streaming=true is documented as the default. false returns a generated-file URL; this is not an asynchronous discounted batch API or bidirectional input streaming.
Batch processing
Not collected
No reviewed model-specific specification; unknown is not unsupported.
Fine-tuning
Not collected
No reviewed model-specific specification; unknown is not unsupported.
Reasoning
Not collected
No reviewed model-specific specification; unknown is not unsupported.
Context caching
Not collected
No reviewed model-specific specification; unknown is not unsupported.
Base model
Not collected
No reviewed model-specific specification; unknown is not unsupported.
Select a voice by name, with optional language and accent. The public request has no neural checkpoint selector. Native engine and voice-version mapping remain unverified.Source for Model selection (opens in a new tab)
GET /auth uses Basic credentials for the registered email/password, then other calls use a Bearer access token. Access token: 3 hours. Refresh token: 30 days since last refresh; GET /auth/expire invalidates related tokens. Token lifetime is not data retention or cache lifetime.Source for Authentication (opens in a new tab)
Response format
Binary audio, or JSON with an audio URL when streaming=false. X-CereVoice-CharCount reports billed input characters. metadata=true adds X-CereVoice-Metadata linking XML word/phone/marker timings. Fixed metadata does not establish arbitrary structured-output generation.Source for Response format (opens in a new tab)
Stock voice catalog
Authenticated GET /voices filters language/accent/gender and returns name, sample rates, language/country/accent codes and regional metadata. The Heather response is an example, not the complete voice inventory or a verified neural model assignment.Source for Stock voice catalog (opens in a new tab)
Published price
Not collected
The Cloud uses character credits, but precise MusicXML/lyric metering and a singing-specific monetary tariff are not established. No per-minute, per-song or token conversion inferred.
Creation privacy
The current API specification links Cloud Agreement V1.0, copyright 2012. A separately negotiated commercial agreement takes precedence. It reserves proprietary service rights and permits collection of technical information to improve products or customize services. It does not establish a current inference retention period, training opt-out, zero retention or processing region. Website desktop single-user restrictions are a separate licence.Source for Creation privacy (opens in a new tab)
Documentation discrepancy
The API overview prose points to POST /auth, but Swagger declares GET /auth. Desktop product deprecation is scoped separately. Linked cloud terms are V1.0 from 2012; customer commercial agreements take precedence.Source for Documentation discrepancy (opens in a new tab)
Music controls
MusicXML score with a vocal part; optional tempo in BPM overrides the score, otherwise score tempo or 120 BPM. transpose shifts by half steps, default 0. part selects a score part; default chooses the part with most lyrics. This is score-driven vocal synthesis, not a prompt-to-full-song model.Source for Music controls (opens in a new tab)
Access & pricing
Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.
Voice-name selection; no public model checkpoint ID.
Access
POST https://api.cerevoice.com/v2/sing, authenticated Bearer token; required MusicXML score body. streaming=true returns audio; false returns a file URL. Account and credits required.
Regions
Inference region not established; UK corporate address is not proof of data residency.
Endpoint pricing has not been collected. Check the provider for applicable rates.
Data & enterprise terms
The current API specification links Cloud Agreement V1.0, copyright 2012. A separately negotiated commercial agreement takes precedence. It reserves proprietary service rights and permits collection of technical information to improve products or customize services. It does not establish a current inference retention period, training opt-out, zero retention or processing region. Website desktop single-user restrictions are a separate licence.
Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.
01 / INITIAL INPUTProcess & retain
The system processes eligible input and retains reusable state.
02 / LATER REQUESTCheck available state
Reuse depends on matching input, session state and the cache policy.
03 / CACHE HITReuse & generate
Reusing state can reduce repeated work. Any charges follow the billing rules below.
CereVoice Cloud V2
Not verified
No documented inference-cache contract. Saved audio, access tokens and stored lexicons are not prompt caching.
How it works
Not collected
No documented inference-cache contract. Saved audio, access tokens and stored lexicons are not prompt caching.
Minimum reusable input
Not collected
No documented inference-cache contract. Saved audio, access tokens and stored lexicons are not prompt caching.
Lifetime & refresh
Not collected
No documented inference-cache contract. Saved audio, access tokens and stored lexicons are not prompt caching.
How to enable it
Not collected
No documented inference-cache contract. Saved audio, access tokens and stored lexicons are not prompt caching.
Usage fields
Not collected
No documented inference-cache contract. Saved audio, access tokens and stored lexicons are not prompt caching.
Billing rules
Not collected
No documented inference-cache contract. Saved audio, access tokens and stored lexicons are not prompt caching.
Limits & data boundaries
Not collected
No documented inference-cache contract. Saved audio, access tokens and stored lexicons are not prompt caching.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
Caching reviewed 16 Oct 2026
What the measurements say
No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.
Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.
The record behind the model
Why it is included
Proprietary cloud service with limited use rights and no published checkpoint selector. This managed component does not assert that every selected voice is CereWave or that a separate closed neural base model exists for this API operation.
