Performance Under Different Bluetooth Codecs
Audition Pro / AS9P supports aptX Low Latency as well as other Bluetooth audio formats.
When working with different type of Bluetooth devices (Cellphone, TV, Tablet, PC, Transmitter, etc.), the operation codecs are different, depending on what codec the transmitter side supports.
Audition Pro / AS9P works under aptX Low Latency mode ONLY when the transmitter also supports aptX Low Latency. (Make sure to use only CERTIFIED aptX Low Latency products. https://www.aptx.com/aptx-low-latency)
You can easily identify the transmission audio codec by looking at the LED indicator when Audition pro is working, as table below.
| Connected with aptX Low Latency codec | Flash WHITE twice every 7s |  |
| Connected with aptX codec | Flash WHITE once every 7s |  |
| Connected with SBC codec | Flash BLUE once every 7s |  |
Audio delay when paired with different Audio device/transmitter-
| Audio source device or transmitter support- | The audio delay will be |
| aptX Low Latency codec | ~ 40ms |
| aptX codec | ~ 70ms |
| Fast Stream codec (Not supported by Audition Pro) | ~ 40ms |
| AAC codec (Not supported by Audition Pro) | ~120ms |
| SBC codec (most standard Bluetooth audio) | ~ 220ms |
Note: Audio delay for Fast stream codec is almost the same as aptX LOW Latency codec, but the audio quality of the aptX LOW Latency codec is much better.
Bluetooth Audio Delay Experiment - aptX Low Latency vs others
https://www.youtube.com/watch?v=4_bypcPW5O4&feature=youtu.be
