10. Logic encoded in a non-transitory tangible computer readable medium for execution by a processor, and when executed operable to: mix input streams received from participants of a conference call and distribute mixed streams to the participants, a first stream is provided at a first volume to participants of the conference call having a sub-group meeting and a second stream is provided at a second volume to remaining participants of the conference call; search selected input streams for a predefined keyword; and issue an alert to at least one participant in the sub-group meeting responsive to detecting the predefined keyword, wherein the predefined keyword detected in the second stream is played as the alert at a third volume that is higher than the second volume.
16. The logic set forth in claim 10 , wherein the second stream comprises the first stream; and wherein the second stream is provided at a lower volume than the first stream to participants of the sub-group meeting.