An audio processing apparatus connectable to a video processing apparatus and capable of processing audio signals, the audio processing apparatus comprising: a plurality of inputs, for connecting respectively to a plurality of input sources (4,5) to receive from each input source an audio signal to be processed by the audio processing apparatus, and a video signal corresponding to the audio signal and to be processed by the video processing apparatus; selection means configured to select an input source from the plurality of input sources; video signal transmission means (8, 13) for transmitting the corresponding video signal from the selected input source (4, 5) to the video processing apparatus; and delay means configured to delay said audio signal received at said input; characterised by: control means configured to transmit to the connected video processing apparatus device-type information relating to a type of device serving as the input source selected by the selection means, the device type being independent of a type of video signal received from the device concerned and being capable of distinguishing a DVD player from a games console, which device-type information is contained in a control signal received from the selected input source, and also configured to receive from the video processing apparatus predetermined delay time data read by the video processing apparatus from a memory taking into account the type of device and the type of video signal and an image quality setting made by a user, and to cause said delay means to delay said audio signal based on the delay time data. a plurality of inputs, for connecting respectively to a plurality of input sources (4,5) to receive from each input source an audio signal to be processed by the audio processing apparatus, and a video signal corresponding to the audio signal and to be processed by the video processing apparatus; selection means configured to select an input source from the plurality of input sources; video signal transmission means (8, 13) for transmitting the corresponding video signal from the selected input source (4, 5) to the video processing apparatus; and delay means configured to delay said audio signal received at said input; characterised by: control means configured to transmit to the connected video processing apparatus device-type information relating to a type of device serving as the input source selected by the selection means, the device type being independent of a type of video signal received from the device concerned and being capable of distinguishing a DVD player from a games console, which device-type information is contained in a control signal received from the selected input source, and also configured to receive from the video processing apparatus predetermined delay time data read by the video processing apparatus from a memory taking into account the type of device and the type of video signal and an image quality setting made by a user, and to cause said delay means to delay said audio signal based on the delay time data. control means configured to transmit to the connected video processing apparatus device-type information relating to a type of device serving as the input source selected by the selection means, the device type being independent of a type of video signal received from the device concerned and being capable of distinguishing a DVD player from a games console, which device-type information is contained in a control signal received from the selected input source, and also configured to receive from the video processing apparatus predetermined delay time data read by the video processing apparatus from a memory taking into account the type of device and the type of video signal and an image quality setting made by a user, and to cause said delay means to delay said audio signal based on the delay time data.