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AudioStack is a creative-only audio generation service. It is not a direct media-buy adapter and is intentionally outside the 13-provider media-buy denominator. Interchange uses it to turn a script and voice settings into one rendered audio_hosted creative manifest.
Review-ready, not provider-endorsed · last verified 2026-08-16. These states describe the current Interchange runtime. They do not prove that a particular AudioStack account, voice, language, or upstream service is currently eligible.

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Capability states

implemented here means the current runtime has the named request and response path. It does not mean fresh signed live evidence exists or that the selected provider account is currently eligible.

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Supported build shape

AudioStack accepts the canonical audio_hosted format. A build requires a text script asset and can bind a voice, language, brand name, speed, and music template. The current runtime supports one of these output choices per call:
  • duration_ms_exact: 15000 for a 15-second audio ad;
  • duration_ms_exact: 30000 for a 30-second audio ad; or
  • no exact duration for the voiceover path.
Legacy agent-URL format references are not accepted. AudioStack does not publish a separate buyer-selectable format catalog; list_creative_formats returns an empty list because the integration consumes canonical audio_hosted directly.

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Provider and account constraints

AudioStack access is bring-your-own-key. The connected credential resolves one billable AudioStack organization, and the advertiser must be mapped to that provider connection before generation. Authentication, provider rate limits, voice availability, and upstream rendering availability can still block an otherwise valid build. Interchange does not publish a market or voice eligibility denominator for AudioStack; the selected provider account remains authoritative. Static tests cover the creative-only registration and the fail-closed limitations above. No current dated, signed, account-bound full-render artifact is published as live certification.

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Public sources