code: func (w *Writer) WriteSample(sample []byte) error {
  	if len(sample)*8 != int(w.options.SignificantBits) {
  		return fmt.Errorf("incorrect Sample Length %d", len(sample))
  	}
  
  	n, err := w.sampleBuf.Write(sample)
  	if err != nil {
  		return err
  	}
  
  	w.bytesWritten += n
  
  	return nil
  }
docs: // WriteSample writes a []byte array to file without conversion