Doppler simulates a "sound at a distance".

Mono converts the wrapped Streamer to a mono buffer by downmixing the left and right channels together.

Swap swaps the left and right channel of the wrapped Streamer.

Gain amplifies the wrapped Streamer.

Pan balances the wrapped Streamer between the left and the right channel.

Volume adjusts the volume of the wrapped Streamer in a human-natural way.