Abstract: Buffer rate control generally relates to outputting data at either a first rate or a second rate responsive to a fill level of the buffer. In an apparatus therefore, there is a buffer for receiving a data-signal input and for providing a data-signal output. A controller is coupled to receive fill-level information from the buffer and coupled to provide rate-control information to the buffer. The rate-control information is for controlling an output rate of the buffer for the data-signal output to be provided to a bus. The output rate is either a first rate or a second rate for providing the output rate of the data-signal output to the bus. The fill-level information is for selecting either the first rate or the second rate responsive to the buffer being either above or below a threshold fill level, respectively.