Classes The following classes are available globally. ChirpSDK The main Chirp SDK class. Use this to send and receive data using sound. Only one single instance should be instantiated per application. See more Declaration Objective-C @interface ChirpSDK : NSObject Swift class ChirpSDK : NSObject © 2019 Asio Ltd. All rights reserved. (Last updated: 2019-09-12) Generated by jazzy ♪♫ v0.9.4, a Realm project.