All algorithms for <answer>MPEG-1</answer> Audio Layer I, II and III were approved in 1991 and finalized in 1992 as part of <answer>MPEG-1</answer>, the first standard suite by MPEG, which resulted in the international standard ISO/IEC 11172-3 (a.k.a. <answer>MPEG-1</answer> Audio or <answer>MPEG-1</answer> Part 3), published in 1993.
What was the first started suite by MPEG?
MPEG-1