> ## Documentation Index > Fetch the complete documentation index at: https://docs.slng.ai/llms.txt > Use this file to discover all available pages before exploring further. # Murf Falcon > Stream high-quality multilingual speech synthesis from Murf Falcon over WebSocket with selectable encodings, sample rates, and SLNG's unified TTS protocol. **Hosting: routed through SLNG (Murf).** This model runs on Murf's servers; SLNG proxies each request through the nearest regional gateway. Available in Netherlands, Germany, United States (East, West), Australia, Brazil, United Kingdom, Indonesia, Israel, India, Japan, Singapore, South Africa. Connect to your region's gateway WebSocket endpoint: `wss://eu-north.api.slng.ai`, `wss://eu-west.api.slng.ai`, `wss://us-east.api.slng.ai`, `wss://us-west.api.slng.ai`, `wss://au.api.slng.ai`, `wss://br.api.slng.ai`, `wss://gb.api.slng.ai`, `wss://id.api.slng.ai`, `wss://il.api.slng.ai`, `wss://in.api.slng.ai`, `wss://jp.api.slng.ai`, `wss://sg.api.slng.ai`, `wss://za.api.slng.ai`. ## AsyncAPI ````yaml api-reference/asyncapi/tts-murf.asyncapi.yaml /v1/tts/murf/murftts:falcon id: /v1/tts/murf/murftts:falcon title: Murf Falcon description: >- Stream high-quality multilingual speech synthesis from Murf Falcon over WebSocket with selectable encodings, sample rates, and SLNG's unified TTS protocol. servers: - id: production-eu-north protocol: wss host: eu-north.api.slng.ai bindings: [] variables: [] - id: production-eu-west protocol: wss host: eu-west.api.slng.ai bindings: [] variables: [] - id: production-us-east protocol: wss host: us-east.api.slng.ai bindings: [] variables: [] - id: production-us-west protocol: wss host: us-west.api.slng.ai bindings: [] variables: [] - id: production-au protocol: wss host: au.api.slng.ai bindings: [] variables: [] - id: production-br protocol: wss host: br.api.slng.ai bindings: [] variables: [] - id: production-gb protocol: wss host: gb.api.slng.ai bindings: [] variables: [] - id: production-id protocol: wss host: id.api.slng.ai bindings: [] variables: [] - id: production-il protocol: wss host: il.api.slng.ai bindings: [] variables: [] - id: production-in protocol: wss host: in.api.slng.ai bindings: [] variables: [] - id: production-jp protocol: wss host: jp.api.slng.ai bindings: [] variables: [] - id: production-sg protocol: wss host: sg.api.slng.ai bindings: [] variables: [] - id: production-za protocol: wss host: za.api.slng.ai bindings: [] variables: [] address: /v1/tts/murf/murftts:falcon parameters: [] bindings: - protocol: ws version: latest value: method: GET schemaProperties: - name: method type: string description: GET required: false operations: - &ref_1 id: ttsMurfFalconReceiveInit title: Tts murf falcon receive init description: Initialize session on Murf Falcon type: receive messages: - &ref_15 id: MurfTtsInitRequest contentType: application/json payload: - name: Init Request (Murf Falcon) description: >- Initialize a Murf Falcon TTS session with provider-specific configuration. type: object properties: - name: type type: string description: init required: true - name: model type: string description: Murf TTS model identifier. enumValues: - murftts:falcon required: true - name: voice type: string description: Voice identifier for Murf synthesis (e.g., en-US-natalie). required: false - name: config type: object description: Murf Falcon synthesis configuration options. required: false properties: - name: encoding type: string description: Output audio encoding format. enumValues: - pcm - linear16 - mp3 - flac - ulaw - alaw - ogg - wav required: false - name: sample_rate type: integer description: Output audio sample rate in Hz. enumValues: - 8000 - 16000 - 24000 - 44100 - 48000 required: false - name: channel_type type: string description: Audio channel configuration. enumValues: - MONO required: false - name: style type: string description: Voice style for expressive synthesis (e.g., Conversation). required: false - name: rate type: number description: Speech rate adjustment. required: false - name: pitch type: number description: Pitch adjustment. required: false - name: locale type: string description: Language locale for synthesis (e.g., en-US, en-UK, es-ES). required: false - name: speed type: number description: Speech speed multiplier. required: false headers: [] jsonPayloadSchema: type: object description: >- Initialize a Murf Falcon TTS session with voice, style, and audio configuration options specific to Murf. required: - type - model properties: type: type: string const: init default: init x-parser-schema-id: model: type: string description: Murf TTS model identifier. enum: - murftts:falcon default: murftts:falcon x-parser-schema-id: voice: type: string description: Voice identifier for Murf synthesis (e.g., en-US-natalie). x-parser-schema-id: config: type: object description: Murf Falcon synthesis configuration options. properties: encoding: type: string description: Output audio encoding