How do I set up audio recording with Novocaine on iOS?

Create a Novocaine instance, set an input block to handle microphone data, and call play. The README provides a concise code snippet for capturing audio in interleaved format with minimal setup.

Novocaine vs AudioKit: which is better for iOS audio?

Novocaine is lighter and more focused on simple, high-performance audio I/O with minimal code, ideal for basic capture/playback. AudioKit offers a broader feature set for synthesis and effects, better for complex audio apps.

Does Novocaine work with Swift?

Yes, but it requires Objective-C bridging since it's written in Objective-C and C++. You'll need to handle file extensions and interoperability, which can add complexity to Swift projects.

How to reduce latency in Novocaine audio processing?

Novocaine uses a C++ RingBuffer for low-latency performance. Ensure proper buffer sizes and avoid heavy processing in callbacks to maintain real-time responsiveness, as hinted in the high-performance focus.

Can I use Novocaine for real-time audio effects like reverb?

Yes, by processing audio in the input or output blocks. However, for advanced effects, you might need additional DSP libraries, as Novocaine focuses on I/O abstraction rather than built-in effects.

Why do I need headphones for play-through examples?

The README warns that without headphones, microphone and speaker proximity can cause feedback. This is a practical audio issue, not a library flaw, but it highlights real-world usage considerations.

Open-Awesome

novocaine

MITObjective-C

A painless, high-performance audio library for iOS and macOS using Audio Units with simple APIs.

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2.2k stars269 forks0 contributors

What is novocaine?

Novocaine is an open-source audio library for iOS and macOS that simplifies high-performance audio input and output using Audio Units. It solves the pain of dealing with complex, low-level Core Audio APIs by providing straightforward block-based interfaces for capturing and playing audio in real-time.

Target Audience

iOS and macOS developers building audio-intensive applications like music apps, audio analyzers, or real-time sound processors who need reliable, low-latency audio without deep Core Audio expertise.

Value Proposition

Developers choose Novocaine because it dramatically reduces the time and effort required to implement audio features, offering a battle-tested solution derived from commercial apps with a focus on performance and ease of use.

Overview

Painless high-performance audio on iOS and Mac OS X

Use Cases

Best For

Building iOS or macOS apps that require microphone input with minimal latency
Creating real-time audio playback applications without complex Audio Unit setup
Developing audio analysis tools like spectrum analyzers or oscilloscopes
Prototyping audio features quickly with simple block-based APIs
Learning Core Audio concepts through a simplified, practical library
Integrating high-performance audio into Objective-C or C++ based projects

Not Ideal For

Swift-only iOS projects avoiding Objective-C and C++ interoperability
Cross-platform audio applications targeting Android or web in addition to Apple platforms
Advanced audio processing requiring custom Audio Unit graphs beyond Novocaine's abstractions

Pros & Cons

Pros

Simple Block API

Uses callback blocks for audio input and output, allowing developers to capture and play audio with minimal code, as shown in the README examples with just a few lines.

High-Performance Engine

Incorporates a C++ RingBuffer for efficient, low-latency processing, optimized over three years of development to handle real-time audio smoothly.

Proven in Production

Powers commercial apps like Octave and Fourier, demonstrating reliability and robustness in audio-intensive applications, as highlighted in the README.

Cons

C++ File Extension Requirement

Requires changing Objective-C files to .mm when using the RingBuffer, adding complexity and potential build issues for projects not set up for C++ interoperability.

Limited to Core Audio Abstraction

Abstracts away Core Audio details, which can be a limitation for developers needing advanced control or custom Audio Unit configurations not exposed by the library.

No Native Swift Support

Designed primarily for Objective-C, making it less straightforward for Swift-based projects without bridging overhead, as it lacks modern Swift APIs or documentation.

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