Let file = try AVAudioFile(forReading: fileURL)ĪudioLengthSeconds = Double(audioLengthSamples) / audioSampleRate The methods used to make the player are provided for you to fill out. At the top, under Public properties, you’ll see all the properties used in the view to lay out the audio player. Open Models/PlayerViewModel.swift and look inside. You’ll add two nodes to the project: AVAudioPlayerNode and AVAudioUnitTimePitch.īy utilizing these frameworks, you can avoid delving into the low-level processing of audio information and focus on the higher-level features you want to add to your app. AVAudioEngine is a class that defines a group of connected audio nodes.AVAudioEngine is a part of AVFoundation.AVFoundation is an Objective-C/Swift framework.CoreAudio and AudioToolbox are the low-level C frameworks.Understanding iOS Audio Frameworksīefore jumping into the project, here’s a quick overview of the iOS Audio frameworks: However, the controls are set up to call their respective view model methods that you’ll implement. In fact, they’re disabled for now since the audio isn’t ready to play.
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When you’re done, you’ll have a fantastic app for listening to podcasts and audio files.ĭownload the starter project by clicking the Download Materials button at the top or bottom of the tutorial.īuild and run your project in Xcode, and you’ll see the basic UI:
Audio swift how to#
This AVAudioEngine tutorial will show you how to use Apple’s new, higher-level audio toolkit to make audio processing apps without the need to dive into Core Audio. Thankfully, that all changed in 2014 with the release of iOS 8 and AVAudioEngine.
That’s because, prior to iOS 8, it meant diving into the depths of the low-level Core Audio framework - a trip only a few brave souls dared to make. Mention audio processing to most iOS developers, and they’ll give you a look of fear and trepidation. We'll instantiate our player here, inside viewDidLoad.Update note: Ryan Ackermann updated this tutorial for iOS 14, Xcode 12 and Swift 5. replace the string below with the URL of some other MP3. If you'd rather not use this sound file,
Import AVFoundation // The AV Foundation framework lets us work Fire up Xcode and follow along…Ĭreate a new single view Swift application in Xcode, then replace the contents of ViewController.swift with the following code: // Our quick and dirty sound streaming app,
Audio swift code#
Many “why isn’t my app playing any sounds?” questions on Stack Overflow include code snippets that make the same mistake that I’m about to demonstrate. That way, all you have to follow along is either type in or copy-and-paste code without having to bring a sound file into your project. While these examples use an AVPlayer object to play an online MP3, what I’m demonstrating is equally valid for apps that use an AVAudioPlayer object to play an MP3 stored as a local file or in memory. To make my point as clear as possible, the examples will be simple: they’ll be attempts at creating an app that plays an MP3 located at a given URL. The long answer, complete with code examples, appears below. I’ve seen this question asked often enough that I’ve decided to post this article as an answer that I can point to from now on.īecause your AVPlayer or AVAudioPlayer went out of scope just as the sound started playing. I’m not getting any errors, so why isn’t the AVPlayer or AVAudioPlayer in my iOS app playing anything? They essentially asked the same question: While answering this question on Stack Overflow, I noticed that in the “Related” list running down the right-hand side of the page that there were several similar questions.
Audio swift tv#
Quite possibly the first mobile phone to make regular appearances on a TV show. Maxwell Smart, the protagonist of the 1960s spy comedy Get Smart, and his shoe phone,
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