melograph1
/ˈmɛləɡrɑːf/ /ˈmɛləɡraf/(also mélographe) Music. Now historical
noun
Any of several devices which automatically record the notes of the tune played on a pianoforte, harpsichord, or similar musical instrument.
Origin
Late 19th century; earliest use found in George Grove (1820–1900), writer on music and lexicographer. Partly from French mélographe and partly from its probable etymon German Melograph from melo- + -graph.
melograph2
/ˈmɛləɡrɑːf/ /ˈmɛləɡraf/noun
An electronic device which provides a continuous graphic record of melody, speech, etc., usually showing how pitch and loudness vary with time.
Origin
1960s; earliest use found in World of Music. From melo- + -graph.