Swift 2.0: Type of Expression is ambiguous without more context?
You could give the compiler more information: let recordSettings : [String : Any] = [ AVFormatIDKey: kAudioFormatMPEG4AAC, AVEncoderAudioQualityKey : AVAudioQuality.Max.rawValue, AVEncoderBitRateKey : 320000, AVNumberOfChannelsKey: 2, AVSampleRateKey : 44100.0 ]