I have a brand new CMI 8738 based MD Mate PCI soundcard for sale in
Boston, MA-- I am happy to ship it. I have been using an identical
card to do bit-perfect digital transfers from a Sony DAT to my PC. The
optical daughtercard is included. Offering it here before it goes to
eBay. Email if interested: mtdecerbo at yahoo dot com.
Dear comrades,
I got hold of this CMedia sound card which looks exactly like the MD
Mate version without the pin header for the modem support. Now I also
got a digital daughtercard with 2 cinch and 2 optical connectors.
Under XP, the digital out works fine and I can record MP3s on my MD
deck. BUT, the digital in does not work at all.
I checked the digital input by connecting a separate SPDIF plug
following the pinout distributed in this forum. The LED lights up but
no digital signal seems to come across from the MD deck. What a pitty,
is it an XP driver problem or what.
Is there anyone out there experiencing the same problem with this card?
Andreas
Kind forum members
I've been using for a long time two sound cards
simultaneously, a SBLive and an MDMate
from AudioExcel (CMI8738 based) with optimal
results, using SBLive for playback and AudioExcel
for recording digital.
I've recently switched from Win98 to WinXP.
C-media drivers for WinXP show big problems
in manage a 2-cards situation.
As long as the CMI card is alone everything works
fine, after installing the SBLive the C-media mixer
stops working, it doesn't find the CMI thus
resulting in no-configurable digital input.
To use digital input of the CMI card I have to
disable SBLive in control panel, make the recording
and then re-enable the SBLive.
Do you a solution for this situation?
I've already tried many solutions but it seems
that the mixer isn't able to program the CMI
if there is another card active.
Thank you for your support
Regards
Raffaello
Just letting any of you know that I am getting good performance with
running the ASIO driver shipped with Adobe Premiere Pro 1.5 in
combination with latest Cmedia 8738 WDM driver for Windows XP. I
actually get lower latency in Logic Audio without any glitches from
the ASIO combination than I do using DirectSound. Granted, you don't
get any added benefit of using this ASIO driver over using MME or
DirectSound except for the lower latency.
Sitting down with a voltmeter and my spdif-coax equipped receiver, I
started looking for the proper pins on my "Thundering Digital 5.1"
6channel 8738 card.
It has a 2x5 pin header with one pin missing. Looking from under
the card (as in the writing is all in the proper direction) pin 1 as
per the below layout is missing. I've obtained a working spdif
output from pins 8 and 7, BUT, it is causing major ground loops /
interference in my home theater in the form as video noise. Has
anyone else got this cards' spdif out working? Do I need to use an
isolation transformer? I don't have access to a scope to properly
check the signal, but using my trusty voltmeter that output appears
to have quite a bit of dc offset. Do I need to add a decoupling
capacitor in line?
10 oo 9
8 oo 7 spdif out
6 oo 5
4 oo 3
2 o 1
I don't know the card, but I do know the chip. It has two SPDIF-inputs, one
is at CMOS level, what means that the signal must use levels of about 5
Volt and 0 volt. The other input is supposed to have a sensitivity of 0.5
volt, which is enough for coaxial SPDIF. However, the threshold of this
input is still about 2,5 volt. So the coax signal should be biassed to
(centered on) this voltage, so that te levels are just above and below the
threshold.
I tried this with resistors and capacitors, but it did not work
satisfactory. So I made a simple amplifier to make CMOS levels, and this
works well, on both inputs.
CD-ROMs usually have a digital output on CMOS levels, so you can see if this
works.
If your card has a digital input for CD-ROM too, then this will probably be
the CMOS-level input.
Then you can try to create a coax input from the two-pin input. I would try
a transformer (2x ten turns on a ring core). The primary coil is the coax
input, the secondary goes with one end to a voltage divider (potmeter, about
10 K), the other one to the chip (one of the two pins). Put a capacitor of
about 10 nanofarad from the voltage divider to ground.
