@Test
    public void testAmazonTranscribeUnknownAudio_enAU() throws Exception {
        String file = "en-AU_(A_Little_Bottle_Of_Water).mp3";
        String expected = "A little bottle of water";
        String xml = getXML(file, PARSER).xml;
        assertContains(expected, xml);
    }
Tests transcribe with an audio file without passing in the source language.
The source language of the file is en-AU (English - Australian)
tika-parsers/tika-parsers-ml/tika-transcribe-aws/src/test/java/org/apache/tika/parser/transcribe/aws/AmazonTranscribeTest.java