> ## Documentation Index
> Fetch the complete documentation index at: https://docs.interchange.io/llms.txt
> Use this file to discover all available pages before exploring further.

# AudioStack creative-tool compatibility

> Current public support and limitations for AudioStack audio generation in Interchange

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.

<Note>
  **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.
</Note>

## Capability states

| Capability                           | Public state      | Current contract                                                                                                                                                           |
| ------------------------------------ | ----------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `build_creative`                     | `implemented`     | One request performs a full provider render and returns one `audio_hosted` manifest containing the rendered audio asset.                                                   |
| `preview_creative`                   | `not_implemented` | AudioStack has no preview-only path in the current integration. To audition an output, run `build_creative` and play the returned audio; this is a full render.            |
| Provider creative-library round trip | `not_implemented` | The integration is stateless: it cannot look up a `creative_id`, sync a creative into an AudioStack library, or list/read it back later. Each build starts a fresh render. |
| Multi-length output from one brief   | `not_implemented` | One build selects one exact duration. To produce both 15-second and 30-second versions, submit separate full builds.                                                       |
| Media buying                         | `not_applicable`  | AudioStack exposes no products, campaigns, targeting, delivery reporting, or other media-buy surface in this integration.                                                  |

`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.

## 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.

## 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.

## Public sources

* [AudioStack API overview](https://docs.audiostack.ai/docs/audiostack-api)
* [Generative creative provider credentials](/v2/buyer/creatives/generative-creative)