I am currently trying to implement an audio playing feature to an app that my group is working on.
As Can be seen in the image the app displays a spectrogram of 4 different recodings. I am trying to add a feature in which the user could hear each of these recordings.
I already can play the recordings. My main problem is an algorithm for a progress bar (I am not sure if this is what its called). The image below shows an example of what I am talking about.
Can anyone please guide me through how to develop this bar and show me a simple code? Or refer me to an example?