P.C.M. stands for Pulse Code Modulation, which is a digital representation method used for transmitting analog audio signals. Some popular synonyms for this term include digital audio, uncompressed audio, and raw audio. Other related terms include analog-to-digital conversion, sampling, and quantization. P.C.M. is a crucial component in modern digital audio technology and has revolutionized the way we record and transmit sound. With the advent of high-quality, lossless audio formats like FLAC and ALAC, P.C.M. has become even more important. Regardless of the terminology used, the ability to accurately represent and transmit audio signals is crucial for modern audio production and distribution.