Its always difficult squinting as circuit boards but it seems to me that
both volume controls are digital - one affects the digital output level
and the other affects the digital level entering the DAC. There might
be a variable shunt after the DAC chip but I can't find anything
between the DAC
Jenks Wrote:
Its always difficult squinting as circuit boards but it seems to me that
both volume controls are digital - one affects the digital output level
and the other affects the digital level entering the DAC. There might
be a variable shunt after the DAC chip but I can't find
dwc Wrote:
Jenks, Search a bit on it or PM Sean, I think he has explained somewhere
in tech terms how the different volume controls work.
It's a digital volume control for both the analog and digital output.
Which means it's controlled by the SlimServer software plust SB
firmware.
--
Courtesy Robin Bowes:
dBu measurement is referenced to 0.7746v (often rounded to 0.775v),
i.e.:
dBu = 20log10(v/0.7746v)
where v is the rms voltage, 0.775v in this case (rounded from 0.7746v).
--
dwc
dwc's Profile:
dmsmit1 Wrote:
I recently bought an SB3. It is connected to an Adcom stereo preamp,
then to a Parasound amp. The sound is very good. I expect it would be
even better with the SB3 going directly to the amp, but noticed a post
about a bug that can result in the SB3 sending full scale
Barry,
The title of the post was Extremely loud white noise from
Squeezebox?!.
URL:
http://forums.slimdevices.com/showthread.php?t=19309highlight=white+noise
--
dmsmit1
dmsmit1's Profile:
Quoting ezkcdude [EMAIL PROTECTED]:
I think you should be careful,
indeed. sorry about the mispost
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Is this in Bugzilla anywhere?
I have only witnessed this once in normal use, when I unplugged a lamp
transformer from an adjacent mains socket.
This lead me to suspect that a noise spike on the mains supply had
disrupted the Xilinx RAM configuration somehow, and if so it's
potentially an issue
95bcwh Wrote:
Thanks Dan dmsmit1 for pointing me to the right direction.
As I read those threads, it does seems to me that although this white
noise thing rarely occured, but the consequence can be extremely
severe. However, I also noted that it seems like Slimdevices had then
introduce
Dan,
Can you help me to understand just one last thing, which still
doesn't make sense to me. I keep reading that the volume control on SB3
is digital. If it's strictly digital, doesn't it mean when we lower
the volume, the analog output voltage should remain unchanged, because
all we do is
dmsmit1 Wrote:
I recently bought an SB3. It is connected to an Adcom stereo preamp,
then to a Parasound amp. The sound is very good. I expect it would be
even better with the SB3 going directly to the amp, but noticed a post
about a bug that can result in the SB3 sending full scale
I recently bought the A23, after 22+ years using a Haffler 220. Very
nice sound.
The A23 has adjustable input levels - knobs on the back, separate for
left and right, so not useful as volume controls (use the Adcom for
that). Need an accurate meter if you want to ensure L/R balance.
Turning
search for white noise or white noise death in the general forum.
I think it can still happen in rare cases, and some kind of attenuator
should be used.
-Dan
--
dwc
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