Bottom Line Club, New York NY, Early Show

Torrent notes :

September 29 (30), 1980

Speed Corrected

pre-FM/FM (unknown lineage) > cassette > CDR > FLAC
Additional Lineage: FLAC > TAudioconverter (combine tracks) > Audacity > FLAC > TLH > FLAC (level 8)

Date Question:
I have this dated as September 29, 1980 although I think there is some question about that. Steve Hackett definitely mentions that
this show is in New York after Every Day. Steve Hackett played at least two shows on that date in New York. There is an audience
recording for the early show. This does not match that. So, if this is from September 29, 1980 it must be from the late show.

However, there is also a recording of an off-air FM broadcast that circulates which is dated from September 29, 1980 - I am
speaking specifically about the version shared by Lucifer Burns, edited by tonsofsobs and from the collection of S.N.(Chicago).
That off-air FM recording doesn't match this one or the early show audience recording. Certainly, radio stations will sometimes
cut out material for different broadcast but Steve Hackett says different things entirely on this recording as compared to the
off-air FM recording from the collection of S.N.(Chicago).

Steve Hackett also played at the Bottom Line in New York on September 30, 1980. That show was filmed professionally and there is
also an audience recording from Lostbrook which matches it. This definitely doesn't match that show. Were there two shows on
September 30, 1980 and if so, could this be from a different show than the video on that date?

Also, the audio quality of this is very clean. There is frequency content > 15 kHz and the waveform looks a lot more like a pre-FM
source than an off-air FM recording what with its excellent dynamics. The audience noises are quite significant though so this is
not likely to be straight from the soundboard. Could this actually be sourced from pre-FM reels from a radio station?

Speed Correction Notes:
The original audio ran fast for the most part. I say for the most part because the middle section of the show actually didn't need
speed correction. I found this quite odd. A significant clue as to why can be seen in the audio's frequency spectrum. There are
repeating high frequency harmonic peaks, which can be seen as the horizontal lines in the included spectrogram of the original audio
before speed correction. Note how right around the 30 minute mark (after Track 6: The Steppes) the lines shift, and then shift again
around the 45 minute mark (after Track 10: Jacuzzi). What that suggests to me is that this show's audio is pieced together from
multiple reels/cassettes, and evidently the speed was a bit different on them/during the transfer.

The speed corrections I applied are:
Track 1-2: -2.7%
Track 3-6: -2.3%
Track 7-10: 0%
Track 11-12: -3%
13: -2.4%
Track 14-18: -1.9%

FM Broadcast patched with master audience recording. FM Tracks are "A", Audience tracks are "B" [Simon_Funnell]

FLAC master, 13 September 2020, by elegymart:
Analog audience recording (mono) {recorded by Gene Poole}: unknown mics/stereo recorder > 1977-79 Ampex 371 Plus Series (Type I Normal) 90-minute analog audio cassette master{from the Gene Poole collection} > Sony TC-WE435 (azimuth adjustment) > Roland R05 (24/96) > Cool Edit Pro 2.0 (audio cleanup, convert to 16/44) > SHNtool (fixed SBE) > CD Wave (track splits) > TLH (WAV > FLAC8).