func CloseDevice() error {
al.DeleteBuffers(hwa.buf.bufs)
al.DeleteSources(hwa.source)
al.CloseDevice()
hwa = nil
return nil
}
// DestroyKey cleans up any resources for the key when destorying the key.
func (k *PianoKey) DestroyKey(glctx gl.Context) {
glctx.DeleteBuffer(k.glBuf)
al.DeleteSources(k.soundSources...)
al.DeleteBuffers(k.soundBuffers)
al.CloseDevice()
}