Maybe you will have a better advice from someone who knows this card, but
otherwise, you could try this...
Drivers is a problem. Or maybe, the problem is in the register. Anyway, you
should have an input switch on the mixer to switch to de digital input.
Disappearance of this button is a frequent and nasty problem!
Switching between the two inputs, and also switching the POLARITY of the
inputs (gives horrible noise and distortion if wrong) shoul be on the mixer
too, under the 'advanced' button.
The chip supports 48 or 44.1 KHz, up to 24 bits. Nothing else! The number of
bits you can handle depends on the recording software.
Regards,
Michel
Gouda, Netherlands
----- Original Message -----
From: lefko8 <lefko@...>
To: <cmi833X@yahoogroups.com>
Sent: Tuesday, September 21, 2004 3:11 PM
Subject: [cmi833X] L-8738-C
> Just bought a card from computer geeks for $9.95 that has the spdif in
> as 2 pins on the board. This is an L shaped card. Unfortunately the
> documents and pin descriptions are not for this card. I tried to just
> hook up a coax cable and run a D7 into it. This did not work. I hear
> there is a difference between cmos SPDIF and audio SPDIF. I have a
> few questions here.
>
> Do I need to create a circuit to convert to CMOS SPDIF?
>
> Does anybody know what the jumpers do on this card?
>
> How do I get the driver installed that lets me control the SPDIF?
>
> I have an IWill mb with the digital option. When I use the driver I
> use for that I still get no SPDIF control. I assume I can record on
> the CD-IN since that is what those pins were originially for. But, it
> would be nice to have the driver that has the spdif on it.
>
> Also, can I get it to input at 48/24 and 44.1/24?
>
> Any answers to these questions would be appreciated
>
>
>
>
>
> --
>
> cmi833x list archive, files, settings and unsubscribe
> - http://groups.yahoo.com/group/cmi833X
>
> Xenomorph
> - http://xenomorph.net
> Tom Browne's site
> - http://www.tbrowne.demon.co.uk
> Duncan Martin's site (incl. SAQ!)
> - http://www.codebunny.org
> Cmedia
> - http://www.cmedia.com.tw
>
>
> Yahoo! Groups Links
>
>
>
>
Just bought a card from computer geeks for $9.95 that has the spdif in
as 2 pins on the board. This is an L shaped card. Unfortunately the
documents and pin descriptions are not for this card. I tried to just
hook up a coax cable and run a D7 into it. This did not work. I hear
there is a difference between cmos SPDIF and audio SPDIF. I have a
few questions here.
Do I need to create a circuit to convert to CMOS SPDIF?
Does anybody know what the jumpers do on this card?
How do I get the driver installed that lets me control the SPDIF?
I have an IWill mb with the digital option. When I use the driver I
use for that I still get no SPDIF control. I assume I can record on
the CD-IN since that is what those pins were originially for. But, it
would be nice to have the driver that has the spdif on it.
Also, can I get it to input at 48/24 and 44.1/24?
Any answers to these questions would be appreciated
i formated my pc and install windows 98se but now i can't listen any
sound, i install the "cmi 8330/c3d audio adapter" driver, but now i
need "cm8330 sb16 driver (wdm)", i found it but this driver
needs "w98.cat", i can't find this file, if anyone knows where i can
find this file please e-mailme "dendriforme@...", i will
realy thank your help.
--- In cmi833X@yahoogroups.com, "esmiller" <eriklist@e...> wrote:
> Many of the people on this group are here because they bought
> inexpensive CMI-based cards to do bit-perfect transfers.
I'm trying to play 44.1/16 wav files via s/pdif on a win-xp system,
using a CMI8738 based card and the standard CMI-delivered drivers for
this operating system.
The wav file gets corrupted somehow. I know this for sure since the
wav files contain dts encoded data, which should have been decoded by
the DD/DTS receiver connected to the s/pdif port, but is'nt.
Another s/pdif audio card plays the dts-wav files correctly - the
receiver recognizes the dts stream and decodes it.
