![]() On devices which support AAC but don't support AAC+, the audio will usually still play, but will be heard in mono. Parametric stereo splits audio up into a mono signal and an ultra low-bitrate side band that is used to create a convincing approximation of the original stereo signal. The result is significantly better audio quality at lower bitrates (64 kbps and lower).Īlso known as AAC+, HE-AAC v2 is another extension to AAC, which introduced a technique called "parametric stereo" to provide even higher quality at lower bitrates. It essentially fakes high frequency audio in a way that your brain can't hear anyway, and by doing so, allows it to "spend" more bits in the encoding of lower frequencies that are more noticeable. HE-AAC v1 uses a technique "spectral band replication", which discards high frequency audio before encoding, and then recreates those high frequencies during decoding using a psychoacoustic model. "High-Efficiency AAC" (HE-AAC) is an extension to the AAC format that provides better sound quality at lower bitrates, which makes it more optimized for streaming. The origin of the Ogg name comes from the jargon of a video game called Netrek. It was originally thought that the Ogg name was based on a character from Terry Pratchett’s Discworld novels, but the creators of the Ogg format say that isn’t the case. Today, it is widely supported in players and browsers as a streaming audio format, but generally still lags behind AAC in terms of quality and compatibility. Ogg Vorbis gained popularity in the early 2000s as it offered better sound quality than MP3 and WMA, but grew more slowly due to a lack of support in hardware players. It consists of an audio compression format called "Vorbis" and a container format called "Ogg". Ogg Vorbis was created as a patent-free open source codec as a response to MP3. (AAC is now sometimes referred to as Low Complexity AAC, or LC-AAC.) It is nearly universally supported across every device and web browser, and is an excellent choice for streaming radio because of the better sound quality when compared to MP3s. The format was created in 1997, but did not achieve widespread usage until Apple introduced AAC support in iTunes and began distributing iTunes Music Store downloads in AAC format. Today, MP3 as a streaming format is universally supported across effectively every device, and still offers relatively good sound quality due to improvements in encoders over the years.ĪAC is the successor to MP3, and offers higher accuracy, higher efficiency, and more samplerates than MP3. The quality achievable at standard bitrates (128 kbps) were also well below the download speeds of early broadband modems (1000 kbps), so the invention of the MP3 codec kickstarted the trend for internet radio and music downloading. It was the first codec that offered good sound quality with file sizes that were convenient at the time. ![]() MP3 is a compressed audio format that emerged in the mid-90s, and gained widespread usage as the format of choice for digital music. The Radio Mast Streaming Network is compatible with both MP3 and all AAC-type codecs. I would prefer smaller size, but not if that will compromise quality in any way! Also, encoding time doesn't matter at all, I prefer longer if it will mean gain in quality/size.Not all audio formats are created equal! Here is what you need to know about the history of streaming audio codecs, and choosing a format that suits your needs. If relevant for my case, I want to encode my FLAC collection into AAC, with best quality/size. Regarding the container/format I have no doubts, it'll be MP4/.m4a. What bitrate per channel do you reccommend to ensure transparency? I saw you mentioning 64 kbps per channel (128 kbps totally), but isn't this too low? Seems too good to be true :).Are all of them VBR? Why is it not possible to set bitrate with "Apple Lossless Audio Codec"? What is the bitrate in that case? Which codec to chose from: "MPEG AAC Low Complexity", "MPEG AAC High Efficiency" and "Apple Lossless Audio Codec".Supposing the answer is yes, I have a few questions regarding it's settings: Firstly, thank you so much for such a fantastic software! So simple, fast and unicode tags-preserving!īased on your reccommendation I replaced default FAAC with Apple Core AAC encoder in latest "freac-1.1-alpha-20181201a-圆4" by extracting and installing "AppleApplicationSupport64.msi" only, withot iTunes, and all went fine, now it's in the list.įirst, I would like to aks you if you still reccommend Core Audio Encoder as "the best there is"?
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