Compression is used in mastering to reduce the difference between the loudest and quietest parts of the audio, creating a more consistent and controlled sound.

Tube compressors are not as commonly used in mastering as the other types mentioned, as they tend to introduce more distortion and coloration to the sound.

Limiters are used in mastering to prevent the audio from exceeding a certain threshold, which can cause distortion and unwanted artifacts.

Multi-band limiters are not as commonly used in mastering as the other types mentioned, as they are more complex to set up and can introduce unwanted artifacts if not used properly.

Compressors and limiters are both used to control the dynamics of an audio signal, but they serve different purposes. Compressors reduce the difference between the loudest and quietest parts of the audio, while limiters prevent the audio from exceeding a certain threshold.

A ratio of 2:1 is a good starting point for compression in mastering, as it provides a moderate amount of gain reduction without significantly altering the overall dynamics of the audio.

An attack time of 10 ms is a good starting point for compression in mastering, as it allows the transients of the audio to pass through relatively unaffected while still providing enough gain reduction to control the dynamics.

A release time of 100 ms is a good starting point for compression in mastering, as it allows the compressor to respond quickly to changes in the audio dynamics while still providing a smooth and natural sound.

A threshold setting of -6 dB is a good starting point for limiting in mastering, as it provides enough headroom to prevent clipping while still allowing the audio to reach a high level of loudness.

An attack time of 0.1 ms is a good starting point for limiting in mastering, as it allows the limiter to respond very quickly to any peaks in the audio signal and prevent them from clipping.

A release time of 10 ms is a good starting point for limiting in mastering, as it allows the limiter to release quickly enough to prevent any unwanted pumping or distortion, while still providing enough gain reduction to control the dynamics.

Compressors and limiters are both used to control the dynamics of an audio signal, but they serve different purposes. Compressors reduce the difference between the loudest and quietest parts of the audio, while limiters prevent the audio from exceeding a certain threshold.

A ratio of 2:1 is a good starting point for compression in mastering, as it provides a moderate amount of gain reduction without significantly altering the overall dynamics of the audio.

An attack time of 10 ms is a good starting point for compression in mastering, as it allows the transients of the audio to pass through relatively unaffected while still providing enough gain reduction to control the dynamics.

A release time of 100 ms is a good starting point for compression in mastering, as it allows the compressor to respond quickly to changes in the audio dynamics while still providing a smooth and natural sound.