Griffin;605150 Wrote:
...The problem with this standard, as with many, is that it isn't
followed rigidly by everyone. And exactly that creates problems like
the one showcased here. It's a miracle it so often works at all.
I'm not sure it was ever followed rigidly by anyone, including Philips
Griffin;604936 Wrote:
I'll stir the mud up again than... AES/EBU (= AES3) is not SPDIF. It
differs in more aspects from SPDIF than just the metadata; the
electrical interface is quite different. SPDIF uses unbalanced
electrical connections with a 0.5V amplitude, AES3 uses balanced or
Griffin;604936 Wrote:
I'll stir the mud up again than... AES/EBU (= AES3) is not SPDIF. It
differs in more aspects from SPDIF than just the metadata; the
electrical interface is quite different. SPDIF uses unbalanced
electrical connections with a 0.5V amplitude, AES3 uses balanced or
The old meridian 518 sample-rate converter digital filter jitter dither
whatnot thingy had a pro setting ?
next popular standard deviation is AES over ethernet cables ? :)
who has 100 ohm impedance in mHz range maybe they are close to 110 ohm
in the frequencies used for digital audio , maybe
I went through the discussion top-to-bottom since I experienced
something of a kind, but in the end I am not sure anymore if I
understood the root cause(s) and consequences from the posts.
To illustrate: I have a rather old/rare DAC (VTL straght line 1)
featuring a not so popular UltraAnalog
congole;605024 Wrote:
I went through the discussion top-to-bottom since I experienced
something of a kind, but in the end I am not sure anymore if I
understood the root cause(s) and consequences from the posts.
To illustrate: I have a rather old/rare DAC (VTL straght line 1)
featuring a
congole;605024 Wrote:
I went through the discussion top-to-bottom since I experienced
something of a kind, but in the end I am not sure anymore if I
understood the root cause(s) and consequences from the posts.
To illustrate: I have a rather old/rare DAC (VTL straght line 1)
featuring a
Phil Leigh;605036 Wrote:
the 24-bit bitstream is simply truncated by your dac - the lowest 4 bits
are ignored. It will still sound fine (even the best consumer dacs can
only resolve 21 bits anyway!) I guess I need to remember this! The 840C (not
SOTA, but pretty darn
good) is 113dB S/N (A
Rick58;605046 Wrote:
I guess I need to remember this! The 840C (not SOTA, but pretty darn
good) is 113dB S/N (A weighted) which if I'm doing it correctly is
about 19 bits.
http://www.cambridgeaudio.com/specifications.php?PID=112Title=Specifications
yep - you got it!
--
Phil Leigh
You
Yep it is typically simplified to 6dB per bit
20*log2*bits +1,76
Code:
bits Theoretical typically Quoted S/N
16 98.0896
17 104.1102
18 110.12 108
19 116.14 114
20 122.16
Phil Leigh;604963 Wrote:
Well, having got all that theory out of the way, all I can say based on
over 25 years studio practice is that consumer s/pdif and AES/EBU turn
out to be completely interconnectable in practice under most
circumstances. I've NEVER damaged anything by connecting s/pdif
Rick58;604292 Wrote:
I hope this is what is going on with my setup, and that you excuse a
couple of 'noobie' questions.
iMac - Airport Extreme (wireless) - Touch - optical out - Cambridge
840C
The 840C indicates =20 which seems strange, when the song being
played is 16/44.1 AIFF or
But it must be a difference in some bit as his dac reports 24bit when
conected directly to his computer via toslink ?
--
Mnyb
Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH and
assorted amps SiriuS,
Mnyb;604332 Wrote:
But it must be a difference in some bit as his dac reports 24bit when
conected directly to his computer via toslink ? THANKS folks for the replies!
With the direct link, it actually indicates =24/96 which I interpret
to mean 24/96 ... but if it says =20/96 even tho in my
doh! maybe this shows how much I don't know and that's OK, if I learn
something. I don't really want to learn 'everything' about this, but
would like to understand a little more than I do now ...
The status bits that are referred to are in the data stream itself,
(i.e. the original source (FLAC,
Rick58;604384 Wrote:
doh! maybe this shows how much I don't know and that's OK, if I learn
something. I don't really want to learn 'everything' about this, but
would like to understand a little more than I do now ...
The status bits that are referred to are in the data stream itself,
Phil Leigh;604464 Wrote:
get some insulating tape and place it over the display - problem solved
:-)
LOL yes, I could not use my 'binoculars' to look at the display, I
guess! It's about 12' away, I can't quite read whether it shows 20 or 24
from my chair!
OTOH, after rereading the 'bug
Rick58;604467 Wrote:
LOL yes, I could not use my 'binoculars' to look at the display, I
guess! It's about 12' away, I can't quite read whether it shows 20 or
24 from my chair!
OTOH, after rereading the 'bug report' I see the issue MAY be related
to something the Touch itself sends:
Phil Leigh;604490 Wrote:
You might get lucky - but it's a rather niche, cosmetic issue...
Tell you what, I'll vote for the bug :-)
But wouldn't all DACs that report bit depth along with sample rate
benefit? Maybe the Cambridges are the only ones ... if so, oh well.
