We know that Bluetooth maximum bitrate is 2Mbps and it can only reach 1 or 2Mbps in perfect condition. The bitrate of an audio file in 48kHz and 24bit is 2.304Mbps before packing. Therefore, in order for stable connection and audio transmission, when using Bluetooth to wirelessly transmit audio, audio signal needs to be compressed by a certain algorithm. That’s so called codec. There are many different Bluetooth codec because of the continuous development of technology and unstop pursue of high audio quality, such as SBC, AAC, aptX, aptX HD, LDAC and so on. Different codec would have impacts mainly on audio quality as frequency response, THD, and audio transmission as stability, range and latency.
In this video, we use WONDOM AA-AB41136 Bluetooth receiver board to test the impact of different codecs in frequency response. The involved codec is SBC, AAC, aptX and aptX HD.
If you’re interested in this video, please leave us a like or a comment. We will upload more videos on comparisons among Bluetooth codecs (SBC, AAC, aptX, aptX HD, aptX LL, LDAC) according to your feedbacks.
We are going to provide the final comparison chart when all tests done, include Delay, THD and transmission quality, leave us your comments and let us know what you would like to know, and let us check the conclusion together! Cheers!
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