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Jeff's Collection

Grateful Dead   02/18/1971

Capitol Theater, Port Chester, NY
Recording SHNID 107
Source SBD -> Dolby A Reel -> Dolby A decode -> DAT -> Sound Forge NR -> CD-R
Media SHN   2 discs
Notes AT244





Grateful Dead
February 18, 1971
Capitol Theatre, Port Chester, NY

SBD -> Dolby A Reel -> Dolby A decode -> DAT -> Sound Forge NR -> CD-R

The Sound Forge noise reduction was used to attenuate a very narrow
frequency band (in the vicinity of 8000 Hz) which was present as
interference on the original reels. See my notes below for details.

Disc 1

Set 1
1. Bertha (7:13) *
2. Truckin' (11:03)
3. It Hurts Me Too (7:42)
4. Loser (8:21) *
5. Greatest Story Ever Told (3:45) * >
6. Johnny B. Goode (3:39) *
7. Mama Tried (3:29)
8. Hard To Handle (8:01)

Disc 2

1. Dark Star > (7:03)
2. Wharf Rat * > (7:21)
Set 2
3. Dark Star > (7:14)
4. Me And My Uncle (4:04)
5. Lucky Lager Dance Time (2:39)
6. Casey Jones (6:10)
7. Playing In The Band (5:09)
8. Me And Bobby McGee (6:06)

Disc 3

1. Candyman (9:46)
2. Big Boss Man (5:40)
3. Sugar Magnolia (8:29)
4. St. Stephen > (5:57)
5. Not Fade Away > (4:33)
6. Goin' Down The Road Feeling Bad > (5:01)
7. Not Fade Away (3:59)
8. Uncle John's Band (6:44)

* first performance

The original reels of the Port Chester run of '71 were audibly
tainted due to a cable problem. The result is a tone which hovers
around 8000 Hz with an amplitude of about +20 dB above the noise
floor. This translate to a very annoying pitch, especially during quiet
sections, which is in the old-tv-tube or lousy-hard-disk or maybe even
the-sound-you-hear-after-you-slam-your-head-against-a-concrete-wall
class of 'whine'. Because this interference is 'monochromatic' it's
easy to get rid of if you have the processing power and a quick
FFT algorithm. I used the filter-shaping capabilities of the Sonic
Foundry Noise Reduction Plugin to tailor a very narrow notch filter
which attenuated the interference without affecting the rest of the
signal. And it's all done in the digital domain. Huzzah!

As a side note, I actually ended up crafting many filters to process
these shows. The frequency of the interference actually drifted anywhere
from 7700 to 8100 Hz during a given show. This was probalby due to a
slightly wandering reel speed. It made my work harder but when I tried
a much wider filter I started to be able to hear the attenuation in the
music. The filters generally go like this:

25 dB /- - - - - - - -\
/ \
/ \
0 dB | |
7830 7900 7970

The end result is no more annoying whine!

I also removed some of the nasty mic feedback in the 2/18/71 Bertha
using this type of filter.

Leigh Orf <orf@mailbag.com>

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length expanded size cdr WAVE problems filename
7:13.47 76491788 --- -- ---xx gd-1971-02-18-d1-t01.wav.shn
11:02.67 116934428 --- -- ---xx gd-1971-02-18-d1-t02.wav.shn
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8:20.61 88343516 --- -- ---xx gd-1971-02-18-d1-t04.wav.shn
3:51.69 40910732 --- -- ---xx gd-1971-02-18-d1-t05.wav.shn
3:39.32 38706908 --- -- ---xx gd-1971-02-18-d1-t06.wav.shn
3:29.25 36926444 --- -- ---xx gd-1971-02-18-d1-t07.wav.shn
8:00.42 84770828 --- -- ---xx gd-1971-02-18-d1-t08.wav.shn
7:03.49 74732492 --- -- ---xx gd-1971-02-18-d2-t01.wav.shn
7:20.36 77700716 --- -- ---xx gd-1971-02-18-d2-t02.wav.shn
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4:04.19 43086332 --- -- ---xx gd-1971-02-18-d2-t04.wav.shn
2:39.43 28148780 --- -- ---xx gd-1971-02-18-d2-t05.wav.shn
6:10.00 65268044 --- -- ---xx gd-1971-02-18-d2-t06.wav.shn
7:23.10 78168764 --- -- ---xx gd-1971-02-18-d2-t07.wav.shn
6:08.04 64924652 --- -- ---xx gd-1971-02-18-d2-t08.wav.shn
9:46.40 103464524 --- -- ---xx gd-1971-02-18-d3-t01.wav.shn
5:39.38 59889020 --- -- ---xx gd-1971-02-18-d3-t02.wav.shn
8:29.20 89834684 --- -- ---xx gd-1971-02-18-d3-t03.wav.shn
5:56.52 62920748 --- -- ---xx gd-1971-02-18-d3-t04.wav.shn
4:33.39 48248972 --- -- ---xx gd-1971-02-18-d3-t05.wav.shn
5:01.22 53148188 --- -- ---xx gd-1971-02-18-d3-t06.wav.shn
3:58.60 42124364 --- -- ---xx gd-1971-02-18-d3-t07.wav.shn
6:43.47 71199788 --- -- ---xx gd-1971-02-18-d3-t08.wav.shn
151:32.56 1603961568 B (totals for 24 files, 0.5449 overall compression ratio)


Size: 833 MB
Trades Allowed Yes
Lists grateful dead
SHNID 107
SBD -> Dolby A Reel -> Dolby A decode -> DAT -> Sound Forge NR?-> CD-R; via Orf; disortion removed digitally (see <a href="http://orf.cx/notch.html">notes</a>); <a href="http://orf.cx/badnr.html">more info</a> comparing Orf's NR to the WBOTB version; note the (possibly reextracted?) Orf version went to abgd 12/99 via D. Hollister, J. Sachs (md5s shown as "abgd", kindly provided by Eric Noon: note 2 versions- abgda, posted to abgd 1/19/00, has d2t2 sig different from Eric's abgdb, which he generated himself for the set- not sure which is correct)
Owned by Jeff · Last Updated Sep 22, 2007