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int24 conversion
- https://stackoverflow.com/questions/7416699/how-to-define-24bit-data-type-in-c
- https://stackoverflow.com/questions/3345553/how-do-you-convert-3-bytes-into-a-24-bit-number-in-c
- https://stackoverflow.com/questions/3322788/best-practice-for-converting-24bit-little-endian-twos-complement-values-to-in
- https://stackoverflow.com/questions/3783677/how-to-read-integers-from-a-file-that-are-24bit-and-little-endian-using-python
- https://www.mathworks.com/matlabcentral/answers/133547-how-to-convert-a-24-bit-two-s-complement-value-into-a-signed-integer