If your HeadSet Button works wrong in PowerAmp, especially long click, double click, this app can help you to implement voice control popular player PowerAmp:
-play/pause
-track next/prev
-album next/prev
-shuffle on/off
There are also additional features:
-control volume
-says current time
First, try this demo free version.
You can create and clean voice commands as you want.
Added feature only in pro version: Not need to say command for recognizing, instead You can click once after "beep". Voice commands will be announced. Click once you hear the command you want.