A media automation system can provide a common program to multiple different servers, for example a terrestrial broadcast radio server and a streaming radio server. Each of the different servers can receive different content blocks to be inserted during breaks in the common program. Media items from existing content blocks can be removed, and different items inserted. If a content block is under-filled, media items can be inserted without removing existing media items. When items are removed or added to a content block, the removal can be reported to a traffic and billing system for appropriate action. Content blocks can be customized by removing or inserting items based on information obtained from a cloud-based application, or some other source.