rgelen 9th May 2019 | | 78 RPMLes Reed Combo - Spanish Armada / Madrid | Several of the major music publishers (in the UK at least) had recorded music libraries such as this for use in broadcast, film, newsreel and other applications. The records were sent out, or were available, to potential users who would incorporate the audio direct from the disc into their production - so as a result the discs had to be of the highest quality. Standard agreed royalty rates ensured that the producer always knew how much it would cost to use the music.
The quality of a disc recording is governed by a number of parameters, two of which are the speed and the surface noise.
The higher the speed (within reason), the better the quality, particularly at the HF end. So 78s should be capable of very good quality. However, the traditional material for making 78s was shellac, which is quite noisy and also quite fragile. So when vinyl "microgroove" LP records and 45rpm singles came along in the late 1950s, some of these libraries decided to use the new low-noise vinyl for their music library discs, but kept the speed at 78rpm for the highest possible quality. These discs were often 10in diameter with one (or sometimes two) tracks on each side.
Several libraries including Boosey & Hawkes and Francis, Day & Hunter (FD&H) used this technique, and this is one example.
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