fix: download_format option for audio response, handling in create_speech

api/src/routers/openai_compatible.py

@@ -197,7 +197,9 @@ async def create_speech(
             if request.return_download_link:
                 from ..services.temp_manager import TempFileWriter
 
-                temp_writer = TempFileWriter(request.response_format)
+                # Use download_format if specified, otherwise use response_format
+                output_format = request.download_format or request.response_format
+                temp_writer = TempFileWriter(output_format)
                 await temp_writer.__aenter__()  # Initialize temp file
 
                 # Get download path immediately after temp file creation
@@ -205,7 +207,7 @@ async def create_speech(
 
                 # Create response headers with download path
                 headers = {
-                    "Content-Disposition": f"attachment; filename=speech.{request.response_format}",
+                    "Content-Disposition": f"attachment; filename=speech.{output_format}",
                     "X-Accel-Buffering": "no",
                     "Cache-Control": "no-cache",
                     "Transfer-Encoding": "chunked",

api/src/structures/schemas.py

@@ -60,6 +60,10 @@ class OpenAISpeechRequest(BaseModel):
         default="mp3",
         description="The format to return audio in. Supported formats: mp3, opus, flac, wav, pcm. PCM format returns raw 16-bit samples without headers. AAC is not currently supported.",
     )
+    download_format: Optional[Literal["mp3", "opus", "aac", "flac", "wav", "pcm"]] = Field(
+        default=None,
+        description="Optional different format for the final download. If not provided, uses response_format.",
+    )
     speed: float = Field(
         default=1.0,
         ge=0.25,

web/src/services/AudioService.js

@@ -39,7 +39,8 @@ export class AudioService {
                 body: JSON.stringify({
                     input: text,
                     voice: voice,
-                    response_format: 'mp3',
+                    response_format: 'mp3', // Always use mp3 for streaming playback
+                    download_format: document.getElementById('format-select').value || 'mp3', // Format for final download
                     stream: true,
                     speed: speed,
                     return_download_link: true,