Convolutional Neural Networks

Recurrent neural network for audio noise reduction

PainterEngine is a application/game engine with software renderer,PainterEngine can be transplanted to any platform that supports C

Arduino Audio Tools (a powerful Audio library not only for Arduino)

You can find the speech algorithms you want here

A cross-platform framework for developing spatial audio algorithms and software in C/C++

Sound Open Firmware

PESQ (Perceptual Evaluation of Speech Quality) Wrapper for Python Users (narrow band and wide band)

Algorithms for sound filters, like reverb, dynamic range compression, lowpass, highpass, notch, etc

A lightweight, high-performance Kalman Filter library in C, C++, and MATLAB, offering superior numerical stability and efficiency with minimal dependencies.

RNNOISE Noise elimination, MCRA noise estimation, OMLSA post filtering

The simplest way to demix stereo content with decent quality and low latency.