Building an Audio Recorder

Recording audio is the most performance-intensive operation our app must handle. It is also the one feature where having access to native APIs will be the most rewarding. We want our users to be able to record with the lowest latency possible for the mobile device in order to achieve the highest fidelity of sound. Additionally, this recording should optionally happen over the top of an existing mix of pre-recorded tracks all playing in sync .

Since this phase of our app development will dive the deepest into platform-specific native APIs, we will split our implementations into two phases. We will first build out the iOS-specific details of the recording features, followed by Android.

In this chapter, we will cover ...

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