19. An apparatus, comprising: a mixer configured to mix input streams received from participants of a conference call and distribute mixed streams to the participants of the conference call, the mixer providing a first stream at a first volume to participants of the conference call having a sub-group meeting and providing a second stream at a second volume that is lower than the first volume to remaining participants of the conference call; and logic operatively coupled with the mixer, the logic detecting whether a participant of the remaining participants of the conference call uttered a predefined keyword, and the logic selectively issuing an alert to a participant in the sub-group meeting responsive to detecting the uttering of the predefined keyword, wherein the alert is played to the participant in the sub-group meeting at a third volume that is higher than the second volume.
20. The apparatus set forth in claim 19 , wherein the logic is a speech to text converter operatively coupled with the mixer.