An audio mastering processing chain typically includes EQ, compression, stereo enhancement, limiting, and loudness normalization. These tools are used to improve the balance of a mix so that it translates properly on different playback systems. To achieve this balance, we use: Equalization: Adjust the balance of frequencies in the mix to create a more cohesive sound. Compression: Control the dynamic range of the audio by reducing the difference between the loudest and softest parts. Limiting: Increase the overall loudness of the audio by preventing clipping and distortion. Stereo enhancement: Widening the stereo image to create a more spacious sound. Loudness normalization: Adjust the overall loudness of the audio to \\"industry standards\\", A.K.A. as loud as any other similar songs on Spotify. Note that the order of processing steps can change depending on the audio engineer and the material. And sometimes the order of the steps can be changed depending on the desired result.