Mac OS X Softwares to Multi-channel Support

Soundflower is a macOS audio system extension that enables applications to route audio directly between each other, acting as a virtual audio cable. It facilitates complex audio setups for recording, streaming, and mixing, bridging the gap between applications that cannot natively share audio streams.

JACK Audio Connection Kit is a versatile real-time audio server that facilitates ultra-low latency connections and seamless routing of audio and MIDI data between compatible applications on your operating system.

Vorbis is a free, open-source audio compression format spearheaded by the Xiph.Org Foundation. Renowned for its high-quality audio performance and efficient compression, it serves as a viable, patent-unencumbered alternative to proprietary codecs.