What are the new voices? In gpt-realtime there were 10 voices and the release mentioned 2 new voices, however I can’t find the new voice names 
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There’s no new voices seen with realtime/audio-1.5; forcing an error, the API reports its enums:
Supported values are: 'alloy', 'echo', 'fable', 'onyx', 'nova', 'shimmer', 'coral', 'verse', 'ballad', 'ash', 'sage', 'marin', and 'cedar'
There’s really no “announcement” or blog; Azure has a better presentation of the 1.5 models being available in their changelog.
Two new voices accompanied the prior model, which might be what you were reading?
# ORIGINAL voices: alloy, echo, fable, onyx, nova, and shimmer
# NEW: ash, ballad, coral, sage, verse
# NEW: 2025-08: marin, cedar
Also, with that tool calling, you can…
