code: function float32 (arr) {
  	if (arr.length) {
  		if (arr instanceof Float32Array) return arr
  		var float = new Float32Array(arr)
  		float.set(arr)
  		return float
  	}
  
  	// number
  	narr[0] = arr
  	return narr[0]
  }
docs: make sure data is float32 array