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LAV Audio | 1f0.de – open-source in a closed world
https://1f0.de/lav-audio/
LAV Audio is a multi-format audio decoder for DirectShow. It is based on ffmpeg and its main goal is to offer audio quality without compromise. This means that no shortcuts have been used, no corners cut, everything is setup for the best quality possible. Supported Formats Officially, following formats are supported:
Guide: Setting Up LAV Filters + MPC HC For All Your ...
http://www.mediasmartserver.net/2011/06/30/guide-setting-up-lav-filters-mpc-hc-for-all-your-splitter-and-audio-needs/
Open up MPC HC and under View -> Options go to Internal Filters and ensure that any Source Filters you want LAV used for are unchecked (so for my test I made sure Matroska and MPEG PS/TS/PVA were unchecked) Next up go to Options -> External Filters and add “LAV Splitter”, “LAV Splitter Source”, and “LAV Audio Decoder”, setting them as Prefer.
What is LPCM - Linear Pulse Code Modulated Audio
https://www.appgeeker.com/audio/what-is-lpcm.html
LPCM (acronym for Linear Pulse Code Modulation) is uncompressed audio encoding which employs a combination of values like sample sizes, sample rate, number of channels, etc. LPCM is referred to as PCM Plus. As a particular kind of PCM, LPCM's quantization levels are linearly uniform, using PCM with linear quantization.
Correct PCM/Dolby modes and LAV filters on my ... - AVS Forum
https://www.avsforum.com/threads/correct-pcm-dolby-modes-and-lav-filters-on-my-receiver.2848914/
Dolby and DTS are both special "languages" of digital audio coding. At some point in the process of playing the file you need to decode them to PCM (sometimes used interchangeably with LPCM). You CAN do it at the PC and send a PCM signal to the receiver, or you can use LAV filters and send DD/DTS to the receiver (which is more common).
LAV Filters Version History - VideoHelp
https://www.videohelp.com/software/LAV-Filters/version-history
LAV Audio - Added the ability to use the ArcSoft DTS decoder directly through LAV Audio - Added an automatic algorithm to keep A/V sync stable - Improved Bitstreaming with splitters other then LAV Splitter - Improved timestamp generation when bitstreaming - Fixed LPCM 24-bit Media Types 0.25 - 2011/05/06 LAV Splitter
How to config ffdshow/LAV and reclock for HD audio ...
https://forum.doom9.org/showthread.php?t=152520
Uncompressed LPCM: this is the pure audio uncompressed. Lossless FLAC, THD and DTSHD-MA: Those are similar to zipped uncompreesed audio; there is no loss when they are unzipped. Those are lossless HD formats. Lossy DD+ and DTSHD-HR: those are lossy compressed HD audio formats. Lossy DD and DTS: those are compressed SD audio formats. …
LAV Filters - DirectShow Media Splitter and Decoders ...
https://forum.doom9.net/showthread.php?p=1919436
I have an MKV with what it claims to be stereo LPCM audio. In reality, it's mono LPCM. During playback with JRiver set to use LAV Audio for bitstreaming, I indeed get one channel. However, it's only coming out of the left front speaker. I'm not entirely sure if it's a consequence of how it was ripped to MKV (this is the Bruce Lee blu-ray ...
Verify TrueHD via LAV - But Zoom Player volume attenuation ...
https://forum.inmatrix.com/index.php?showtopic=15339
It does sound as if LAV is not able to negotiate with your "device" to accept the bitstream untouched, and that it is outputting LPCM to your device (hence the lack of the word "bitstream" and the animated volume levels. Stupid question, but I assume you have all the Bitstreaming check-boxes ticked in the LAV Audio Settings.
Conclusion of Converting DTS-HD MA, TrueHD, LPCM to FLAC
https://losen.win/articles/convert-dts-hd-ma-truehd-lpcm-to-flac-is-it-worth-it/conclusion-of-converting-dts-hd-ma-truehd-lpcm-to-flac.html
For each 1,000 gigabytes of compressing DTS-HD MA / TrueHD / LPCM to FLAC you will save 20 / 10 / 100 gigs accordingly. For the most popular Blu-ray HD-audio formats like DTS-HD Master Audio and Dolby TrueHD the difference is almost none and equals only 2% or 1%. The main reason is that both of the codecs are already efficiently compressed.
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