Is there any plugin that support fade in and out in Flutter - flutter

Question

I am working with the flutter_sound in Flutter. I simply want to fade in and fade out sound file in flutter

Answer 1

I have created a method that allows you to fade in or fade out.
If you want to fade you must enter this:
3 seconds to increase the volume from 0.0 to 1.0.
Fade in:
fade (1.0, 0.0, 3 * 1000);
Fade out:
fade (0.0, 1.0, 3 * 1000);
If it works for you, don't forget to rate my answer, regards.
void fade( double to, double from, int len ) {
double vol = from;
double diff = to - from;
double steps = (diff / 0.01).abs() ;
int stepLen = Math.max(4, (steps > 0) ? len ~/ steps : len);
int lastTick = DateTime.now().millisecondsSinceEpoch ;
// // Update the volume value on each interval ticks
Timer.periodic(new Duration(milliseconds: stepLen), ( Timer t ) {
var now = DateTime.now().millisecondsSinceEpoch;
var tick = (now - lastTick) / len;
lastTick = now;
vol += diff * tick;
vol = Math.max(0, vol);
vol = Math.min(1, vol);
vol = (vol * 100).round() / 100;
player.setVolume(vol); // change this
if ( (to < from && vol <= to) || (to > from && vol >= to) ) {
if (t != null) {
t.cancel() ;
t = null;
}
player.setVolume(vol); // change this
}
});
}