<dependency>
    <groupId>com.google.cloud</groupId>
    <artifactId>google-cloud-speech</artifactId>
    <version>0.80.0-beta</version>
</dependency>

String jsonFilePath = System.getProperty("user.dir") + "/serviceaccount.json";
FileInputStream credentialsStream = new FileInputStream(jsonFilePath);
GoogleCredentials credentials = GoogleCredentials.fromStream(credentialsStream);
FixedCredentialsProvider credentialsProvider = FixedCredentialsProvider.create(credentials);

SpeechSettings speechSettings =
        SpeechSettings.newBuilder()
            .setCredentialsProvider(credentialsProvider)
            .build();

SpeechClient speechClient = SpeechClient.create(speechSettings);

//SpeechClient speechClient = SpeechClient.create();

// The path to the audio file to transcribe
String fileName = System.getProperty("user.dir") + "/call-recording-790.opus";

// Reads the audio file into memory
Path path = Paths.get(fileName);
byte[] data = Files.readAllBytes(path);
ByteString audioBytes = ByteString.copyFrom(data);

System.out.println(path.toAbsolutePath());

// Builds the sync recognize request
RecognitionConfig config = RecognitionConfig.newBuilder().setEncoding(AudioEncoding.LINEAR16)
        .setSampleRateHertz(8000).setLanguageCode("en-US").build();

RecognitionAudio audio = RecognitionAudio.newBuilder().setContent(audioBytes).build();

System.out.println("recognize builder");

// Performs speech recognition on the audio file
RecognizeResponse response = speechClient.recognize(config, audio);
List<SpeechRecognitionResult> results = response.getResultsList();

System.out.println(results.size()); // ***** HERE 0

for (SpeechRecognitionResult result : results) {

    System.out.println(result.toString());

    // There can be several alternative transcripts for a given chunk of speech.
    // Just use the
    // first (most likely) one here.
    SpeechRecognitionAlternative alternative = result.getAlternativesList().get(0);
    System.out.printf("Transcription: %s%n", alternative.getTranscript());
}