import 'package:flutter/foundation.dart'; class AudioObject { final String title, subtitle, img; const AudioObject(this.title, this.subtitle, this.img); } double valueFromPercentageInRange( {@required final double min, max, percentage}) { return percentage * (max - min) + min; } double percentageFromValueInRange({@required final double min, max, value}) { return (value - min) / (max - min); }