exactly same error on AudioOutputUnitStart(audioUnit)
2020-12-04 16:49:56.178109+0600 SmartPTT Mobile POC[27425:428232] libMobileGestalt MobileGestalt.c:890: MGIsDeviceOneOfType is not supported on this platform.
2020-12-04 16:49:56.304682+0600 SmartPTT Mobile POC[27425:428630] AudioSession CONFIGURE
2020-12-04 16:49:56.587731+0600 SmartPTT Mobile POC[27425:428738] [AudioHALClient] HALBIOBufferManager.cpp:226:GetIOBuffer: HALBIOBufferManager::GetIOBuffer: the stream index is out of range
2020-12-04 16:49:56.588077+0600 SmartPTT Mobile POC[27425:428738] [AudioHALClient] HALBIOBufferManager.cpp:226:GetIOBuffer: HALB_IOBufferManager::GetIOBuffer: the stream index is out of range
2020-12-04 16:49:56.604511+0600 SmartPTT Mobile POC[27425:428738] [aqme] 254: AQDefaultDevice (1): output stream 0: null buffer
2020-12-04 16:49:56.605534+0600 SmartPTT Mobile POC[27425:428738] [aqme] 1640: EXCEPTION thrown (-50): -