HighResolutionPCM

HighResolutionPCM is a term used to describe digital audio data encoded with a higher resolution PCM encoding than the traditional CD standard. PCM stands for pulse-code modulation and is the most common method for digitally representing analog audio. In high-resolution usage, PCM typically involves bit depths greater than 16 bits and sample rates above 44.1 kHz, with 24-bit/96 kHz and 24-bit/192 kHz being common examples.

Technical overview: The increased bit depth offers greater dynamic range and lower quantization noise, while higher sample rates can affect transient response and audible bandwidth. The theoretical dynamic range of 24-bit PCM is around 144 dB, but practical benefits depend on the entire signal chain, from capture to playback. Not all listening material or systems reveal a noticeable improvement, and the term is partly marketing in some contexts.

Formats and delivery: High-resolution PCM is typically stored in uncompressed containers such as WAV or AIFF, or in lossless containers like FLAC that decode to PCM. It is distinct from non-PCM high-resolution formats such as DSD. Copy protection and container compatibility can influence playback.

Applications and adoption: It is widely used in professional recording, mastering, and archival work, and is available in some consumer hi-fi setups and streaming services that offer high-resolution audio. Playback requires equipment capable of handling higher sample rates and bit depths, including suitable DACs and digital interfaces.