Audio guide
Audio Bitrate Explained for Game and Web Audio
Understand audio bitrate and choose it from listening tests instead of a single universal number.
What bitrate changes
For a lossy audio format, bitrate is the amount of data allocated per second. A higher bitrate generally preserves more detail and creates a larger file. A lower bitrate creates a smaller file but can make artifacts more noticeable, especially in cymbals, ambience and speech.
Bitrate is not meaningful in isolation. Channel count, sample rate, codec and source complexity all influence the result. Compare exports made from the same source before selecting a delivery setting.
Pick a setting with a short test
Export a few candidates and listen on the device or in the engine that players will use. Include quiet passages, busy music and any looping effects. If a smaller file sounds indistinguishable in context, it may be the better delivery choice.
Keep the original source. You can make a new bitrate export later, while repeatedly re-encoding a lossy file compounds quality loss.