1. A system comprising: a computer-readable memory storing executable instructions; and one or more processors in communication with the computer-readable memory, wherein the one or more processors are programmed by the executable instructions to at least: cause presentation of a first audio item, wherein the first audio item is associated with a first audio item type and with first metadata regarding arbitration of presentation conflicts with audio items of the first audio item type, and wherein the first metadata indicates a plurality of break points in the first audio item; obtain second metadata regarding arbitration of presentation conflicts with audio items of a second audio item type, wherein the second metadata specifies a default presentation for audio items of the second audio item type, and wherein the second metadata includes timing information for presentation of a second audio item associated with the second audio item type; determine, based at least partly on the first metadata and the second metadata, to present the second audio item at a time corresponding to a break point of the plurality of break points; cause presentation of the second audio item during the time; obtain a spoken command comprising user feedback regarding presentation of the second audio item; determine that the user feedback represents an instruction to use a presentation different than the default presentation for audio items of the second audio item type; determine, based at least partly on one or more arbitration rules, the user feedback, the first metadata, and the second metadata, to present an alternate presentation of audio items of the second audio item type during presentation of audio items of the first audio item type, wherein the alternate presentation comprises an alternative to the default presentation for audio items of the second audio item type; and cause presentation of a third audio item of the second audio item type during presentation of a fourth audio item of the first audio item type using the alternate presentation, wherein the alternate presentation is used based at least partly on the third audio item being of the second audio item type.