There are 2 de facto consumer standards in Digital Audio:

• Hi end. 96kHz. FLAC - lossless codec with average compression rate 1.5x

• Lo end. CD (44.1 kHz) and MP3/AAC (48 kHz) - lossy codec, with average compression rate 10x

 

Spiral-Signal audio codec prototype works in uncovered by lossy codecs area of 96kHz (96, 192) and offers both:

• a) nearly lossless quality (over -90 dB)

• b) Conversion rate starts from 2.5x

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Files to compare based on sample track "Lucky 88": original FLAC format and Spiral Signal processed wav format

• Original lossless FLAC (conversion 1.5x): 

  • https://drive.google.com/open?id=1Pbl-BKWzVcQ3k1Jd7Ac3Z2BhSTveX2bH

• Spiral Signal (conversion 2.5x): 

  • https://drive.google.com/open?id=1E3PMN65gBuTf_AsIZU_DiW5nihVe4LEY

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Lucky 88 spiral-signal.wav quality characteristics:
  SampleRate: 96000
  SamplesCount: 18339840
  Seconds: 96
  peak diff value: 3.03984e-05; -90.343 db
  average diff value: 1.80872e-07; -134.853 db

 

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