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Old 1st December 2002, 10:28 PM   #1
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Default IDE CD Player

Why doesnt someone use a computer CD-Rom Drive and instead of using the SPDIF output use the IDE output of the drive and read the data many times to establish excellent error correction, essential treat the audio as data, like a computer...

Is this possible, you'd think with 52x cd-rom's you should be able to read the dat over 50 times before actually playing anything. You should also be able to reduce jitter considerably while keeping the cost down?

Is this fesible or would SCSI be easier (maybe their both impossible). How hard would it be to make an IDE controller, a screen, some controls which would then feed to some form of good digital output like AES/EBU or something...
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Old 1st December 2002, 10:33 PM   #2
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Most cheap DVD players use IDE DVD drives. They read audio at higher speeds than 1x.
It would be interesting how they perform against pure audio equipment as the CD-Pro transports.

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Old 1st December 2002, 10:35 PM   #3
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I have a friend who uses one so that he can play cd's burned with hours of mp3's on them

It sounds ok with his sony integrated amp and a pair of pio HPM100's
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Old 1st December 2002, 10:41 PM   #4
Wombat is offline Wombat  Germany
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Me also, i have a SEG Los Angeles with a DSL710A DVD drive. I never did serious testing against my standard CD-Player.
Time to try some with both feeding my DAC.

Wombat
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Old 1st December 2002, 11:00 PM   #5
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http://www.epanorama.net/documents/pc/cdaudio.html
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Old 1st December 2002, 11:10 PM   #6
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Default Re: IDE CD Player

Quote:
Originally posted by s0rce
Why doesnt someone use a computer CD-Rom Drive and instead of using the SPDIF output use the IDE output of the drive and read the data many times to establish excellent error correction, essential treat the audio as data, like a computer...

Is this possible, you'd think with 52x cd-rom's you should be able to read the dat over 50 times before actually playing anything. You should also be able to reduce jitter considerably while keeping the cost down?
No, it wouldn't work, unless you use CDs that store the music
as data files. An ordinary music CD does not support rereading
in any reasonable way. The only thing you can do is to reread
a whole track and then it won't even be sufficient with a 52x drive
to catch up. By the way, you probably don't want a noisy
52x CDROM drive to play you music anyway.

Data CD is another thing, they store the data in blocks that can
be individually addressed and thus support efficient error
recovery by rereading data.
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Old 1st December 2002, 11:11 PM   #7
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But if I insert a Audio CD into my computer it plays it through the IDE connection (the analog audio is not connected) and I'm fairly sure that its the drive that determines if the audio can be read digitally not the cd.
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Old 1st December 2002, 11:13 PM   #8
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What about the Terratec m3po

http://www.m3po.net/
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Old 2nd December 2002, 12:06 AM   #9
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Quote:
Originally posted by s0rce
But if I insert a Audio CD into my computer it plays it through the IDE connection (the analog audio is not connected) and I'm fairly sure that its the drive that determines if the audio can be read digitally not the cd.
Hmm, not too sure about that.. There are CD player programs that play audio CDs through the IDE interface and allow you to change the speed of the music, and stuff, but are you using a special program??
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Old 2nd December 2002, 12:14 AM   #10
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I think the CD drive is able to read a audio CD and the signal goes from drives DAC through a analog wire to the soundcard. Or it could give the digital signal to the computer and software does the decoding ands put this out via soundcard DAC. You could enable DAE in device manager / CD drive / properties and windows will play CD from IDE and not analog with the drives DAC. You could disable DAE there and it will play with the drives DAC via analog connection to soundcard.
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