In most cases, the AV receiver usually does the decoding process.Īn AV receiver has built-in decoders to read the data stream sent from your DVD player, Blu-ray player, game console or TV. This is so you will never be in a situation where you cannot hear the sound from a disc you buy – which must be a good thing!įor more detailed information on all these codecs, go to the article on understanding Blu-ray audio codecs. The main soundtrack on a DVD or Blu-ray disc will always be a mandatory audio type that all hardware will support. If your hardware doesn’t support decoding a particular audio format, you won’t be able to play that version of the soundtrack. Very simply, audio decoding is the process of reading the digital data and turning it into audio that you can hear. The critical thing to understand is that these are the encoded formats, and something needs to decode this audio before you can hear it. But if you look at the back of the box, you will see which soundtracks are available for that disc. You won’t find all these formats on every Blu-ray disc. These aren’t actually codecs – they are object-based data streams added on top of the codecs listed above.
With the new Ultra HD Blu-ray specification, there are two new optional audio formats: For Blu-ray discs, there are seven supported codecs:
Once you get this straight, the subject becomes much clearer.Īudio encoding is the method that stores the audio on a DVD or Blu-ray disc. When discussing AV receiver listening modes, you need to be clear about the difference between audio encoding and decoding. However, whatever the term used, all AV receivers will have presets you can use to make the audio work best for your system. Not all AV receiver brands use the term ‘listening mode.’ Here is a list of the terms used by some of the more popular brands: The main point is that you decide how you want to hear the audio in your room by enabling these listening modes. Or, it may play the soundtrack over a larger speaker layout than initially designed for – or downmix surround sound to stereo. Or, it may enable internal processing, which alters how your system plays the audio.įor example, it may add an effect that makes it sound like you are in a large theater space. It may tell the receiver to play the audio exactly as recorded on the disc.
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