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

# Frame Synthesis

> Perform singing voice synthesis.

**Laravel Implementation Status**: ✅ Fully supported by Core (fallback implemented)



## OpenAPI

````yaml https://raw.githubusercontent.com/invokable/laravel-voicevox/refs/heads/main/docs/en/laravel-openapi.json post /frame_synthesis
openapi: 3.1.0
info:
  title: VOICEVOX ENGINE OSS
  description: VOICEVOX OSS  text-to-speech synthesis engine.
  version: latest
servers: []
security: []
paths:
  /frame_synthesis:
    post:
      tags:
        - Speech Synthesis
      summary: Frame Synthesis
      description: >-
        Perform singing voice synthesis.


        **Laravel Implementation Status**: ✅ Fully supported by Core (fallback
        implemented)
      operationId: frame_synthesis
      parameters:
        - name: speaker
          in: query
          required: true
          schema:
            type: integer
            title: Speaker
        - name: core_version
          in: query
          required: false
          schema:
            type: string
            title: Core Version
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/FrameAudioQuery'
      responses:
        '200':
          description: Successful Response
          content:
            audio/wav:
              schema:
                type: string
                format: binary
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    FrameAudioQuery:
      properties:
        f0:
          items:
            type: number
          type: array
          title: F0
          description: Frame-by-frame fundamental frequency
        volume:
          items:
            type: number
          type: array
          title: Volume
          description: Frame-by-frame volume
        phonemes:
          items:
            $ref: '#/components/schemas/FramePhoneme'
          type: array
          title: Phonemes
          description: List of phonemes
        volumeScale:
          type: number
          title: Volumescale
          description: Overall volume
        outputSamplingRate:
          type: integer
          title: Outputsamplingrate
          description: Output sampling rate of the audio data
        outputStereo:
          type: boolean
          title: Outputstereo
          description: Whether to output audio data in stereo
      type: object
      required:
        - f0
        - volume
        - phonemes
        - volumeScale
        - outputSamplingRate
        - outputStereo
      title: FrameAudioQuery
      description: Frame-by-frame query for speech synthesis.
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    FramePhoneme:
      properties:
        phoneme:
          type: string
          title: Phoneme
          description: Phoneme
        frame_length:
          type: integer
          title: Frame Length
          description: Frame length of the phoneme
        note_id:
          anyOf:
            - type: string
            - type: 'null'
          title: Note Id
          description: Note ID
      type: object
      required:
        - phoneme
        - frame_length
      title: FramePhoneme
      description: Phoneme information.
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError

````