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This topic comprises 3 pages: 1 2 3
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Author
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Topic: MD compression and sound quality
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Ken Lackner
Phenomenal Film Handler
Posts: 1907
From: Atlanta, GA, USA
Registered: Sep 2001
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posted 08-28-2002 08:34 PM
Whereas a CD is 650MB, IIRC, an MD is only 120. So, it would stand to reason that audio gets considerably compressed to make an entire audio CD fit onto an MD. If that's true, it would stand to reason that the quality would be considerably less than the original CD.So, how close am I to the truth? I know that MiniDisc is supposed to be true CD quality. But then again, most people think that MP3's are, and we know they are not. So, what really is the quality of MD? It would also stand to reason that audio has to be compressed even further when recording in MDLP mode, since you can fit twice the audio (or four times with MDLP4) on a single disc. Does the quality suffer even more in that case? What I'd really like to know is how does an original CD compare to a copy of that CD recorded
- using an analog connection
- using an optical digital connection
- using MDLP
- using MDLP4
Unfortunately, I can't test this myself because my CD player does not have a digital line out, and my MiniDisc recorder doesn't support MDLP. Any info anyone has would be greatly appreciated. I've really been wondering this stuff for a long time. ------------------
This one time, at Projection Camp, I stuck a xenon bulb....
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Josh Jones
Redhat
Posts: 1207
From: Plano, TX
Registered: Apr 2000
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posted 08-28-2002 08:40 PM
MD's sound very good, partly because the use a compression algorythm that if I'm not mistaken, Dolby developed. Avoid the MDLP feature. I dont really notice a quality degrading on MDLP2 but the MDLP4 is pure shit, so I've enver used it. Avoid sony, they are too flimsy and dont hold up that well. I had one I went running with for about 6 months and after that the antiskip lost its edge. The G-protection they put in those units now is very good, I have yet to hear mine skip. as for the various recording options, it doesnt make much difference, unless you pick up hum or something. Josh
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"Film is made of silver, video is made of rust"
'nuf said
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Joe Redifer
You need a beating today
Posts: 12859
From: Denver, Colorado
Registered: May 99
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posted 08-30-2002 11:19 PM
I was talking to a Sony technician who was assisting us with the install of the 6th or 7th SDDS unit in the country (Ian help me out here if you're reading this... which SDDS did the Greenwood get?). Anyway the tech told me that SDDS uses ATRAC 2.0, same as MiniDisc, but operates differently in that it can have 6 or 8 full discrete channels, along with an MDLP4-type back up track. He did not actually use the term "MDLP4" since that was not available at the time, but that's what it sounds like to me. Minidisc is up to ATRAC 4.x I think. My Kenwood has ATRAC 4.5. Of course that is only for encoding... it can be played back on any MD player. Sharp MD recorders do not officially use ATRAC but their own compatible codec which is more or less the same.I agree that the Sony players suck much ass. They are way too quiet, no matter what type of headphones you use. The Sharp portable I have plays at sufficient volumes and sounds better than any other MD player I have ever heard bar none. The Sony's are designed to break down so that you buy more units. The same can be said for PlayStation and PlayStation 2 videogame consoles. A programmer for Capcom of Japan (the creator of the "Resident Evil" series, in fact) even said that publicly on the radio about Sony. Just buy another brand. As far as copying from analog or digital, I do prefer digital, but analog can be very good as well if you have a good connection. You just record any noise that may or may not be present in the line. I wouldn't freak out about it if you are forced to record in analog... you actually have more control over the volume and such when you do. It is unlikely that you will notice the difference unless you do countless A/B comparisons. MD's really missed the boat when Zip discs were popular.
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