A Portastudio is a type of recording device that can record multiple audio tracks at once. It works by taking sound from a microphone, instrument, or other sound source, and recording it onto a small tape that you can put inside the portastudio. You can then add additional sounds to the recording and create a multi-track recording where you can mix and match different recordings together. The portastudio was the first affordable device that allowed people to record music in their home or studio without needing to hire a professional recording studio.