How do you get the CMI8738 drivers / hardware in a bit-perfect s/pdif
output mode?
hello,
I've the same problem as desribed below.
First everything was working under W2000 and after a complete
reinstallation, no spdif-options anymore in the mixer... Then I
decided to switch to XP in the hope the latest drivers would support
everything but still the same problem... no advanced options in the
windows mixer or the audiorack mixer.
After looking around in xp for a while I found out that the driver
that is installed is installed for a card <without> spdif on it. It
shows the following:
Chipversion: CMI8738 6 CH without SPDIF
That explains ofcourse why there isn't any option in the mixer to
enable spdif at all!
Trying to install older drivers didn't realy worked as XP prevents
you to do so.
Isn't somewhere out here a small utility that I can use to enable
spdif on the card so that XP sees it as a new card <with> spdif on
it? Or is there maybe some solution by editing the registry in XP?
Hope someone can help me out as it's most frusting that things did
work before...
Chris
P.S. the card I have is a digisound cmi8738 4 channel
--- In cmi833X@yahoogroups.com, "Raffaello Cassetta" <blueraf@l...>
wrote:
> I've just switched from win95 to Win2kPro, I'm an AudioExcel MdMate
owner.
> (an AV511 variation with external optical + TTL inputs)
> I've downloaded latest drivers from cmedia's site.
> The card works but not the mixer.
> It's not able to change recording source nor changin spdif
parameters,
> resulting in an impossibility of recording from spdif.
>
> Any workaorund?
>
> Thank you.
>
> Blueraf
>
>
> [Non-text portions of this message have been removed]
Any opinions or experience on whether this converter,(behringer
src24/96), which also does 16/44.1 will work with the cmi chip based
soundcards. I was hoping to use it as analogue to digital converter
for recording as I have already had good results using my mini disc
digital out.
My bi girlfriend brought her phone into the locker room at a college gym and
sent them to me while I was in a business meeting
I had to share with my coworkers after the meeting cause they saw me peeking at
my phone
http://www.NudePhotoQuest.com/landing.asp?afl=TYHO
I was having the same SPDIF problems others were having with no AC3
stream being sent to my Dolby Digital receiver. All I was getting
was the PCM/stereo stream with DiVX/XViD AC3 movies. The only way
I've found to get the AC3 stream was to use VideoLan Client and
change the Audio Output Module to Win32 WaveOut extension output
under the audio preference settings. Haven't tried any other DivX
player. Don't want to screw anything else up.
--- In cmi833X@yahoogroups.com, Roger Colbeck <rcolbeck@m...> wrote:
> (check my postings on www.amdmb.com and probably on this group
about this):
>
> I have a Soyo motherboard with on-board cmi8738 based sound so it
might not
> quite be the same for you. Yes the Audiorack says you need to use
2-channel
> for SPDIF but actually you can get 5.1 sound. (I think the
Audiorack is
> referring to the analog signals that are getting routed to the
computer
> speaker setup and not to the channels being sent out on SPDIF.) It
may
> depend on the application you are running. For playing DVDs with
5.1 on my
> home stereo via SPDIF, I found I had to use PowerDVD software
(WinDVD did
> not work).
>
> ..Roger
>
> At 10:37 AM 28/11/2002 +0000, you wrote:
> >A good day to you all.
> >
> >First of all, i'd like to apologize in front, as my question might
> >somehow sound like or in fact be exactly the same as one
previously
> >answered. In this case, please excuse me, i have indeed read the
SAQ
> >and the SPDIF page, yet found it hard to get the right answer. If
> >there somehow is an answer, and it is previously been send, please
> >post a link or something :)
> >
> >Anyway, i have recently bought the trustexpertoptical, i think it
is a
> >cmi 8738 based soundcard, with optical/coaxical input and output.
