Added bowedString presets to preset playground
Added bowedString presets to preset playground

msdgwzhy6/AudioKit,UIKit0/AudioKit,audiokit/AudioKitArchive,dotty2883/AudioKit,sgrady2/AudioKit,benzguo/AudioKit,benzguo/AudioKit,sgrady2/AudioKit,UIKit0/AudioKit,jackywpy/AudioKit,audiokit/AudioKitArchive,UIKit0/AudioKit,dotty2883/AudioKit,msdgwzhy6/AudioKit,jackywpy/AudioKit,midroid/AudioKit,audiokit/AudioKitArchive,UIKit0/AudioKit,sgrady2/AudioKit,sgrady2/AudioKit,jackywpy/AudioKit,jackywpy/AudioKit,dotty2883/AudioKit,midroid/AudioKit,sgrady2/AudioKit,audiokit/AudioKitArchive,dotty2883/AudioKit,audiokit/AudioKitArchive,jackywpy/AudioKit,benzguo/AudioKit,benzguo/AudioKit,UIKit0/AudioKit,msdgwzhy6/AudioKit,benzguo/AudioKit,midroid/AudioKit,midroid/AudioKit,msdgwzhy6/AudioKit,msdgwzhy6/AudioKit,midroid/AudioKit,dotty2883/AudioKit