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qualcomm/
MeloTTS-EN

Name: MeloTTS-EN
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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™ IQ-8275	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:

Max decoded sequence length: 512 tokens
Model checkpoint: myshell-ai/MeloTTS-English
Model size (bert_wrapper) (float): 360 MB
Model size (decoder) (float): 55.5 MB
Model size (encoder) (float): 31.8 MB
Model size (flow) (float): 76.9 MB
Model size (t5_decoder) (float): 21.8 MB
Model size (t5_encoder) (float): 57.5 MB
Number of parameters (bert_wrapper): 94.5M
Number of parameters (decoder): 14.5M
Number of parameters (encoder): 8.30M
Number of parameters (flow): 20.1M
Number of parameters (t5_decoder): 5.72M
Number of parameters (t5_encoder): 15.1M

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	3.277 ms	0 - 0 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Snapdragon® X Elite	7.675 ms	0 - 0 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Snapdragon® 8 Gen 3 Mobile	5.045 ms	0 - 7 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	9.989 ms	0 - 3 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	30.638 ms	0 - 8 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	7.087 ms	0 - 1 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® SA8775P	9.307 ms	0 - 10 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® SA8650P	9.307 ms	0 - 10 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® SA8255P	9.307 ms	0 - 10 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-9075	9.03 ms	0 - 2 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-X7181	7.675 ms	0 - 0 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ Q-8750	3.342 ms	0 - 10 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Qualcomm® SA7255P	30.638 ms	0 - 8 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Mobile	3.342 ms	0 - 10 MB	NPU
bert_wrapper	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Gen 5 Mobile	2.692 ms	0 - 8 MB	NPU
decoder	VOICE_AI	mixed_with_float	Snapdragon® X2 Elite	40.913 ms	1 - 1 MB	NPU
decoder	VOICE_AI	mixed_with_float	Snapdragon® X Elite	82.89 ms	1 - 1 MB	NPU
decoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Gen 3 Mobile	61.413 ms	2 - 10 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	74.675 ms	0 - 2 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	134.776 ms	0 - 9 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	85.463 ms	1 - 2 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® SA8775P	83.864 ms	0 - 10 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® SA8650P	83.864 ms	0 - 10 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® SA8255P	83.864 ms	0 - 10 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-9075	82.773 ms	0 - 2 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-X7181	82.89 ms	1 - 1 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ Q-8750	48.352 ms	0 - 9 MB	NPU
decoder	VOICE_AI	mixed_with_float	Qualcomm® SA7255P	134.776 ms	0 - 9 MB	NPU
decoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Mobile	48.352 ms	0 - 9 MB	NPU
decoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Gen 5 Mobile	42.475 ms	0 - 8 MB	NPU
encoder	VOICE_AI	mixed_with_float	Snapdragon® X2 Elite	25.55 ms	4 - 4 MB	NPU
encoder	VOICE_AI	mixed_with_float	Snapdragon® X Elite	40.352 ms	4 - 4 MB	NPU
encoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Gen 3 Mobile	30.942 ms	4 - 11 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	39.203 ms	4 - 10 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	66.673 ms	2 - 11 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	41.72 ms	4 - 5 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® SA8775P	43.176 ms	2 - 11 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® SA8650P	43.176 ms	2 - 11 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® SA8255P	43.176 ms	2 - 11 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-9075	43.431 ms	6 - 11 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-X7181	40.352 ms	4 - 4 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ Q-8750	25.549 ms	2 - 16 MB	NPU
encoder	VOICE_AI	mixed_with_float	Qualcomm® SA7255P	66.673 ms	2 - 11 MB	NPU
encoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Mobile	25.549 ms	2 - 16 MB	NPU
encoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Gen 5 Mobile	23.823 ms	2 - 10 MB	NPU
flow	VOICE_AI	mixed_with_float	Snapdragon® X2 Elite	67.489 ms	2 - 2 MB	NPU
flow	VOICE_AI	mixed_with_float	Snapdragon® X Elite	129.112 ms	2 - 2 MB	NPU
flow	VOICE_AI	mixed_with_float	Snapdragon® 8 Gen 3 Mobile	99.741 ms	2 - 9 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	122.593 ms	2 - 6 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	245.704 ms	2 - 11 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	132.518 ms	3 - 4 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® SA8775P	128.629 ms	2 - 12 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® SA8650P	128.629 ms	2 - 12 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® SA8255P	128.629 ms	2 - 12 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-9075	127.445 ms	1 - 5 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-X7181	129.112 ms	2 - 2 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ Q-8750	82.32 ms	2 - 11 MB	NPU
flow	VOICE_AI	mixed_with_float	Qualcomm® SA7255P	245.704 ms	2 - 11 MB	NPU
flow	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Mobile	82.32 ms	2 - 11 MB	NPU
flow	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Gen 5 Mobile	71.111 ms	2 - 12 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Snapdragon® X2 Elite	0.328 ms	1 - 1 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Snapdragon® X Elite	0.414 ms	1 - 1 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Gen 3 Mobile	0.307 ms	0 - 7 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	0.58 ms	1 - 3 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	1.001 ms	0 - 9 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	0.396 ms	1 - 2 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® SA8775P	0.657 ms	0 - 5 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® SA8650P	0.657 ms	0 - 5 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® SA8255P	0.657 ms	0 - 5 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-9075	0.515 ms	3 - 5 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-X7181	0.414 ms	1 - 1 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ Q-8750	0.276 ms	0 - 9 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Qualcomm® SA7255P	1.001 ms	0 - 9 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Mobile	0.276 ms	0 - 9 MB	NPU
t5_decoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Gen 5 Mobile	0.26 ms	0 - 10 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Snapdragon® X2 Elite	0.629 ms	0 - 0 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Snapdragon® X Elite	1.047 ms	0 - 0 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Gen 3 Mobile	0.639 ms	0 - 8 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	1.082 ms	0 - 2 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-8275	2.776 ms	0 - 8 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	0.894 ms	0 - 3 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® SA8775P	1.264 ms	0 - 10 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® SA8650P	1.264 ms	0 - 10 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® SA8255P	1.264 ms	0 - 10 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-9075	1.126 ms	0 - 2 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ IQ-X7181	1.047 ms	0 - 0 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® Dragonwing™ Q-8750	0.523 ms	0 - 9 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Qualcomm® SA7255P	2.776 ms	0 - 8 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Mobile	0.523 ms	0 - 9 MB	NPU
t5_encoder	VOICE_AI	mixed_with_float	Snapdragon® 8 Elite Gen 5 Mobile	0.489 ms	0 - 9 MB	NPU

License

The license for the original implementation of MeloTTS-EN can be found here.

References

Community

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qualcomm/MeloTTS-EN