MeloTTS-EN: Optimized for Qualcomm Devices
MeloTTS is a high-quality multi-lingual text-to-speech library for English, Chinese and Spanish language.
This is based on the implementation of MeloTTS-EN found here. This repository contains pre-exported model files optimized for Qualcomm® devices. You can use the Qualcomm® AI Hub Models library to export with custom configurations. More details on model performance across various devices, can be found here.
Qualcomm AI Hub Models uses Qualcomm AI Hub Workbench to compile, profile, and evaluate this model. Sign up to run these models on a hosted Qualcomm® device.
Deploying MeloTTS-EN on-device
This model is compatible with the Qualcomm Voice AI SDK. Download the SDK from the Qualcomm Package Manager to deploy this model on-device.
Getting Started
There are two ways to deploy this model on your device:
Option 1: Download Pre-Exported Models
Below are pre-exported model assets ready for deployment.
| Runtime | Precision | Chipset | SDK Versions | Download |
|---|---|---|---|---|
| VOICE_AI | mixed_with_float | Snapdragon® X2 Elite | QAIRT 2.45 | Download |
| VOICE_AI | mixed_with_float | Snapdragon® X Elite | QAIRT 2.45 | Download |
| VOICE_AI | mixed_with_float | Snapdragon® 8 Gen 3 Mobile | QAIRT 2.45 | Download |
| VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | QAIRT 2.45 | Download |
| VOICE_AI | mixed_with_float | Qualcomm® SA8775P | QAIRT 2.45 | Download |
| VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-9075 | QAIRT 2.45 | Download |
| VOICE_AI | mixed_with_float | Qualcomm® SA7255P | QAIRT 2.45 | Download |
| VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Mobile | QAIRT 2.45 | Download |
| VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Gen 5 Mobile | QAIRT 2.45 | Download |
For more device-specific assets and performance metrics, visit MeloTTS-EN on Qualcomm® AI Hub.
Option 2: Export with Custom Configurations
Use the Qualcomm® AI Hub Models Python library to compile and export the model with your own:
- Custom weights (e.g., fine-tuned checkpoints)
- Custom input shapes
- Target device and runtime configurations
This option is ideal if you need to customize the model beyond the default configuration provided here.
See our repository for MeloTTS-EN on GitHub for usage instructions.
Model Details
Model Type: Model_use_case.audio_generation
Model Stats:
- Model checkpoint: myshell-ai/MeloTTS-English
- Max decoded sequence length: 512 tokens
- Number of parameters (encoder): 8.30M
- Model size (encoder) (float): 31.8 MB
- Number of parameters (flow): 20.1M
- Model size (flow) (float): 76.9 MB
- Number of parameters (decoder): 14.5M
- Model size (decoder) (float): 55.5 MB
- Number of parameters (bert_wrapper): 94.5M
- Model size (bert_wrapper) (float): 360 MB
- Number of parameters (t5_encoder): 15.1M
- Model size (t5_encoder) (float): 57.5 MB
- Number of parameters (t5_decoder): 5.72M
- Model size (t5_decoder) (float): 21.8 MB
Performance Summary
| Model | Runtime | Precision | Chipset | Inference Time (ms) | Peak Memory Range (MB) | Primary Compute Unit |
|---|---|---|---|---|---|---|
| bert_wrapper | VOICE_AI | mixed_with_float | Snapdragon® X2 Elite | 3.258 ms | 0 - 0 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Snapdragon® X Elite | 7.705 ms | 0 - 0 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Snapdragon® 8 Gen 3 Mobile | 5.028 ms | 0 - 8 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8275 | 30.638 ms | 0 - 10 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 7.088 ms | 0 - 2 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® SA8775P | 9.268 ms | 0 - 10 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® SA8650P | 9.268 ms | 0 - 10 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® SA8255P | 9.268 ms | 0 - 10 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-9075 | 9.028 ms | 0 - 2 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-X7181 | 7.705 ms | 0 - 0 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ Q-8750 | 3.32 ms | 0 - 9 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Qualcomm® SA7255P | 30.638 ms | 0 - 10 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Mobile | 3.32 ms | 0 - 9 MB | NPU |
| bert_wrapper | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Gen 5 Mobile | 2.691 ms | 0 - 9 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Snapdragon® X2 Elite | 41.382 ms | 1 - 1 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Snapdragon® X Elite | 82.62 ms | 1 - 1 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Gen 3 Mobile | 60.914 ms | 0 - 8 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8275 | 134.968 ms | 0 - 10 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 84.658 ms | 1 - 2 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® SA8775P | 83.784 ms | 0 - 10 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® SA8650P | 83.784 ms | 0 - 10 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® SA8255P | 83.784 ms | 0 - 10 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-9075 | 82.746 ms | 0 - 2 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-X7181 | 82.62 ms | 1 - 1 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ Q-8750 | 48.152 ms | 0 - 13 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Qualcomm® SA7255P | 134.968 ms | 0 - 10 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Mobile | 48.152 ms | 0 - 13 MB | NPU |
| decoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Gen 5 Mobile | 42.419 ms | 0 - 8 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Snapdragon® X2 Elite | 25.331 ms | 4 - 4 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Snapdragon® X Elite | 40.349 ms | 4 - 4 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Gen 3 Mobile | 30.104 ms | 4 - 11 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8275 | 66.529 ms | 2 - 11 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 40.686 ms | 4 - 5 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® SA8775P | 43.34 ms | 1 - 7 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® SA8650P | 43.34 ms | 1 - 7 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® SA8255P | 43.34 ms | 1 - 7 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-9075 | 42.825 ms | 4 - 9 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-X7181 | 40.349 ms | 4 - 4 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ Q-8750 | 24.707 ms | 2 - 10 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Qualcomm® SA7255P | 66.529 ms | 2 - 11 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Mobile | 24.707 ms | 2 - 10 MB | NPU |
| encoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Gen 5 Mobile | 23.839 ms | 2 - 11 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Snapdragon® X2 Elite | 67.589 ms | 2 - 2 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Snapdragon® X Elite | 129.768 ms | 2 - 2 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Snapdragon® 8 Gen 3 Mobile | 98.178 ms | 2 - 10 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8275 | 245.488 ms | 2 - 11 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 131.12 ms | 3 - 4 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® SA8775P | 128.654 ms | 2 - 12 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® SA8650P | 128.654 ms | 2 - 12 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® SA8255P | 128.654 ms | 2 - 12 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-9075 | 127.408 ms | 1 - 5 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-X7181 | 129.768 ms | 2 - 2 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ Q-8750 | 82.501 ms | 2 - 12 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Qualcomm® SA7255P | 245.488 ms | 2 - 11 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Mobile | 82.501 ms | 2 - 12 MB | NPU |
| flow | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Gen 5 Mobile | 71.147 ms | 2 - 11 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Snapdragon® X2 Elite | 0.308 ms | 1 - 1 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Snapdragon® X Elite | 0.436 ms | 1 - 1 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Gen 3 Mobile | 0.301 ms | 0 - 7 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8275 | 0.988 ms | 0 - 9 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 0.421 ms | 0 - 2 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® SA8775P | 0.661 ms | 0 - 10 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® SA8650P | 0.661 ms | 0 - 10 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® SA8255P | 0.661 ms | 0 - 10 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-9075 | 0.518 ms | 1 - 3 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-X7181 | 0.436 ms | 1 - 1 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ Q-8750 | 0.297 ms | 0 - 13 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Qualcomm® SA7255P | 0.988 ms | 0 - 9 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Mobile | 0.297 ms | 0 - 13 MB | NPU |
| t5_decoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Gen 5 Mobile | 0.26 ms | 0 - 9 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Snapdragon® X2 Elite | 0.623 ms | 0 - 0 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Snapdragon® X Elite | 1.06 ms | 0 - 0 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Gen 3 Mobile | 0.634 ms | 0 - 8 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8275 | 2.772 ms | 0 - 8 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 0.898 ms | 0 - 1 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® SA8775P | 1.265 ms | 0 - 10 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® SA8650P | 1.265 ms | 0 - 10 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® SA8255P | 1.265 ms | 0 - 10 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-9075 | 1.4 ms | 2 - 4 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ IQ-X7181 | 1.06 ms | 0 - 0 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® Dragonwing™ Q-8750 | 0.521 ms | 0 - 9 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Qualcomm® SA7255P | 2.772 ms | 0 - 8 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Mobile | 0.521 ms | 0 - 9 MB | NPU |
| t5_encoder | VOICE_AI | mixed_with_float | Snapdragon® 8 Elite Gen 5 Mobile | 0.486 ms | 0 - 9 MB | NPU |
License
- The license for the original implementation of MeloTTS-EN can be found here.
References
Community
- Join our AI Hub Slack community to collaborate, post questions and learn more about on-device AI.
- For questions or feedback please reach out to us.
