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There is currently one usage of "an" prior to "PCM". The indefinite article usage prior to an acronym is determined by the pronunciation of that acronym's first letter. If the pronunciation starts with a consonant, "a" is used. If the pronunciation starts with a vowel, "an" is used. Usage https://en.wikipedia.org/wiki/Pulse-code_modulation Note that there is currently a correct usage in the same file on a different line: "a PCM header" Change-Id: Id7749d20722a5cc9b96ecfe466be66fe3c76ab2b Reviewed-on: https://go-review.googlesource.com/12083 Reviewed-by: David Crawshaw <crawshaw@golang.org>
golang.org/x/mobile/exp contains experimental packages for mobile app development.