I know for a fact this problem originates from the SDK. Anyway, whenever I open the Chroma Visualizer, my keyboard goes black (sometimes flashes random colors when no sound is playing) and my computer no longer has any sound, if I go to the playback devices and right click on my astros and click "test" it says "failed to play test tone", then when I close the visualizer, my keyboard goes back to spectrum cycling, and sound returns, I had this problem when I first got my keyboard Monday, fixed it on the first day by installing the SDK Core 1.4.1, then the problem returned yesterday or the day before yesterday. I haven't installed anything new, changed anything, nothing, I make sure to close synapse before opening the visualizer, my synapse is up to date. I have no idea what the problem is. *EDIT* I forgot to add that at the bottom of the visualizer program there's a link to the creators github and it says "update to SDK 1.5.1, but I cannot find it. I don't know if that's the problem or if that's for different devices.