SiriWave | The Apple Siri wave-form replicated in a Swift library | iOS library

I apologize if my use of terminology is inaccurate. I'm a novice.

I have a long list of variables that are being shared/used by the function loop(). I am currently only calling loop() twice and only passing unique arguments for the sound file link. I am going to scale this code up so that I will have many calls to loop() but each with a unique set of arguments replacing my long shared list of variables. I think it will be a bit messy and confusing to have a long list of unique arguments for each call to loop(). Is there a way that I can keep things readable and organized by making different variable lists that can only be accessed by the parameters for a specific call to loop()? Something like this pseudocode:

I am trying to implement the seek() function using howler.js, but I can't figure out how to implement it. I'm a novice javascript programmer, so it's probably something simple, but I can't find any useful examples elsewhere. My code works as expected otherwise, I just want to add the ability to start the audio playing at times other than the beginning. For example, when a sound starts, it might begin at four seconds in instead of 0. sound.seek([300], id2); is what I'm trying to implement below.