Sinusoid releases Sonocord 1.4 - An Audio Sonogram App for Birders Posted 2/08/2016 at 19:15 UTC in iOS by firstname.lastname@example.org | Permalink | Tweet Sydney based Sinusoid Pty Ltd today announces Sonocord 1.4 for iOS. Sonocord is a app for birders and birdwatchers that can record short audio tracks, edit them, and display the sonogram of the audio. Large numbers of calls and songs can be stored on an iOS device & viewed as a sonogram immediately or reviewed at a later time. Sonograms are used for identifying birds by their calls and song. New in Version 1.4 is the ability to play the track within the track listing, as well as other features.