> >Having spend about 55 dollars on buying a optical cord, so my comp
> >sound could be send to my amplifier (which, unfortunately doesn't
have
> >6 channel analog input), i was really disappointed i didn't get
the
> >expected 5.1 channel sound, but only stereo. Even worse, my
receiver
> >only plays the sound on the front-speakers, so i only get
emulated 3d
> >sound. Indeed so, the soundcard's trusty manual says exactly
this, and
> >of course, audiorack automatically chooses 2 channels when i
select
> >SPDIF sound.
> >
> >However, i was wondering if it was somehow possible to overcome
this
> >problem, hoping to get some decent a3d _digital_ sound output, or
at
> >least being able to send more than two channels over the optical
> >connection.
> >
> >Thank you kindly, and once again, i hope i do not offend anyone
with
> >my ignorance.
> >Migh
> >
> >
> >
> >--
> >
> >cmi833x list archive, files, settings and unsubscribe
> > - http://groups.yahoo.com/group/cmi833X
> >
> >DigitalMods
> > - http://www.digitalmods.com
> >Xenomorph
> > - http://xenomorph.net
> >Tom Browne's site
> > - http://www.tbrowne.demon.co.uk
> >Duncan Martin's site (incl. SAQ!)
> > - http://www.codebunny.org
> >Cmedia
> > - http://www.cmedia.com.tw
> >
> >
> >
> >Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
I have an IWILL XP333-R motherboard that has an onboard CMEDIA CMI8738
MX audio controller. I also have the IWILL SuperAudio bracket that
supplies coaxial and optical S/PDIF connectivity to the motherboard.
Motherboard web site:
http://www.iwillusa.com/products/ProductDetail.asp?vID=25&CID=93#
I'm running WinXP with the latest patches and drivers available from
Microsoft. I have verified that the CMEDIA chip is not sharing an IRQ
with another device. My problem is that when I attempt to record
S/PDIF from my external DAT deck via a coaxial cable that I ended up
crackle in the .WAV file. The music can be heard but the crackle is
constant.
Any suggestions would be appreciated.
The poll should have included a question about those who have a CMI-
833X card which is advertised to have Digital Audio I/O capabilities,
but the card does not have the capabilities because the manufacturer
lied on the packaging about these features.
I have a card that was purchased soley for these capabilities, which
it was advertised to be able to do, but could not do, because they
used a vresion of the CMI chip that had the Digital I/O removed.
The following cmi833X poll is now closed. Here are the
final results:
POLL QUESTION: Following recent conversations
on "perfect digital transfers" using
S/PDIF 44.1KHz input, how satisfied
are you about the performance on your
C-media CMI8738 chipset soundcard /
motherboard with this feature?
Thanks for taking part!
Adrian (list owner)
CHOICES AND RESULTS
- 100% perfect (I can verify this by comparing samples with original digital
media), 2 votes, 33.33%
- 100% perfect (Well, it sounds faultless!), 4 votes, 66.67%
- 98% (There is something not quite right, but it's acceptable), 0 votes, 0.00%
- 70% (Samples definately have some noise present) , 0 votes, 0.00%
- 10% (Deadful noise, I wouldn't continue using S/PDIF input), 0 votes, 0.00%
- 0% (Haven't tried using S/PDIF input yet!), 0 votes, 0.00%
- -10% (Is this yahoo poll really necessary?), 0 votes, 0.00%
For more information about this group, please visit
http://groups.yahoo.com/group/cmi833X
For help with Yahoo! Groups, please visit
http://help.yahoo.com/help/us/groups/
Enter your vote today! A new poll has been created for the
cmi833X group:
Following recent conversations
on "perfect digital transfers" using
S/PDIF 44.1KHz input, how satisfied
are you about the performance on your
C-media CMI8738 chipset soundcard /
motherboard with this feature?
Thanks for taking part!
Adrian (list owner)
o 100% perfect (I can verify this by comparing samples with original digital
media)
o 100% perfect (Well, it sounds faultless!)
o 98% (There is something not quite right, but it's acceptable)
o 70% (Samples definately have some noise present)
o 10% (Deadful noise, I wouldn't continue using S/PDIF input)
o 0% (Haven't tried using S/PDIF input yet!)
o -10% (Is this yahoo poll really necessary?)
