*VIDC*

This is the native sample format for the sound system on the Archimedes and hence supported by many RISC OS file formats. Is is basically the same as µ-law except the byte is rotated one bit to the left so that the sign is in bit 0 instead of bit 7. This makes volume attenuation simpler in high-efficiency sound engines. The 7-bit magnitude is a value companded from an 11-bit linear value. Hence the sample as a whole has a 12-bit dynamic range.

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