Detail

scope note
Discs issued at 16, 33 1/3, and 45 rpm are usually issued as microgroove. Cylinders issued at 160 rpm (which have 200 grooves per inch) are usually issued as fine.
English
Published

Other Properties

English preferred label microgroove/fine Published
English notation m Published
English definition Microgroove disc or a fine cylinder. Published
English scope note Discs issued at 16, 33 1/3, and 45 rpm are usually issued as microgroove. Cylinders issued at 160 rpm (which have 200 grooves per inch) are usually issued as fine. Published