Issue trying to play two audio files synchronously and change the current time

[sterudatadriven]

I'm trying to make a simple C# WinForms app, based on NAudio, that allows me to play two perfectly synchronized audio files (two tracks with same duration played in unison: Basically, they should both start from the beginning at same time and end in the end together)

I also need to manipulate volume (individually, for each track) and playback position (one single control, like a button which, once clicked, makes the two tracks go forward 10 seconds, but always in unison) during playback

Everything seems to work fine, but when I programmatically change playback position, the two tracks get out of phase a little bit (with each new iteration, it gets worse)

Here's the thread opened on stackoverflow in which I highlight used code:
https://stackoverflow.com/questions/76525471/two-audio-synchronous-playback-and-change-currenttime
I also tried the solution proposed by Ryan McDonough but without any success

Thanks in advance for your attention

[markheath]

For playing audio files synchronized I would recommend mixing them in software (e.g. using the MixingSampleProvider) and only opening one instance of the sound card. This would allow you to control the repositioning of the source files. I usually end up making my own custom class to manage this and ensure that repositions happen outside of calls to the Read method