FSLAC ~ Free Semi-Lossless Audio Codec


constrained VBR (CVBR) version of the publicly available open-source lossless audio coder FLAC.

FLAC, being a mathematically lossless audio codec, inevitably creates VBR streams as compressed files. Depending on the «difficulty» of coding each segment of the audio signal, the instantaneous coding bit-rate can be quite high. However, one can observe that, during passages of high FLAC bit-rate, the coded audio also exhibits the greatest ability of psychoacoustic masking. FSLAC exploits this property to limit the maximum instantaneous bit-rate of the compressed file. It does so by detecting the difficult audio blocks (by measuring their predictability via linear-prediction error energy calculations) and requantizing each of the detected blocks to a lower bit-depth, thereby reducing the bit-rate needed for lossless coding of that block. To prevent the quantization error from becoming audible (or visible in a spectrogram), simple adaptive noise shaping is used.

This approach is similar to the one used by LossyWAV, but differs in two important aspects. First, FSLAC is not a stand-alone pre-processor but instead is coupled with a FLAC encoder and, hence, directly creates FLAC compatible compressed files. Second, FSLAC only alters the high-bit-rate audio segments, not (almost) all parts of the audio input as LossyWAV does. The coded audio, therefore, remains perceptually lossless. In addition, it is worth noting that, due to its simplicity, FSLAC encoding is very fast. All of these features make FSLAC attractive for audio production and archival applications.

www.ecodis.de/audio.htm#fslac
hydrogenaud.io/index.php?topic=122390

eac3to ~ Audio Conversion Tool


eac3to is able to convert E-AC3, TrueHD, PCM and DTS-HD audio tracks to AC3, DTS or FLAC. Converts E-AC3, TrueHD, PCM, DTS-HD and FLAC tracks to AC3 / DTS / FLAC. Removes Dialog Normalization from AC3, E-AC3, DTS and TrueHD tracks. Extracts AC3 frames from Blu-Ray AC3/TrueHD tracks. Extracts DTS core from DTS-HD tracks. Can remux the video track of a EVO / VOB source to Matroska (mkv). Command line tool but GUI (UsEac3to) also available. Requires external audio decoders.

forum.doom9.org/showthread.php?t=125966

Alternative Graphical User Interface (GUI):

forum.doom9.org/showthread.php?t=135095 ~ More GUI

References:

en.m.wikibooks.org/wiki/Eac3to
en.m.wikibooks.org/wiki/Eac3to/How_to_Use

Pine Player ~ MacOS HQ Up Sampling Max 32bit 768kHz


Pine Player is an exclusive listening digital music player for music lovers who use the OSX operating system. It can play almost all existing digital audio forms such as MP3, FLAC, APE, AAC, M4A, WAV, AIFF, OGG, WMA, DSD, SACD ISO etc. and it also has a strong playing capability for listening to CUE files in the most convenient way.

1.     Maximum 32Bit 768kHz Up Sampling Function

Pine Player supports various kinds of PCM formats, so it can play sound sources from 16 to 32 bit; it can also reproduce clear and abundant sound quality by supporting a maximum of 768kHz.

Pine Player’s unique Over Sampling Filter is a technique that upconverts an ordinary MP3 file into a 32bit, maximum of 768kHz, and high sound quality sound source and sends it to the DAC for it to be played in best performance. Ordinary MP3 files’ sound quality can actually be heard more clearly and plentifully. Obviously, HD audio files such as MQS and DSD can be upconverted to a maximum of 768kHz as well.

2.     Convenient and Strong Playlist & Prevention of Text Cracking

Pine Player has a very convenient playlist because users can save and manage the music they wish to listen to, change the order of the music being played by simply dragging, and express any kind of language or text encoding perfectly because of its flawless decoding function. There is no Korean code cracking.

3.     Cross Fade and Gapless set-up

Cross Fade function, which is a technique that decreases the gap between songs when listening to files on the playlist or overlaps the songs for no gaps at all, can be set into seconds.

4.     Mass Storage of Audio Queue for Real Time Converting

Pine Player prevents damage of sound quality by having a high-powered Audio Queue for processing excessive amount of digital data. Therefore, it takes a considerable amount of memory compared to other music players.

5.     Automatic Isolation of Damaged Sound Sources

Pine Player has an automatic isolation function for damaged sound sources called Vault. If a damaged sound source is detected while playing the music, the music is stopped and taken to the Vault file for isolation. Through this convenient function, users can easily figure out which sound source is damaged and restore it.

Even with all these functions, Pine Player is a free app. Moreover, there are not any marketing or advertising material. Especially, no information including personal ones are sent to the outside or the Internet.

www.digipine.com/index.php?mid=pineplayer

FiiO Music App ~ Hi Rez Audio For Android & iPhones


FiiO Music App is designed to maximize the experience of music lovers. Download the FiiO Music app today to start your journey to rediscover your music!

www.fiio.com/app

unflac ~ Command Line FLAC Splitter


A command line tool for fast frame accurate audio image + cue sheet splitting.

This project is started mostly out of frustration over supporting split2flac with all the external dependencies and their quirks.

git.sr.ht/~ft/unflac

split2flac ~ POSIX FLAC Splitter


split2flac splits one big APE/FLAC/TTA/WV/WAV audio image (or a collection of such files, recursively) with CUE sheet into FLAC/M4A/MP3/OGG_VORBIS/OPUS/WAV tracks with tagging, renaming, charset conversion of cue sheet, album cover images. It also uses configuration file, so no need to pass a lot of arguments every time, only an input file. Should work in any POSIX-compliant shell.

https://github.com/ftrvxmtrx/split2flac

Lossless Audio Checker ~ Truly Lossless Or Not


Internet music dealers currently sell “CD-Quality” tracks, or even better (“Studio-Master”), thanks to lossless audio coding formats (FLAC, ALAC). However, a lossless format does not guarantee that the audio content is what it seems to be. The audio signal may have been upscaled (increasing the resolution), upsampled (increasing the sampling rate) or even transcoded from a lossy to a lossless format. Lossless Audio Checker analyzes lossless audio tracks and detects upscaling, upsampling and transcoding.

losslessaudiochecker.com

FLAC Frontend ~ Lossless Encoding GUI


FLAC Frontend is a convenient way for Windows users not used to working with command lines to use the official FLAC tools. It accepts WAVE, W64, AIFF and RAW files for encoding and outputs FLAC or OGG-FLAC files. It is able to decode FLAC files, test them, fingerprint them and re-encode them. It has drag-and-drop support too. It is tested on Windows XP SP3 and Windows 7, but should work with Windows XP SP2 or newer. It requires .NET 2.0 or later.

sourceforge.net/projects/flacfrontend