[Arny Krueger]

"Robert Orban" wrote in message
news
Through hard experience I've found that with
recordings of this vintage, it really pays to find
sealed, unplayed copies even if one has to wait for them
to show up on eBay and even if one has to pay more. There
were a *lot* of bad phono playback systems in the late
60s, and even one play through some of them could audibly
damage the vinyl.

Finally, after doing this a hundred times or so I have to
observe that the audio quality of the run of the mill
vinyl from that era was pretty bad. It got a lot better
starting in mid-1969, probably because a new generation
of disc cutters was just coming on line.

I find
incomprehensible the affection that some people evidently
have for the audio quality of vinyl from that era.

Bob Orban

Who is Robert Orban?

Robert Orban is one of the most productive minds in the audio industry, and
has been so for the past 30-40 years.

http://www.orban.com/about/timeline/

Patents:
3,980,828 Reverberation system with extended frequency response
4,103,243 Method and system for controlling peak signal levels in a
bandlimited recording or transmission system employing high-frequency
pre-emphasis
4,208,548 Apparatus and method for peak-limiting audio frequency signals
4,228,368 Polarity correcting circuit
4,241,266 Peak-limiting apparatus for audio signal
4,249,042 Multiband cross-coupled compressor with overshoot protection
circuit
4,412,100 Multiband signal processor
4,460,871 Multiband cross-coupled compressor with overshoot protection
circuit
4,495,643 Audio peak limiter using Hilbert transforms
4,525,857 Crossover network
4,674,122 Encoding for the FMX companding system
4,837,824 Stereophonic image widening circuit
4,888,789 Adjustable equalizer for compensating for high frequency rolloff
and typical AM receivers
5,050,217 Dynamic noise reduction and spectral restoration system
5,168,526 Distortion-cancellation circuit for audio peak limiting
5,282,252 Audio equalizer providing reciprocal equalization plus
infinite-depth notch
5,444,788 Audio compressor combining feedback and feedfoward sidechain
processing
5,574,791 Combined de-esser and high-frequency enhancer using single pair of
level detectors
6,337,999 Oversampled differential clipper
6,434,241 Controlling the peak levels of the FM composite signal by
half-cosine interpolation
Papers:
A Short History of Transmission Audio Processing in the United States
http://www.bext.com/histproc.htm