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I'm trying to set up a Twilio VOIP Client on iOS and have been able to make all of the examples connect to the example server. However when I run in the simulator or on device, I'm not able to hear any audio from the VOIP call. Are there any special audio settings needed? I've already tried: 

UInt32 route = kAudioSessionOverrideAudioRoute_Speaker;
AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute, sizeof(route), &route);

but had no luck. I've also set audio and voip for UIBackgroundModes. Is there anything else I should be setting up?

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您使用的是 Twilio 的试用帐户吗？如果您遵循他们的文档并且客户端 VOIP 呼叫仍然存在问题，那么可能值得一试进行升级。Twilio 的免费试用帐户一直存在问题，所以我会先尝试更新。

于 2013-05-06T20:43:53.007 回答