This means you need to conform your class to the AVAudioRecorderDelegate protocol to handle callbacks from AVAudioRecorder. We assign self to be the delegate of the audio recorder. See Apple API reference for details of settingsĪudioRecorder = try AVAudioRecorder(url: filename, settings: settings) This needs to decide where to save the audio,Ĭonfigure the recording settings, then start We stop the recording then nullify the recording instance. We also need to add a way to finishRecording(). Accessing Recorder Timing var currentTime: TimeInterval The time, in seconds, since the beginning of the recording. This example startRecording(), needs to decide where to save the audio, and configure the recording settings before starting recording. In addition, it also doesn’t support video recording. That means you can’t analyze or process the audio before it writes to the target file. The disadvantage of it is, it doesn’t provide you any audio sample buffer when it does the recording. You then can start and stop the recording at the time when you want. You basically tell iOS the path where you want to record to and any audio format settings, such as stereo/mono and AAC/WAV. This article briefly shows the purpose of each of these APIs and their pros and cons.ĪVAudioRecorder is the simplest audio recording API in iOS. It can be confusing to a beginner which API to use. If the user says “delete the recording”, simply call deleteRecording() on the recorder instance.There are a few different sets of iOS libraries that provide audio recording functionality. In this example I use the new iOS 8 UIAlertController class. enable a disabled play button) and/or prompt the user to keep or discard the recording. At this point you can update the UI (e.g. I set the recorder’s delegate in order to be notified that the recorder has stopped recording. Recorder = try AVAudioRecorder(URL: soundFileURL, settings: recordSettings) 4.2 Recording Sound with AVAudioRecorder. Recorder.prepareToRecord() // creates/overwrites the file at soundFileURL By default, an AVAudioPlayer will play its sound one time only. Self.recorder = AVAudioRecorder(URL: soundFileURL, settings: recordSettings, error: &error) You’ll have to install a timer to periodically ask the recorder for the values. If you’re going to write a VU meter style graph, you can tell the recorder to meter the recording. In Device Manager reached by right clicking the Start button, compare all other drivers including Chipset, display, sound, etc to make sure you have the latest vs. If the recorder is created successfully, you can then call prepareToRecord() which will create or overwrite the sound file at the specified URL. 1) Try Updating the webcam driver from the PC maker's Support Downloads web page for your full model number, Serial Number, or Dell Service Tag number from sticker on PC. Then you create the recorder with those settings and the URL of the output sound file. Here are a few settings to record in Apple Lossless format.ĪVFormatIDKey: NSNumber(unsignedInt:kAudioFormatAppleLossless),ĪVEncoderAudioQualityKey : (), Predefined Core Audio data format identifiers such as kAudioFormatLinearPCM and kAudioFormatAC3. The first thing you need to do when creating a recorder is to specify the audio format that the recorder will use. Essentially, you simply configure and create an AVAudioRecorder instance, and tell it to record/stop in actions. AVFoundation makes audio recording a lot simpler than recording using Core Audio.
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