To vote, please visit the following web page:
http://groups.yahoo.com/group/cmi833X/surveys?id=1156579
Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.
Thanks!
Sounds like perhaps there is some resampling going on in the
Terratec, although I thought it had true 24/96 ability.
Do you have it set to the same bit rate as the LaserDisc?
I bought a $14 card based on the CMI8738 because I was unhappy with
the digital transfers from my DAT to my (otherwise nice) Yamaha 744-
based sound card.
I found out that the Yamaha (like the Soundblaster Live and Audigy)
resampled the incoming digital information no matter what bitrate
everything was set to.
As far as the audibility of this, I was skeptical at first, then
A/B'd the results after making my first transfer with the 8738 (and
my homemade coax adapter). It was an album with my girlfriend doing
lead vocals, and the difference brought tears to my eyes. It was as
if she was in the room with me.
Many of the people on this group are here because they bought
inexpensive CMI-based cards to do bit-perfect transfers.
My experiences with perfect digital transfers were originally with a Sonic
Solutions edit workstation, a Tascam DA20 DAT recorder and a very old Kenwood CD
player. I have done a lot of editing with this setup, including merging the same
piece of audio after splitting it manually, sample accurately. I never noticed
any change in sample values, and if I did, It was because it really wasn't the
same spot.
For your conveniance (and because of the name of this group, and because it is
interesting), I just did another experiment, using
-Computer with ZoltrixNightingale and home-brew coaxial input
-Sony 59ES DAT-recorder
-Denon DCD-635 CD-player.
-Cool Edit Pro software
First, I made two copies of a DAT-tape with lute music.
Loaded these in Cool Edit Pro
Searched the same spot by a distinct lute note, and trimmed the beginning of
both recordings on the highest sample of this note.
Then I copied the left channel of recording 1 over the right channel of
recording 2.
Now my screen looked more or less like yours, but without the differences
between the channels!
With the 'channel mixer', I subtracted the channels from each other, and only
perfect silence remained. Zero samples only!
Next, I did the same experiment with a CD, using the DAT recorder as
optical-coaxial converter.
Same result, exept for a regular pattern of noise pulses, coming from a scratch
on the CD. Between these pulses, again absolute zero!
Looking at your screenshot, I would say that there must have been a kind of
re-sampling and-or redithering.
Maybe because of AC3 logic (dsp!) in the LD player?
Regards,
Michel.
----- Original Message -----
From: "sfdsdgdsg" <de_haro@...>
To: <cmi833X@yahoogroups.com>
Sent: Thursday, November 06, 2003 9:13 PM
Subject: [cmi833X] Re: Perfect digital transfer, it's possible?
> Thank you for your answers, and excuse me for my bad english.
>
> This is what I have:
>
> -LD player (Pioneer CLD-D925), with Toslink optical output.
>
> -Sound card Terratec Aureon 5.1 Sky, with Toslink optical input.
>
> And this is what I want to do:
>
> I would like to transfer the digital sound track of some movies on
> LD to my Hard Disk, with any loss of quality, this mean perfect
> transaction bit to bit.
>
> The sound on LD is digital PCM (the same system on CD audio).
>
> I'm sure that I'm transfering the digital track because the digital
> output on the LD player only can out the digital track. The movie
> also have a analog audio track, but this track can not be out to the
> digital output, only to the analog one.
>
> I'm sure that the digital transaction is far to be perfect because I
> do two consecutive transfers of the same sound, later I compare the
> two samples and the waveform is diferent.
>
> Of course, I strip the zero samples and start comparing from the
> first real audiosample.
>
> Take a look here and you will see what I mean:
>
> http://personales.ya.com/deharo/digitalsoundtest.JPG
>
> I have try to use a portable computer with digital output instead
> the LD player, and I have the same results.
