diff --git a/relay/controller/audio.go b/relay/controller/audio.go
index e3d57b1e..2f792ce3 100644
--- a/relay/controller/audio.go
+++ b/relay/controller/audio.go
@@ -8,6 +8,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"mime/multipart"
 	"net/http"
 	"strings"
 
@@ -30,8 +31,7 @@ import (
 func RelayAudioHelper(c *gin.Context, relayMode int) *relaymodel.ErrorWithStatusCode {
 	ctx := c.Request.Context()
 	meta := meta.GetByContext(c)
-	audioModel := "whisper-1"
-
+	audioModel := "gpt-4o-transcribe"
 	tokenId := c.GetInt(ctxkey.TokenId)
 	channelType := c.GetInt(ctxkey.Channel)
 	channelId := c.GetInt(ctxkey.ChannelId)
@@ -124,12 +124,13 @@ func RelayAudioHelper(c *gin.Context, relayMode int) *relaymodel.ErrorWithStatus
 	fullRequestURL := openai.GetFullRequestURL(baseURL, requestURL, channelType)
 	if channelType == channeltype.Azure {
 		apiVersion := meta.Config.APIVersion
+		deploymentName := c.GetString(ctxkey.ChannelName)
 		if relayMode == relaymode.AudioTranscription {
 			// https://learn.microsoft.com/en-us/azure/ai-services/openai/whisper-quickstart?tabs=command-line#rest-api
-			fullRequestURL = fmt.Sprintf("%s/openai/deployments/%s/audio/transcriptions?api-version=%s", baseURL, audioModel, apiVersion)
+			fullRequestURL = fmt.Sprintf("%s/openai/deployments/%s/audio/transcriptions?api-version=%s", baseURL, deploymentName, apiVersion)
 		} else if relayMode == relaymode.AudioSpeech {
 			// https://learn.microsoft.com/en-us/azure/ai-services/openai/text-to-speech-quickstart?tabs=command-line#rest-api
-			fullRequestURL = fmt.Sprintf("%s/openai/deployments/%s/audio/speech?api-version=%s", baseURL, audioModel, apiVersion)
+			fullRequestURL = fmt.Sprintf("%s/openai/deployments/%s/audio/speech?api-version=%s", baseURL, deploymentName, apiVersion)
 		}
 	}
 
@@ -138,8 +139,73 @@ func RelayAudioHelper(c *gin.Context, relayMode int) *relaymodel.ErrorWithStatus
 	if err != nil {
 		return openai.ErrorWrapper(err, "new_request_body_failed", http.StatusInternalServerError)
 	}
-	c.Request.Body = io.NopCloser(bytes.NewBuffer(requestBody.Bytes()))
-	responseFormat := c.DefaultPostForm("response_format", "json")
+
+	// 处理表单数据
+	contentType := c.Request.Header.Get("Content-Type")
+	responseFormat := "json"
+	var contentTypeWithBoundary string
+
+	if strings.Contains(contentType, "multipart/form-data") {
+		originalBody := requestBody.Bytes()
+		c.Request.Body = io.NopCloser(bytes.NewBuffer(originalBody))
+		err = c.Request.ParseMultipartForm(32 << 20) // 32MB 最大内存
+		if err != nil {
+			return openai.ErrorWrapper(err, "parse_multipart_form_failed", http.StatusInternalServerError)
+		}
+
+		// 获取响应格式
+		if format := c.Request.FormValue("response_format"); format != "" {
+			responseFormat = format
+		}
+
+		requestBody = &bytes.Buffer{}
+		writer := multipart.NewWriter(requestBody)
+
+		// 复制表单字段
+		for key, values := range c.Request.MultipartForm.Value {
+			for _, value := range values {
+				err = writer.WriteField(key, value)
+				if err != nil {
+					return openai.ErrorWrapper(err, "write_field_failed", http.StatusInternalServerError)
+				}
+			}
+		}
+
+		// 复制文件
+		for key, fileHeaders := range c.Request.MultipartForm.File {
+			for _, fileHeader := range fileHeaders {
+				file, err := fileHeader.Open()
+				if err != nil {
+					return openai.ErrorWrapper(err, "open_file_failed", http.StatusInternalServerError)
+				}
+
+				part, err := writer.CreateFormFile(key, fileHeader.Filename)
+				if err != nil {
+					file.Close()
+					return openai.ErrorWrapper(err, "create_form_file_failed", http.StatusInternalServerError)
+				}
+
+				_, err = io.Copy(part, file)
+				file.Close()
+				if err != nil {
+					return openai.ErrorWrapper(err, "copy_file_failed", http.StatusInternalServerError)
+				}
+			}
+		}
+
+		// 完成multipart写入
+		err = writer.Close()
+		if err != nil {
+			return openai.ErrorWrapper(err, "close_writer_failed", http.StatusInternalServerError)
+		}
+
+		// 更新Content-Type
+		contentTypeWithBoundary = writer.FormDataContentType()
+		c.Request.Header.Set("Content-Type", contentTypeWithBoundary)
+	} else {
+		// 对于非表单请求，直接重置请求体
+		c.Request.Body = io.NopCloser(bytes.NewBuffer(requestBody.Bytes()))
+	}
 
 	req, err := http.NewRequest(c.Request.Method, fullRequestURL, requestBody)
 	if err != nil {
@@ -151,11 +217,26 @@ func RelayAudioHelper(c *gin.Context, relayMode int) *relaymodel.ErrorWithStatus
 		apiKey := c.Request.Header.Get("Authorization")
 		apiKey = strings.TrimPrefix(apiKey, "Bearer ")
 		req.Header.Set("api-key", apiKey)
-		req.ContentLength = c.Request.ContentLength
+		// 确保请求体大小与Content-Length一致
+		req.ContentLength = int64(requestBody.Len())
 	} else {
 		req.Header.Set("Authorization", c.Request.Header.Get("Authorization"))
+		// 确保请求体大小与Content-Length一致
+		req.ContentLength = int64(requestBody.Len())
+	}
+
+	// 确保Content-Type正确传递
+	if strings.Contains(contentType, "multipart/form-data") && c.Request.MultipartForm != nil {
+		// 对于multipart请求，使用我们重建时生成的Content-Type
+		// 注意：此处必须使用writer生成的boundary
+		if contentTypeWithBoundary != "" {
+			req.Header.Set("Content-Type", contentTypeWithBoundary)
+		} else {
+			req.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
+		}
+	} else {
+		req.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
 	}
-	req.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
 	req.Header.Set("Accept", c.Request.Header.Get("Accept"))
 
 	resp, err := client.HTTPClient.Do(req)