Crescendo

From Author Wars - https://authorwars.com/books/crescendo-95012.html

Overview:

Title: Crescendo
Author: Richard Matheson
Year: 1963
Type: Short Fiction

Variant Titles:

Editions/Publications:

Unknown. Fiends and Creatures (Unknown, Richard Matheson, Popular Library, $1.25, 190 pages, Paperback, Anthology)
Unknown. Gamma 1 (Unknown, Richard Matheson, Star Press, Inc., $0.50, 130 pages, digest, MAGAZINE)