As mentioned in a 2013 post

There are a few things that need to be addressed...

1. If you change the volume (in the app) on any sound, it will distort. I have to set the volume to full, then restart the app.
This is quite evident with the patch Warm Pad 5.

This was asked about in 2013?!?, and it took me 10 min to figure out?

2. The volume levels of each instrument varies. They should be the same unless you adjust the volume within the app.

3. Lastly, it keeps telling me that all sounds are not available, to which I have to restore purchases every time I open the app.

Otherwise...(and these are big issues), it sounds good.

iPhone 6, iOS 9.2

ongiantsshoulders about SampleTank