Now for aptX HD, which is essentially an updated, beefed-up aptX with the ability to transfer music in a way that permits better sound quality. So as aptX can transmit more bandwidth than 'standard' Bluetooth codecs (SBC and AAC), it is designed to sound better than them.ĪptX has a compression ratio of 4:1 and a data rate of 352kbps. You can read all about how Bluetooth codecs work in our dedicated Bluetooth codecs explainer, but essentially the higher a codec's bitrate, the more 'bandwidth' it has, meaning the more efficiently it can carry higher-quality audio without losing information. Note that it is ‘CD-like’ and not actual ‘CD-quality’ because aptX uses compression (which helps to reduce audio-coding delays and minimise latency issues) and therefore, like every other Bluetooth codec out there, is not lossless. What’s the big deal about aptX? Its party trick is the ability to transmit music, full bandwidth, at a ‘CD-like’ 16-bit/44.1kHz. These days, Qualcomm's aptX is synonymous with Bluetooth, which you will find on plenty of computers, smartphones, AV receivers, and plenty of other consumer electronics products. ![]() Steven Spielberg was an early adopter, collaborating to use aptX to record audio for 5.1 digital playback for films including Jurassic Park in 1993, and later Schindler’s List and Saving Private Ryan. ![]() It is an audio-coding algorithm, created in the late 1980s, popular with film studios and radio broadcasters. ![]() To understand what aptX HD is, we need to discuss what ‘classic’ aptX is.
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