DSD (Direct-Stream Digital) is the trademark name used by Sony and Philips for their system of digitally recreating audible signals for the SACD (Super Audio CD). SACD audio is stored in DSD, which differs from the conventional PCM used by the compact disc or conventional computer audio systems. SACD’s use a single-bit values at a sampling rate of 2.8224 MHz (64 times the CD Audio sampling rate of 44.1 kHz)
VISION DSD likes to host DSD 5.6448 MHz (128 times the CD Audio sampling rate of 44.1 kHz) also known as Double-rate DSD or DSD128.
FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio. Digital audio compressed by FLAC's algorithm can typically be reduced to 50–60% of its original size and decompressed to an identical copy of the original audio data.
FLAC is an open format with royalty-free licensing and a reference implementation which is free software. FLAC has support for metadata tagging, album cover art, and fast seeking.
FLAC support in portable audio devices and dedicated audio systems is somewhat limited compared to lossy formats such as MP3 or uncompressed PCM, but FLAC is generally supported by more hardware devices than competing lossless compressed formats that may have intellectual property constraints.
For more info on DSD and FLAC search the web but more importantly, use your ears.
VISION DSD hosts DSD 5.6 MHz and 24 bit/192kHz FLAC files. Please write to contact@VISIONDSD.COM
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