OpenDSP is an optimised for ARM toolbox library for audio digital signal processing. It features filtering and dynamic processing implementations.
Full floating-point operation, optimised with the NEON instruction set whenever possible.
Every coefficients are computed dynamically, no LUTs are used.
IIR Filter with analog based filters approximated with the bilinear transform. All filters types (HPF, LPF, BPF) are supported, 1st and 2nd order. There also is an implementation of an IIR Peak filter.
Support for custom arbitrary transfer-function dynamics processing. Based on an ASR envelope, support down to the ms tuning of attack, hold and release.