>
> Michel, you say you have done perfect transactions, how have you
> verified that? What hardware have you used? Please, tell me what
> source (CD player, LD, minidisc), what sound card (manufacturer and
> model) and what kind of conections, optical or coaxial. Your
> information is very important for me.
>
> Thank you
>
>
>
>
> --
>
> cmi833x list archive, files, settings and unsubscribe
> - http://groups.yahoo.com/group/cmi833X
>
> Xenomorph
> - http://xenomorph.net
> Tom Browne's site
> - http://www.tbrowne.demon.co.uk
> Duncan Martin's site (incl. SAQ!)
> - http://www.codebunny.org
> Cmedia
> - http://www.cmedia.com.tw
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
On Thu, 06 Nov 2003 20:13:59 -0000
"sfdsdgdsg" <de_haro@...> wrote:
[snip]
> -Sound card Terratec Aureon 5.1 Sky, with Toslink optical input.
Google tells me the 'Sky' is a Via HT based card. I don't know much about that
chipset but maybe it's one of those that resamples digital input.
[snip]
> http://personales.ya.com/deharo/digitalsoundtest.JPG
oooh, nasty :o)
>
> Michel, you say you have done perfect transactions, how have you
> verified that? What hardware have you used? Please, tell me what
> source (CD player, LD, minidisc), what sound card (manufacturer and
> model) and what kind of conections, optical or coaxial. Your
> information is very important for me.
I'm not Michel, but....
I've used a Zoltrix Nightingale and now use a Terratec Aureon *Fun*. Both of
those are CMI based cards (the focus of this group). For each one I verified
the transfers were perfect by recording an audio CD and comparing the waveform
with that grabbed with a CD ripper (from multiple drives for good measure). I
saved the waveforms as raw PCM, stipped the leading 0s using a little perl
script, made the lengths equal then just did a MD5 check on the resulting files.
I've also used a SGI Indy (obviosuly not CMI based) with the same result.
The Zoltrix and Nightinghale tests I did optical->optical, for the Indy I went
Optical->Electrical via a Midiman CO2 convertor.
Duncan
Thank you for your answers, and excuse me for my bad english.
This is what I have:
-LD player (Pioneer CLD-D925), with Toslink optical output.
-Sound card Terratec Aureon 5.1 Sky, with Toslink optical input.
And this is what I want to do:
I would like to transfer the digital sound track of some movies on
LD to my Hard Disk, with any loss of quality, this mean perfect
transaction bit to bit.
The sound on LD is digital PCM (the same system on CD audio).
I'm sure that I'm transfering the digital track because the digital
output on the LD player only can out the digital track. The movie
also have a analog audio track, but this track can not be out to the
digital output, only to the analog one.
I'm sure that the digital transaction is far to be perfect because I
do two consecutive transfers of the same sound, later I compare the
two samples and the waveform is diferent.
Of course, I strip the zero samples and start comparing from the
first real audiosample.
Take a look here and you will see what I mean:
http://personales.ya.com/deharo/digitalsoundtest.JPG
I have try to use a portable computer with digital output instead
the LD player, and I have the same results.
Michel, you say you have done perfect transactions, how have you
verified that? What hardware have you used? Please, tell me what
source (CD player, LD, minidisc), what sound card (manufacturer and
model) and what kind of conections, optical or coaxial. Your
information is very important for me.
Thank you
Thanks for the explanation about the digital formats on the LaserDisk.
I knew it as an analog video format, but I did not know that it had digital
audio. Therefor, the problem did not make sense to me. Very interesting.
I suppose, it does not alter the diagnoses, unless the audio was indeed
converted from the analog track...
Regards,
Michel.
----- Original Message -----
From: Duncan Martin <stuff@...>
To: <cmi833X@yahoogroups.com>
Sent: Wednesday, November 05, 2003 9:23 PM
Subject: Re: [cmi833X] Perfect digital transfer, it's possible?
