Generate & Stream

import com.kugelaudio.sdk.GenerateRequest;
import com.kugelaudio.sdk.AudioResponse;

AudioResponse audio = client.tts().generate(
    GenerateRequest.builder("Hello, this is a test of the KugelAudio text-to-speech system.")
        .modelId("kugel-3")        // Canonical production model (see /models)
        .voiceId(1071)             // Required for successful synthesis
        .cfgScale(2.0)             // Guidance scale (1.2-2.5)
        .temperature(0.5)          // Sampling variance 0.0-1.0 (omit for server default)
        .maxNewTokens(2048)
        .sampleRate(24000)
        .normalize(true)           // Enable text normalization (default)
        .language("en")            // Language for normalization (see below)
        .wordTimestamps(false)
        .speed(1.0)                // Playback speed 0.8-1.2 (pitch-preserving WSOLA)
        .build()
);

// Audio properties
System.out.printf("Duration: %.2fms%n", audio.getDurationMs());
System.out.println("Samples: " + audio.getTotalSamples());
System.out.println("Sample rate: " + audio.getSampleRate() + " Hz");
System.out.printf("Generation time: %.0fms%n", audio.getGenerationMs());
System.out.printf("RTF: %.2f%n", audio.getRtf());

// Save to WAV file
audio.saveWav(java.nio.file.Path.of("output.wav"));

// Get raw PCM16 bytes (signed 16-bit little-endian, mono)
byte[] pcmData = audio.getAudio();

// Get WAV bytes with header (in-memory)
byte[] wavBytes = audio.toWavBytes();

// Get normalised float samples [-1.0, 1.0]
float[] floatData = audio.toFloat32();

import com.kugelaudio.sdk.GenerateRequest;
import com.kugelaudio.sdk.StreamCallbacks;
import com.kugelaudio.sdk.AudioChunk;

client.tts().stream(
    GenerateRequest.builder("Hello, this is streaming audio.")
        .modelId("kugel-3")
        .voiceId(1071)
        .language("en")
        .build(),
    new StreamCallbacks() {
        @Override
        public void onChunk(AudioChunk chunk) {
            System.out.printf("Chunk %d: %d bytes, %d samples%n",
                chunk.getIndex(), chunk.getAudio().length, chunk.getSamples());
            // playAudio(chunk.getAudio());
        }

        @Override
        public void onComplete(AudioResponse response) {
            System.out.printf("Total duration: %.0fms%n", response.getDurationMs());
            System.out.printf("Generation time: %.0fms%n", response.getGenerationMs());
        }

        @Override
        public void onError(com.kugelaudio.sdk.KugelAudioException error) {
            System.err.println("TTS error: " + error.getMessage());
        }
    }
);

AudioResponse audio = client.tts().generate(
    GenerateRequest.builder("I bought 3 items for €50.99 on 01/15/2024.")
        .voiceId(1071)
        .normalize(true)
        .language("en")
        .build()
);

import com.kugelaudio.sdk.WordTimestamp;

AudioResponse audio = client.tts().generate(
    GenerateRequest.builder("Hello, how are you today?")
        .modelId("kugel-3")
        .voiceId(1071)
        .language("en")
        .wordTimestamps(true)
        .build()
);

for (WordTimestamp ts : audio.getWordTimestamps()) {
    System.out.printf("%s: %dms - %dms (score: %.2f)%n",
        ts.getWord(), ts.getStartMs(), ts.getEndMs(), ts.getScore());
}
// Hello: 0ms - 320ms (score: 1.00)
// how: 350ms - 480ms (score: 1.00)

client.tts().stream(
    GenerateRequest.builder("Hello, how are you today?")
        .modelId("kugel-3")
        .voiceId(1071)
        .language("en")
        .wordTimestamps(true)
        .build(),
    new StreamCallbacks() {
        @Override
        public void onChunk(AudioChunk chunk) {
            playAudio(chunk.getAudio());
        }

        @Override
        public void onWordTimestamps(java.util.List<WordTimestamp> timestamps) {
            for (WordTimestamp ts : timestamps) {
                System.out.printf("%s: %dms-%dms%n",
                    ts.getWord(), ts.getStartMs(), ts.getEndMs());
            }
        }
    }
);

import com.kugelaudio.sdk.Model;
import java.util.List;

List<Model> models = client.models().list();

for (Model model : models) {
    System.out.println(model.getId() + ": " + model.getName());
    System.out.println("  Description: " + model.getDescription());
    System.out.println("  Max Input: " + model.getMaxInputLength() + " characters");
    System.out.println("  Sample Rate: " + model.getSampleRate() + " Hz");
}

import com.kugelaudio.sdk.*;

try {
    AudioResponse audio = client.tts().generate(
        GenerateRequest.builder("Hello!").voiceId(1071).language("en").build()
    );
} catch (AuthenticationException e) {
    System.err.println("Invalid API key");
} catch (RateLimitException e) {
    System.err.println("Rate limit exceeded, please wait");
} catch (InsufficientCreditsException e) {
    System.err.println("Not enough credits, please top up");
} catch (ValidationException e) {
    System.err.println("Invalid request: " + e.getMessage());
} catch (ConnectionException e) {
    System.err.println("Failed to connect to server");
} catch (KugelAudioException e) {
    System.err.println("API error: " + e.getMessage());
}