audio restoration notebook
the Louis Armstrong project
|Louis Armstrong Commercial Ad Lib/Rehearsal With His Swinging Band!|
The two known existing 10 inch copies of this studio session came in to the facilities here at VINYLRECORDSTOCD.COM with neither having been cared for very well in the 40 some years since their cutting on the studio's vinyl lathe. They were sandwiched one on top of the other in a cardboard container with a third non-descript disc molding away. Normally in a situation like this, and, given only one copy of the record, I would have tracked in to the computer prior to cleaning to make a safety copy, lest something go awry in the cleaning process. But with two copies to use, I cleaned one using my special process, and then input to the computer using a high bit rate and bandwidth. Unfortunately, but not surprisingly, considering the condition of the vinyl, the record skipped. The second 10 inch disc was put through its cleaning and input paces, only to find that it, too, had a skip, albeit in a different place. Surface and impulse noises were pretty prevalent, as was some 60hz hum introduced in the master cutting process.
|Louis Armstrong Commercial For Suzy Cute|
I was able to edit the two records together to make one digital file which I then processed in 4 separate steps. Some noticeable clicks and pops remained. I resisted any more software processing to avoid altering the character of the audio with the introduction of quantization errors and digital processing artifacts, and elected instead to interpolate the remaining impulse noises by hand, redrawing the wave form in the places where these noises were most pronounced.
For a less flattering take on Armstrong's pimping the child's toy, check this blog spot here