> On Wed, 5 Nov 2003 16:44:29 +0100
> "Michel van der Mark" <michel@...> wrote:
>
> > If you mean by 'Laser Disc' an ordinary CD,
> [snip]
>
> Laser Disc was/is a 12" optical video format, came before DVD, never
caught on. The question is if the OP is using a laser disc player and
playing a music CD or trying to record the audio from a laserdisc. If
memory serves; Laserdiscs have 2 audio tracks, one analogue and one digital
(16bit PCM). Later on the analogue track was used for AC-3. From the
digital track, everything should work as for a CD. For the analogue track
the SPDIF probably wouldn't even switch on in the case of a 'proper'
analogue track.
>
> Perhaps the OP could give some more details as to why they think the
transfer isn't perfect. It certainly is possible, I've done it a few times
and verified it as such.
>
> Duncan
>
>
> --
>
> cmi833x list archive, files, settings and unsubscribe
> - http://groups.yahoo.com/group/cmi833X
>
> Xenomorph
> - http://xenomorph.net
> Tom Browne's site
> - http://www.tbrowne.demon.co.uk
> Duncan Martin's site (incl. SAQ!)
> - http://www.codebunny.org
> Cmedia
> - http://www.cmedia.com.tw
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
On Wed, 5 Nov 2003 16:44:29 +0100
"Michel van der Mark" <michel@...> wrote:
> If you mean by 'Laser Disc' an ordinary CD,
[snip]
Laser Disc was/is a 12" optical video format, came before DVD, never caught on.
The question is if the OP is using a laser disc player and playing a music CD or
trying to record the audio from a laserdisc. If memory serves; Laserdiscs have
2 audio tracks, one analogue and one digital (16bit PCM). Later on the analogue
track was used for AC-3. From the digital track, everything should work as for
a CD. For the analogue track the SPDIF probably wouldn't even switch on in the
case of a 'proper' analogue track.
Perhaps the OP could give some more details as to why they think the transfer
isn't perfect. It certainly is possible, I've done it a few times and verified
it as such.
Duncan
If you mean by 'Laser Disc' an ordinary CD, I can imagine that it is almost
impossible to find the same starting point again. if you are lucky, there are
some zero samples preceding the audio. So you must strip of these zero samples
and start comparing from the first real audiosample on. This should work, unless
the zero's are coming from a muting cirquit on the cd player.
I found that consecutive transfers do give the same samples, if you can
synchronize the samples on a distinct peak or click in the audio. And a part
from error-interpolation of course...
Regards,
Michel van der Mark,
Gouda, NL
> ----- Original Message -----
> From: "sfdsdgdsg" <de_haro@...>
> To: <cmi833X@yahoogroups.com>
> Sent: Wednesday, November 05, 2003 12:10 PM
> Subject: [cmi833X] Perfect digital transfer, it's possible?
>
>
> > I'm trying to do a digital transfer without any loss between a Laser
> > Disc and my digital sound card using the optical connections.
> >
> > But a find random diferences between consecutive transfers of the
> > same track that meke me think that something it's wrong.
> >
> > Anybody can confirm if its possible a perfect digital transfer or
> > i'm trying to do something impossible?
> >
> >
> >
> >
> >
> > --
> >
> > cmi833x list archive, files, settings and unsubscribe
> > - http://groups.yahoo.com/group/cmi833X
> >
> > Xenomorph
> > - http://xenomorph.net
> > Tom Browne's site
> > - http://www.tbrowne.demon.co.uk
> > Duncan Martin's site (incl. SAQ!)
> > - http://www.codebunny.org
> > Cmedia
> > - http://www.cmedia.com.tw
> >
> >
> >
> > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
> >
>
>
I'm trying to do a digital transfer without any loss between a Laser
Disc and my digital sound card using the optical connections.
But a find random diferences between consecutive transfers of the
same track that meke me think that something it's wrong.
Anybody can confirm if its possible a perfect digital transfer or
i'm trying to do something impossible?