https://developer.apple.com/documentation/coreaudiotypes/kaudiochannellabel_clicktrack?language=objc
kAudioChannelLabel_ClickTrack | Apple Developer Documentation
Click track channel.
apple developerclicktrackdocumentation
https://www.clicktrack.no/
ClickTrack - ClickTrack
clicktrack
https://play.google.com/store/apps/details?id=com.awebcode.metropro
Clicktrack - Apps on Google Play
Metronome app with sounds that can be used for all levels of playing.
on googleclicktrackappsplay