Playback of a tagged audio stream at a user's computer can be controlled using a first media player. When the first media player detects a tag in the tagged audio stream, it mutes the volume of the first media player, and transfers playback control to a second media player operating at the same computer. The second media player controls playback of untagged media content, and in response to detecting completion of the untagged media content, returns playback control to the first media player. In this way, multiple media players in a client device can control the playback of audio content and the insertion of spots into that content.