format. enum: - pcm - linear16 - mp3 - flac - ulaw - alaw - ogg - wav default: mp3 x-parser-schema-id: sample_rate: type: integer description: Output audio sample rate in Hz. enum: - 8000 - 16000 - 24000 - 44100 - 48000 default: 24000 x-parser-schema-id: channel_type: type: string description: Audio channel configuration. enum: - MONO default: MONO x-parser-schema-id: style: type: string description: Voice style for expressive synthesis (e.g., Conversation). x-parser-schema-id: rate: type: number description: Speech rate adjustment. x-parser-schema-id: pitch: type: number description: Pitch adjustment. x-parser-schema-id: locale: type: string description: Language locale for synthesis (e.g., en-US, en-UK, es-ES). x-parser-schema-id: speed: type: number description: Speech speed multiplier. x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: title: Init Request (Murf Falcon) description: >- Initialize a Murf Falcon TTS session with provider-specific configuration. example: |- { "type": "init", "model": "murftts:falcon", "voice": "en-US-natalie", "config": { "sample_rate": 24000, "encoding": "mp3", "channel_type": "MONO" } } bindings: [] extensions: - id: x-parser-unique-object-id value: MurfTtsInitRequest bindings: [] extensions: &ref_0 - id: x-parser-unique-object-id value: /v1/tts/murf/murftts:falcon - &ref_2 id: ttsMurfFalconReceiveText title: Tts murf falcon receive text description: Send text to Murf Falcon type: receive messages: - &ref_16 id: TtsTextMessage contentType: application/json payload: - name: Text Message description: Send text to synthesize into audio output. type: object properties: - name: type type: string description: text required: true - name: text type: string description: Text to synthesize required: true - name: flush type: boolean description: Whether to flush remaining audio immediately after this text required: false headers: [] jsonPayloadSchema: type: object description: Send text to synthesize into audio output. required: - type - text properties: type: type: string const: text x-parser-schema-id: text: type: string description: Text to synthesize x-parser-schema-id: flush: type: boolean description: Whether to flush remaining audio immediately after this text x-parser-schema-id: x-parser-schema-id: title: Text Message description: Send text to synthesize into audio output. example: |- { "type": "text", "text": "Hello, this is a test of text-to-speech synthesis." } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsTextMessage bindings: [] extensions: *ref_0 - &ref_3 id: ttsMurfFalconReceiveFlush title: Tts murf falcon receive flush description: Flush buffered output on Murf Falcon type: receive messages: - &ref_17 id: TtsFlushMessage contentType: application/json payload: - name: Flush Message description: Force any buffered text/audio to be finalized and delivered. type: object properties: - name: type type: string description: flush required: true headers: [] jsonPayloadSchema: type: object description: Force any buffered text/audio to be finalized and delivered. required: - type properties: type: type: string const: flush x-parser-schema-id: x-parser-schema-id: title: Flush Message description: Force any buffered text/audio to be finalized and delivered. example: |- { "type": "flush" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsFlushMessage bindings: [] extensions: *ref_0 - &ref_4 id: ttsMurfFalconReceiveClear title: Tts murf falcon receive clear description: Clear queued output on Murf Falcon type: receive messages: - &ref_18 id: TtsClearMessage contentType: application/json payload: - name: Clear Message description: Clear any queued text/audio from the current session. type: object properties: - name: type type: string description: clear required: true headers: [] jsonPayloadSchema: type: object description: Clear any queued text/audio from the current session. required: - type properties: type: type: string const: clear x-parser-schema-id: x-parser-schema-id: title: Clear Message description: Clear any queued text/audio from the current session. example: |- { "type": "clear" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsClearMessage bindings: [] extensions: *ref_0 - &ref_5 id: ttsMurfFalconReceiveClose title: Tts murf falcon receive close description: Close session on Murf Falcon type: receive messages: - &ref_19 id: TtsCloseMessage contentType: application/json payload: - name: Close Message description: Close the session and stop any further audio. type: object properties: - name: type type: string description: close required: true headers: [] jsonPayloadSchema: type: object description: Close the session and stop any further audio. required: - type properties: type: type: string const: close x-parser-schema-id: x-parser-schema-id: title: Close Message description: Close the session and stop any further audio. example: |- { "type": "close" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsCloseMessage bindings: [] extensions: *ref_0 - &ref_6 id: ttsMurfFalconReceiveKeepalive title: Tts murf falcon receive keepalive description: Send keepalive on Murf Falcon type: receive messages: - &ref_20 id: KeepaliveMessage contentType: application/json payload: - name: Keepalive Message description: Keep the WebSocket connection alive during silence. type: object properties: - name: type type: string description: keepalive required: true headers: [] jsonPayloadSchema: type: object description: >- Prevents the connection from being closed due to inactivity. Send periodically during silence to maintain the session. required: - type properties: type: type: string const: keepalive x-parser-schema-id: x-parser-schema-id: title: Keepalive Message description: Keep the WebSocket connection alive during silence. example: |- { "type": "keepalive" } bindings: [] extensions: - id: x-parser-unique-object-id value: KeepaliveMessage bindings: [] extensions: *ref_0 - &ref_7 id: ttsMurfFalconSendReady title: Tts murf falcon send ready description: Receive ready signal from Murf Falcon type: send messages: - &ref_21 id: TtsReadyResponse contentType: application/json payload: - name: Ready Response description: Indicates the session is ready to receive messages. type: object properties: - name: type type: string description: ready required: true - name: session_id type: string description: Unique session identifier required: true headers: [] jsonPayloadSchema: type: object description: Indicates the session is ready to receive messages. required: - type - session_id properties: type: type: string const: ready x-parser-schema-id: session_id: type: string description: Unique session identifier x-parser-schema-id: x-parser-schema-id: title: Ready Response description: Indicates the session is ready to receive messages. example: |- { "type": "ready", "session_id": "sess_tts_abc123" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsReadyResponse bindings: [] extensions: *ref_0 - &ref_8 id: ttsMurfFalconSendAudio title: Tts murf falcon send audio description: Receive audio response from Murf Falcon type: send messages: - &ref_22 id: MurfTtsAudioResponse contentType: application/json payload: - name: Audio Response (Murf Falcon) description: Audio response from Murf Falcon TTS with metadata. type: object properties: - name: type type: string description: audio required: true - name: data type: object required: true properties: - name: audio type: string description: Base64-encoded audio data required: true - name: content_type type: string description: MIME type of the audio data required: false headers: [] jsonPayloadSchema: type: object description: >- Audio response from Murf Falcon TTS containing base64-encoded audio data. required: - type - data properties: type: type: string const: audio x-parser-schema-id: data: type: object required: - audio properties: audio: type: string format: byte description: Base64-encoded audio data x-parser-schema-id: content_type: type: string description: MIME type of the audio data x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: title: Audio Response (Murf Falcon) description: Audio response from Murf Falcon TTS with metadata. example: |- { "type": "audio", "data": { "audio": "UklGRiQAAABXQVZFZm10IBAAAAABAAEA...", "content_type": "audio/mp3" } } bindings: [] extensions: - id: x-parser-unique-object-id value: MurfTtsAudioResponse bindings: [] extensions: *ref_0 - &ref_9 id: ttsMurfFalconSendSegmentStart title: Tts murf falcon send segment start description: Receive segment start from Murf Falcon type: send messages: - &ref_23 id: TtsSegmentStart contentType: application/json payload: - name: Segment Start description: Signals the start of a synthesized segment. type: object properties: - name: type type: string description: segment_start required: true - name: segment_id type: string description: Unique segment identifier required: true headers: [] jsonPayloadSchema: type: object description: Signals the start of a synthesized segment. required: - type - segment_id properties: type: type: string const: segment_start x-parser-schema-id: segment_id: type: string description: Unique segment identifier x-parser-schema-id: x-parser-schema-id: title: Segment Start description: Signals the start of a synthesized segment. example: |- { "type": "segment_start", "segment_id": "seg_001" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsSegmentStart bindings: [] extensions: *ref_0 - &ref_10 id: ttsMurfFalconSendSegmentEnd title: Tts murf falcon send segment end description: Receive segment end from Murf Falcon type: send messages: - &ref_24 id: TtsSegmentEnd contentType: application/json payload: - name: Segment End description: Signals the end of a synthesized segment. type: object properties: - name: type type: string description: segment_end required: true - name: segment_id type: string description: Unique segment identifier required: true headers: [] jsonPayloadSchema: type: