14.Apr.2025
RastPort
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Tool: Audio decompression with QoaToAiff 0.1
The relatively new "Quite OK Audio Format" (QOA) is a lossy audio compression format: audio signals (44100hz, stereo) are encoded at 278 kbits/s, or more precisely at 3.2 bits per sample - exactly 1/5 of the bits required for an uncompressed WAV file. It is therefore less complex than the well-known OGG Vorbis and MP3 formats, but still significantly smaller than lossless file formats (see also a corresponding German (siehe auch einen entsprechenden heise.de article).
According to Grzegorz Kraszewski, this could also be a good alternative for the Amiga in terms of computing effort, quality and file size. He has implemented a decoder in M68k assembler and written a tool that converts QOA files into uncompressed AIFF (source code on GitHub). The author points out that this version is not yet optimised and does not use 68020+ instructions. (dr)
[News message: 14. Apr. 2025, 06:23] [Comments: 0]
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