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+ Secret Rabbit Code (aka libsamplerate) is a + Sample Rate Converter for audio. + One example of where such a thing would be useful is converting audio + from the CD sample rate of 44.1kHz to the 48kHz sample rate used by + DAT players. + + ++ SRC is capable of arbitrary and time varying conversions ; from + downsampling by a factor of 256 to upsampling by the same factor. + Arbitrary in this case means that the ratio of input and output + sample rates can be an irrational number. + The conversion ratio can also vary with time for speeding up and slowing + down effects. + + ++ SRC provides a small set of converters to allow quality to + be traded off against computation cost. + The current best converter provides a signal-to-noise ratio of 145dB + with -3dB passband extending from DC to 96% of the theoretical + best bandwidth for a given pair of input and output sample rates. + + ++ Since the library has few dependencies beyond that provided by the + standard C library, it should compile and work on just about any + operating system. + It is known to work on Linux, MacOSX, + Win32 + and Solaris. + With some relatively minor hacking it should also be relatively easy + to port it to embedded systems and digital signal processors. + + ++ In addition, the library comes with a comprehensive test suite which + can validate the performance of the library on new platforms. + + + + + + + |