If you know, could you
Rick58;604467 Wrote:
Looks to me that setting Channel Status Word bit 2 to '1' (and maybe
forcing bits 3-5 to 'zero') when 24 bit data is being sent should
'solve' the issue.
The channel status word bit 2 defines the copyright bit (DCMS). It has
*nothing* to do with wordlength. I have the
Griffin;604495 Wrote:
The channel status word bit 2 defines the copyright bit (DCMS). It has
*nothing* to do with wordlength. I have the official spec on my desk at
work but ePanorama has a nice overview 'here'
(http://www.epanorama.net/documents/audio/spdif.html) (scroll down to
channel
You -can- apparently set this with alsa ? It's actually beyond me if you
actually should ?
Apearently you can also chose between consumer spdif or pro AES-EBU
over spdif .
But modern DAC's reciever chips read both format equally well afaik ?
so it should not matter much.
But consensus seems to
Mnyb;604505 Wrote:
You -can- apparently set this with alsa ? It's actually beyond me if you
actually should ?
Apearently you can also chose between consumer spdif or pro AES-EBU
over spdif .
Interestingly there is a difference between consumer and pro .
AHA ... maybe this is the
Phil Leigh;602126 Wrote:
Just to reiterate: regardless of what you put into to the Touch (or
where the volume control is set), what comes out is a 24-bit
bitstream.
However, if the s/pdif (channel status information bit(s)) are not set
correctly, then downstream devices might REPORT
Rick58;604292 Wrote:
I hope this is what is going on with my setup, and that you excuse a
couple of 'noobie' questions.
iMac - Airport Extreme (wireless) - Touch - optical out - Cambridge
840C
The 840C indicates =20 which seems strange, when the song being
played is 16/44.1 AIFF or
Phil Leigh;602126 Wrote:
However, if the s/pdif header bits are not set correctly, then
downstream devices might REPORT non-24-bit streams...
Header bits do not exist in S/PDIF, but you may have meant the
channel status information sent? This information is not mandatory and
does not directly
Griffin;602152 Wrote:
Header bits do not exist in S/PDIF, but you may have meant the channel
status information sent? This information is not mandatory and does not
directly contain information on the number of bits per word (for
consumer equipment)! Per definition, each S/PDIF sampleslice
gtb75;597847 Wrote:
Hi all - first post :)
For whatever reason, my DAC sometimes displays 23 bit when playing back
a standard 16 bit audio track from my Touch. The DAC I'm using is a dCS
Delius, but on an older firmware. Something tells me the Touch isn't
sending 23 bit (I've never
CS8412 is only usable upto 48khz input, but should be able to handle 24
bit even if the TDA1541 can't actually output the last eight.
--
slackhead
slackhead's Profile: http://forums.slimdevices.com/member.php?userid=13963
Kuja;599986 Wrote:
Are you sure about this?
I'm asking this, since I've been using my Touch with NOS Philips
TDA-1541A DAC, which can only receive 16/44.1 signal.
When I play 16/44.1 files everything is OK.
When I tried 24/96 files, my DAC could not lock to the incoming signal.
JohnSwenson;600141 Wrote:
Does the DAC lock if you set the volume to less than 100%?
John S.
Yes it does. All the way down to 0%.
--
Kuja
Kuja's Profile: http://forums.slimdevices.com/member.php?userid=32935
View
Kuja;599986 Wrote:
Are you sure about this?
I'm asking this, since I've been using my Touch with NOS Philips
TDA-1541A DAC, which can only receive 16/44.1 signal.
When I play 16/44.1 files everything is OK.
When I tried 24/96 files, my DAC could not lock to the incoming signal.
The
Kuja;599986 Wrote:
Are you sure about this?
I'm asking this, since I've been using my Touch with NOS Philips
TDA-1541A DAC, which can only receive 16/44.1 signal.
When I play 16/44.1 files everything is OK.
When I tried 24/96 files, my DAC could not lock to the incoming signal.
This
Phil Leigh;597927 Wrote:
Well, as I said the Touch ALWAYS sends a 24-bit bitstream via its
digital outputs. The DAC should always show 24, because that is what it
is being given. Maybe the dCS has some funky way of deciding what
bit-depth to display based on the actual values of the bits...
Hi all - first post :)
For whatever reason, my DAC sometimes displays 23 bit when playing back
a standard 16 bit audio track from my Touch. The DAC I'm using is a dCS
Delius, but on an older firmware. Something tells me the Touch isn't
sending 23 bit (I've never heard of 23 bit), so I'm
gtb75;597847 Wrote:
Hi all - first post :)
For whatever reason, my DAC sometimes displays 23 bit when playing back
a standard 16 bit audio track from my Touch. The DAC I'm using is a dCS
Delius, but on an older firmware. Something tells me the Touch isn't
sending 23 bit (I've never
gtb75;597852 Wrote:
That's just it... I'm connected via coax and sometimes the DAC shows 16
bit (when it should) and 24 bit (also when it should), but there are
times when the Touch is playing a 16 bit file and the DAC shows 23 bit.
It sounds fine regardless - just a little weird.
I'm
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