设置音频编码格式

GMAILab/Classes/ToFace/VideoTelephone/manager/GMRtcManager.m

@@ -38,9 +38,9 @@ static id _manager;
 {
     self = [super init];
     if (self) {
-        
         _rtcEngine = [TTTRtcEngineKit sharedEngineWithAppId:TTTAppID delegate:nil];
         [_rtcEngine setSignalTimeout:30];
+        [_rtcEngine setPreferAudioCodec:TTTRtc_AudioCodec_ISAC_WB bitrate:32 channels:1];
         _me = [[GMTTTUser alloc] initWith:0];
         _localProfile = TTTRtc_VideoProfile_Default;
         _cdnProfile = TTTRtc_VideoProfile_Default;