?"
Only if it's a switching power supply.... Some of those things are nasty...... But most good DACs don't use them.
Most audio gear still use linear supplies..... Poorly designed linear supplies will make an AM radio emit 60/120 Hz "buzz" out the speaker..... But not enough to drown out a station.
Could be the clock - how do we know it's the switching ?
Scanning around, I found an old Analog Devices spec-sheet (for a 20-bit DAC) which claimed noise of -120db. But only if you employ the extra (recommended) capacitors. In reality, it was probably -115db. Still low, but some are now claiming -140db, in a complete D/A device.I then found a research paper by TI that talked about clock-noise. But the report also mentioned 'intrinsic' DAC-noise. So, you're right -the question is how much...
Edits: 04/17/16
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