diff --git a/services/audiomanager/managersink/src/daudio_sink_dev.cpp b/services/audiomanager/managersink/src/daudio_sink_dev.cpp
index 908b945fa7a71abc07d45bf54a5729eb6d7de1e1..33274a1f91b6f08907b4a561314fac15327f940c 100644
--- a/services/audiomanager/managersink/src/daudio_sink_dev.cpp
+++ b/services/audiomanager/managersink/src/daudio_sink_dev.cpp
@@ -387,7 +387,6 @@ void DAudioSinkDev::NotifySourceDev(const AudioEventType type, const std::string
 {
     std::random_device rd;
     const uint32_t randomTaskCode = rd();
-    
     cJSON *jEvent = cJSON_CreateObject();
     if (jEvent == nullptr) {
         DHLOGE("Failed to create JSON data.");
@@ -397,7 +396,6 @@ void DAudioSinkDev::NotifySourceDev(const AudioEventType type, const std::string
     cJSON_AddNumberToObject(jEvent, KEY_RESULT, result);
     cJSON_AddNumberToObject(jEvent, KEY_EVENT_TYPE, static_cast<int>(type));
     cJSON_AddNumberToObject(jEvent, KEY_RANDOM_TASK_CODE, randomTaskCode);
-    
     DHLOGD("Notify source dev, new engine, random task code:%u", randomTaskCode);
     if (type == NOTIFY_OPEN_CTRL_RESULT || type == NOTIFY_CLOSE_CTRL_RESULT) {
         DHLOGE("In new engine mode, ctrl is not allowed.");
@@ -411,7 +409,6 @@ void DAudioSinkDev::NotifySourceDev(const AudioEventType type, const std::string
         return;
     }
     std::string messageStr(message);
-
     if (speakerClient_ != nullptr) {
         speakerClient_->SendMessage(static_cast<uint32_t>(type), messageStr, devId_);
     }
diff --git a/services/audiomanager/managersource/src/daudio_source_dev.cpp b/services/audiomanager/managersource/src/daudio_source_dev.cpp
index c3a16f4dd2bc3e371405470b7030abcea35b3aa2..528f5f3030e42f32134e918554695a19a3d62fd8 100644
--- a/services/audiomanager/managersource/src/daudio_source_dev.cpp
+++ b/services/audiomanager/managersource/src/daudio_source_dev.cpp
@@ -654,15 +654,14 @@ int32_t DAudioSourceDev::TaskEnableDAudio(const std::string &args)
         return ERR_DH_AUDIO_NULLPTR;
     }
     int32_t dhId = std::atoi(jsonDhId->valuestring);
-    char *attrs = cJSON_PrintUnformatted(cJSON_GetObjectItem(jParam, KEY_ATTRS));
-    std::string attrsStr(attrs);
     int32_t result = 0;
     switch (GetDevTypeByDHId(dhId)) {
         case AUDIO_DEVICE_TYPE_SPEAKER:
-            result =  EnableDSpeaker(dhId, attrsStr);
+            result = EnableDSpeaker(dhId,
+                                    std::string(cJSON_GetObjectItemCaseSensitive(jParam, KEY_ATTRS)->valuestring));
             break;
         case AUDIO_DEVICE_TYPE_MIC:
-            result = EnableDMic(dhId, attrsStr);
+            result = EnableDMic(dhId, std::string(cJSON_GetObjectItemCaseSensitive(jParam, KEY_ATTRS)->valuestring));
             break;
         default:
             DHLOGE("Unknown audio device.");
@@ -670,7 +669,6 @@ int32_t DAudioSourceDev::TaskEnableDAudio(const std::string &args)
             break;
     }
     cJSON_Delete(jParam);
-    cJSON_free(attrs);
     return result;
 }
 
@@ -717,18 +715,10 @@ void DAudioSourceDev::OnEnableTaskResult(int32_t resultCode, const std::string &
         cJSON_Delete(jParam);
         return;
     }
-    char *devId = cJSON_PrintUnformatted(cJSON_GetObjectItem(jParam, KEY_DEV_ID));
-    std::string devIdStr(devId);
-    char *dhId = cJSON_PrintUnformatted(cJSON_GetObjectItem(jParam, KEY_DH_ID));
-    std::string dhIdStr(dhId);
-    mgrCallback_->OnEnableAudioResult(devIdStr, dhIdStr, resultCode);
+    mgrCallback_->OnEnableAudioResult(std::string(cJSON_GetObjectItemCaseSensitive(jParam, KEY_DEV_ID)->valuestring),
+                                      std::string(cJSON_GetObjectItemCaseSensitive(jParam, KEY_DH_ID)->valuestring),
+                                      resultCode);
     cJSON_Delete(jParam);
-    if (devId != nullptr) {
-        cJSON_free(devId);
-    }
-    if (dhId != nullptr) {
-        cJSON_free(dhId);
-    }
 }
 
 int32_t DAudioSourceDev::TaskDisableDAudio(const std::string &args)
@@ -815,18 +805,10 @@ void DAudioSourceDev::OnDisableTaskResult(int32_t resultCode, const std::string
         cJSON_Delete(jParam);
         return;
     }
-    char *devId = cJSON_PrintUnformatted(cJSON_GetObjectItem(jParam, KEY_DEV_ID));
-    std::string devIdStr(devId);
-    char *dhId = cJSON_PrintUnformatted(cJSON_GetObjectItem(jParam, KEY_DH_ID));
-    std::string dhIdStr(dhId);
-    mgrCallback_->OnDisableAudioResult(devIdStr, dhIdStr, resultCode);
+    mgrCallback_->OnDisableAudioResult(std::string(cJSON_GetObjectItemCaseSensitive(jParam, KEY_DEV_ID)->valuestring),
+                                       std::string(cJSON_GetObjectItemCaseSensitive(jParam, KEY_DH_ID)->valuestring),
+                                       resultCode);
     cJSON_Delete(jParam);
-    if (devId != nullptr) {
-        cJSON_free(devId);
-    }
-    if (dhId != nullptr) {
-        cJSON_free(dhId);
-    }
 }
 
 int32_t DAudioSourceDev::TaskOpenDSpeaker(const std::string &args)