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Alex's Collection

Led Zeppelin   04/24/1969

Fillmore West, San Francisco, CA
Source Master Reels > PCM > DAT
Media cdr   2 discs
Notes REMASTER NOTES:

'Dancing Avocade supreme (AJD/JAMESKG)

This is as close as you'll ever get the high speed reel master source. AJD owns the original PCM transfer from those reels and the reels have since been destroyed by fire. This originally came from Bill Graham's vault. The original PCM is the now definitive source, but was not widely circulating until now. This is the most complete tape circulated in this quality to date.

PCM was used before DAT machines were invented and were the first means of digital recording. An A/D signal converter was used to to encode analog audio from tape reels to (Sony recommended) BETAMAX tapes in a standard BETA machine. A PCM encoder, coupled to a VCR, enables you to record digital audio as if it was an ordinary video signal. The device also extracts the digital audio message from the video signal, the other way round, for playback.

This PCM was likely made with either the PCM-1 (1977) or the PCM-F1 (1981).

What you are receiving is a direct digital transfer done by the owner of the PCM recording, AJD, a professional audio guru. The PCM machine used for the transfer is a SONY PCM-601ESD, originally sold in 1984-1985. The PCM-601ESD had the important advantages of S/PDIF digital I/O and adjustable tracking and VCR head-matching circuits and was the best digital storage technology available at the time.

These units are pretty hard to come by these days.

I took his transfer and mastered it for release, then encoded to FLAC8. Notice it is not a "remaster" since was never actually mastered, just transferred from old media to new as the technology progressed.
Trades Allowed Yes
Ratings Show: A    Sound: A
Owned by Alex · Last Updated May 23, 2023