R2r Play Opus -

Users can also purchase specific libraries that run exclusively on the OPUS engine.

: In the context of audio equipment, particularly DACs (Digital-to-Analog Converters) and amplifiers, "R2R" stands for Rail-to-Rail. This term usually refers to the output stage of an amplifier that can drive the output voltage to within millivolts of the supply rails. Chord Electronics, a UK-based company, is known for its high-end audio equipment, including DACs and amplifiers. r2r play opus