New Media Type: Audio

[patmmccann]

see prebid/prebid-server#4003 (comment) and https://github.com/prebid/Prebid.js/pull/12616/files#r1902907751

[patmmccann]

We need to append to https://github.com/prebid/Prebid.js/blob/master/src/mediaTypes.js . We need an audio.js in https://github.com/prebid/Prebid.js/blob/master/src/ . We need ortb2 convertor logic. We need to treat it similar to instream video in that an external library would be responsible for rendering.

There is no GAM audio format, so one should assume the player just renders the winner. Perhaps, this will change, perhaps if publishers are treating audio ad units as video for gam purposes so that a vast is returned, the dfp video module could handle forming a request to the ad server.