This week, we take you “under the hood” of a restoration job so you can see some of the work that goes into making an ancient record sound newish.
The specimen of our efforts: Blue Amberol 2057, “One Fine Day” from Puccini’s Madame Butterfly, by Agnes Kimball. This was recorded in 1912 and released on wax Amberol 1007 and then made into a Blue Amberol and re-released in November 1913. The cylinder is in very good shape, it’s loud and clear, but there’s one problem: it has an abrasion that goes lengthwise all the way across the grooves. This results in an obtrusive “swish” sounding prominently above the vocal and music once per revolution from start to finish.
There are a few ways we could deal with this. One would be to try to dull the sound a little bit and hope the listener will forgive the imperfection. Another way is to reduce, if not eliminate, the problem with some precise surgery. This is what we’ll do, since the rest of the record’s surface is so clean; we want this restoration to sound as clear as possible.