The course aims at the acquisition of basic concepts and skills in the field of musical and multimedia audio signals processing and streaming over the Internet. These skills enable an understanding of how audio and video processing software (for example, Audacity and OBS) and well-known streaming services (for example, Spotify, YouTube, Twitch) work. Thanks to a didactic approach based on learning-by-doing and problem-solving, the topics will be addressed without requiring specific prerequisites in terms of sectorial skills. Examples of practical activities include: the use of simple plugins for equalization and filtering of audio signals; inspection of the traffic generated by the request to listen to a musical audio/watch a video made via browser; comparison between video streaming, video conferencing, and networked music performance applications in terms of latency tolerance and resistance to packet loss.