According the specification of Clip.open:

     * @throws IllegalArgumentException if the buffer size does not represent an
     * integral number of sample frames, or if {@code format} is not
     * fully specified or invalid
     */
    void open(AudioFormat format, byte[] data, int offset, int bufferSize)

We have two implementations of the Clip.
 - SoftMixingClip - exception is thrown
 - DirectAudioDevice - exception is not thrown