object description: Signals the end of a synthesized segment. required: - type - segment_id properties: type: type: string const: segment_end x-parser-schema-id: segment_id: type: string description: Unique segment identifier x-parser-schema-id: x-parser-schema-id: title: Segment End description: Signals the end of a synthesized segment. example: |- { "type": "segment_end", "segment_id": "seg_001" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsSegmentEnd bindings: [] extensions: *ref_0 - &ref_11 id: ttsMurfFalconSendFlushed title: Tts murf falcon send flushed description: Receive flushed confirmation from Murf Falcon type: send messages: - &ref_25 id: TtsFlushed contentType: application/json payload: - name: Flushed description: Acknowledges that buffered output was flushed. type: object properties: - name: type type: string description: flushed required: true headers: [] jsonPayloadSchema: type: object description: Acknowledges that buffered output was flushed. required: - type properties: type: type: string const: flushed x-parser-schema-id: x-parser-schema-id: title: Flushed description: Acknowledges that buffered output was flushed. example: |- { "type": "flushed" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsFlushed bindings: [] extensions: *ref_0 - &ref_12 id: ttsMurfFalconSendCleared title: Tts murf falcon send cleared description: Receive cleared confirmation from Murf Falcon type: send messages: - &ref_26 id: TtsCleared contentType: application/json payload: - name: Cleared description: Acknowledges that queued output was cleared. type: object properties: - name: type type: string description: cleared required: true headers: [] jsonPayloadSchema: type: object description: Acknowledges that queued output was cleared. required: - type properties: type: type: string const: cleared x-parser-schema-id: x-parser-schema-id: title: Cleared description: Acknowledges that queued output was cleared. example: |- { "type": "cleared" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsCleared bindings: [] extensions: *ref_0 - &ref_13 id: ttsMurfFalconSendAudioEnd title: Tts murf falcon send audio end description: Receive audio end from Murf Falcon type: send messages: - &ref_27 id: TtsAudioEnd contentType: application/json payload: - name: Audio End description: Signals the end of audio generation. type: object properties: - name: type type: string description: audio_end required: true - name: duration type: number description: Total audio duration required: false headers: [] jsonPayloadSchema: type: object description: Signals the end of audio generation. required: - type properties: type: type: string const: audio_end x-parser-schema-id: duration: type: number description: Total audio duration x-parser-schema-id: x-parser-schema-id: title: Audio End description: Signals the end of audio generation. example: |- { "type": "audio_end", "duration": 3.5 } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsAudioEnd bindings: [] extensions: *ref_0 - &ref_14 id: ttsMurfFalconSendError title: Tts murf falcon send error description: Receive error from Murf Falcon type: send messages: - &ref_28 id: TtsErrorResponse contentType: application/json payload: - name: Error Response description: Indicates an error occurred during synthesis. type: object properties: - name: type type: string description: error required: true - name: code type: string description: Error code. enumValues: - auth_error - config_error - rate_limit - provider_error required: true - name: message type: string description: Human-readable error description required: true headers: [] jsonPayloadSchema: type: object description: Indicates an error occurred during synthesis. required: - type - code - message properties: type: type: string const: error x-parser-schema-id: code: type: string description: Error code. enum: - auth_error - config_error - rate_limit - provider_error x-parser-schema-id: message: type: string description: Human-readable error description x-parser-schema-id: x-parser-schema-id: title: Error Response description: Indicates an error occurred during synthesis. example: |- { "type": "error", "code": "provider_error", "message": "Provider returned an unexpected error" } bindings: [] extensions: - id: x-parser-unique-object-id value: TtsErrorResponse bindings: [] extensions: *ref_0 sendOperations: - *ref_1 - *ref_2 - *ref_3 - *ref_4 - *ref_5 - *ref_6 receiveOperations: - *ref_7 - *ref_8 - *ref_9 - *ref_10 - *ref_11 - *ref_12 - *ref_13 - *ref_14 sendMessages: - *ref_15 - *ref_16 - *ref_17 - *ref_18 - *ref_19 - *ref_20 receiveMessages: - *ref_21 - *ref_22 - *ref_23 - *ref_24 - *ref_25 - *ref_26 - *ref_27 - *ref_28 extensions: - id: x-parser-unique-object-id value: /v1/tts/murf/murftts:falcon securitySchemes: - id: bearer name: bearer type: http description: > API key issued by SLNG. Pass as `Authorization: Bearer ` in the WebSocket upgrade request headers. scheme: bearer extensions: [] ````