In one embodiment, a satellite radio receiver is capable of simultaneously processing (i) a first radio channel that is playing on a first speaker and (ii) a second radio channel, different from the first radio channel, that is not playing on the first speaker. The second radio channel can simultaneously be playing on a second speaker, be recorded onto a non-volatile memory, and/or have its processing modified. A user can control the satellite radio receiver using vocal commands, while the first channel is playing on the first speaker. The radio receiver has a microphone connected to a voice-recognition command interpreter that includes an interfering-sound canceller, which reduces sounds interfering with the vocal commands, and a command-recognition module, which recognizes vocal commands and provides a control signal to a multi-channel control processor, which processes and controls the first and second radio channels, received from corresponding decoders connected to a satellite radio receiver antenna.