AAC / Opus — Audio Codecs

What is it?

These are the two main ways live audio gets compressed:

• AAC: the universal standard for streaming sound — what almost every live platform, phone, and TV expects. The H.264 of audio.
• Opus: a newer, very efficient codec that sounds excellent even at tiny data sizes and handles real-time conversation brilliantly — it's what video calls and WebRTC use.

Practical example

A talk show runs on two layers at once: the host and remote guests talk to each other over WebRTC, where their voices travel as Opus (instant, clear, resilient to bad networks). The combined show is then broadcast to the audience with AAC audio, because that's what every viewer device plays without fuss.

Key things to know (non-technical)

• Rule of thumb: Opus inside the conversation, AAC out to the audience.
• Bad audio kills a stream faster than bad video — viewers forgive a soft picture, never a crackling voice.
• Audio uses a tiny fraction of the data video does, so there's little reason to skimp on its quality.
• Music streams need higher audio settings than talk streams.

In Tupic Live

Tupic Live's guest/co-host calls would naturally run on Opus, while the public broadcast ships AAC — and offering a "music mode" (higher audio quality preset) is an easy differentiator for performers and DJs.