spencold:

Perhaps it's allocating a buffer internally, and not shrinking it when you load a new sound. Do you get the remains of the first track after the second track plays? (Might be easier to tell if you play a song and then load your track.) If that's the case, it might lead you to a bugfix. Or perhaps load an appropriately long empty file (i.e. silence) before loading your tracks to work around the problem

Finally, the docs show a Play(from, to) method. You might just use that method to play only the track you just loaded/created. It also shows a Reset() method. Perhaps the pointer in the device isn't being reset, so it's loading data into the wrong part of the buffer?

...roboticus

When your only tool is a hammer, all problems look like your thumb.