drmatt wrote: > NICAM was an interesting technology, but it was only used on the > broadcast side. A VCR recorded analogue audio. Maybe you knew that, I > wasn't clear from your post so just clarifying. >
VHS HiFi added a track that was buried under the video track, using a different carrier frequency than the video. If memory serves, both the video and the audio were recorded with FM. The audio data was recorded via FM which with the parameters chosen hardly gave even just 60 dB SNR and 50-15 KHz bandwidth, but it was also companded to boost the perceived dynamic range. For a little while VHS HiFi had some advocates as an alternative to Redbook CD optical, which was also emerging at about the same time. However, Redbook CD quickly captured everybody's interest and as the saying goes the rest is history. Tape always picks up problems when used heavily, and also big exposures to suboptimal storage and handling. It also has problems with rapid access to different parts of the media. CD media has no known relevant usage or storage limits if treated reasonably. I buy 100s of CDs from estate sales and some have to be decades old. I've digitized over 1,000 of them in the past two years with no problems that a bath with hot soapy water couldn't cure (less than 10 discs even just needed a bath.). Not one! I don't inspect them except very superficially at point of purchase. Like: "Is there a CD in this case?" This includes discs that were bought loose - with no packaging. ------------------------------------------------------------------------ arnyk's Profile: http://forums.slimdevices.com/member.php?userid=64365 View this thread: http://forums.slimdevices.com/showthread.php?t=106519 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
