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PiperTTS-EN

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PiperTTS-EN: Optimized for Qualcomm Devices

PiperTTS is a high-quality multi-lingual text-to-speech library.

This is based on the implementation of PiperTTS-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.

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	float	Snapdragon® X2 Elite	QAIRT 2.45	Download
VOICE_AI	float	Snapdragon® X Elite	QAIRT 2.45	Download
VOICE_AI	float	Snapdragon® 8 Gen 3 Mobile	QAIRT 2.45	Download
VOICE_AI	float	Snapdragon® 8 Gen 1 Mobile	QAIRT 2.45	Download
VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	QAIRT 2.45	Download
VOICE_AI	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	QAIRT 2.45	Download
VOICE_AI	float	Qualcomm® SA8775P	QAIRT 2.45	Download
VOICE_AI	float	Qualcomm® Dragonwing™ IQ-9075	QAIRT 2.45	Download
VOICE_AI	float	Qualcomm® SA7255P	QAIRT 2.45	Download
VOICE_AI	float	Qualcomm® SA8295P	QAIRT 2.45	Download
VOICE_AI	float	Snapdragon® 8 Elite Mobile	QAIRT 2.45	Download
VOICE_AI	float	Snapdragon® 8 Elite Gen 5 Mobile	QAIRT 2.45	Download

For more device-specific assets and performance metrics, visit PiperTTS-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 PiperTTS-EN on GitHub for usage instructions.

Model Details

Model Type: Model_use_case.audio_generation

Model Stats:

Max decoded sequence length: 64 tokens
Model checkpoint: rhasspy/piper-checkpoints
Model size (decoder) (float): 6.37 MB
Model size (encoder) (float): 28.7 MB
Model size (flow) (float): 28.2 MB
Model size (sdp) (float): 6.61 KB
Model size (t5_decoder) (float): 21.8 MB
Model size (t5_encoder) (float): 57.5 MB
Number of parameters (decoder): 1.66M
Number of parameters (encoder): 7.51M
Number of parameters (flow): 7.39M
Number of parameters (sdp): 1.04K
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
charsiu_decoder	VOICE_AI	float	Snapdragon® X2 Elite	0.34 ms	1 - 1 MB	NPU
charsiu_decoder	VOICE_AI	float	Snapdragon® X Elite	0.426 ms	1 - 1 MB	NPU
charsiu_decoder	VOICE_AI	float	Snapdragon® 8 Gen 3 Mobile	0.31 ms	0 - 8 MB	NPU
charsiu_decoder	VOICE_AI	float	Snapdragon® 8 Gen 1 Mobile	0.574 ms	1 - 10 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	0.579 ms	1 - 3 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	0.967 ms	0 - 9 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	0.396 ms	0 - 1 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® SA8775P	0.703 ms	0 - 9 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® SA8650P	0.703 ms	0 - 9 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® SA8255P	0.703 ms	0 - 9 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® QCS8450	0.574 ms	1 - 10 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-9075	0.528 ms	1 - 3 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-X7181	0.426 ms	1 - 1 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® Dragonwing™ Q-8750	0.282 ms	0 - 9 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® SA7255P	0.967 ms	0 - 9 MB	NPU
charsiu_decoder	VOICE_AI	float	Qualcomm® SA8295P	0.803 ms	0 - 6 MB	NPU
charsiu_decoder	VOICE_AI	float	Snapdragon® 8 Elite Mobile	0.282 ms	0 - 9 MB	NPU
charsiu_decoder	VOICE_AI	float	Snapdragon® 8 Elite Gen 5 Mobile	0.261 ms	0 - 10 MB	NPU
charsiu_encoder	VOICE_AI	float	Snapdragon® X2 Elite	0.628 ms	0 - 0 MB	NPU
charsiu_encoder	VOICE_AI	float	Snapdragon® X Elite	1.046 ms	0 - 0 MB	NPU
charsiu_encoder	VOICE_AI	float	Snapdragon® 8 Gen 3 Mobile	0.634 ms	0 - 7 MB	NPU
charsiu_encoder	VOICE_AI	float	Snapdragon® 8 Gen 1 Mobile	1.35 ms	0 - 10 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	1.083 ms	0 - 2 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	2.813 ms	0 - 9 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	0.894 ms	1 - 2 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® SA8775P	1.263 ms	0 - 10 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® SA8650P	1.263 ms	0 - 10 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® SA8255P	1.263 ms	0 - 10 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® QCS8450	1.35 ms	0 - 10 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-9075	1.13 ms	0 - 2 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-X7181	1.046 ms	0 - 0 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® Dragonwing™ Q-8750	0.522 ms	0 - 13 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® SA7255P	2.813 ms	0 - 9 MB	NPU
charsiu_encoder	VOICE_AI	float	Qualcomm® SA8295P	1.731 ms	0 - 6 MB	NPU
charsiu_encoder	VOICE_AI	float	Snapdragon® 8 Elite Mobile	0.522 ms	0 - 13 MB	NPU
charsiu_encoder	VOICE_AI	float	Snapdragon® 8 Elite Gen 5 Mobile	0.489 ms	0 - 13 MB	NPU
decoder	VOICE_AI	float	Snapdragon® X2 Elite	1.727 ms	0 - 0 MB	NPU
decoder	VOICE_AI	float	Snapdragon® X Elite	3.076 ms	0 - 0 MB	NPU
decoder	VOICE_AI	float	Snapdragon® 8 Gen 3 Mobile	2.208 ms	0 - 7 MB	NPU
decoder	VOICE_AI	float	Snapdragon® 8 Gen 1 Mobile	4.371 ms	0 - 9 MB	NPU
decoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	3.421 ms	0 - 2 MB	NPU
decoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	8.073 ms	0 - 9 MB	NPU
decoder	VOICE_AI	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	3.019 ms	0 - 1 MB	NPU
decoder	VOICE_AI	float	Qualcomm® SA8775P	3.48 ms	0 - 10 MB	NPU
decoder	VOICE_AI	float	Qualcomm® SA8650P	3.48 ms	0 - 10 MB	NPU
decoder	VOICE_AI	float	Qualcomm® SA8255P	3.48 ms	0 - 10 MB	NPU
decoder	VOICE_AI	float	Qualcomm® QCS8450	4.371 ms	0 - 9 MB	NPU
decoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-9075	3.344 ms	0 - 2 MB	NPU
decoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-X7181	3.076 ms	0 - 0 MB	NPU
decoder	VOICE_AI	float	Qualcomm® Dragonwing™ Q-8750	1.898 ms	0 - 14 MB	NPU
decoder	VOICE_AI	float	Qualcomm® SA7255P	8.073 ms	0 - 9 MB	NPU
decoder	VOICE_AI	float	Qualcomm® SA8295P	3.988 ms	0 - 6 MB	NPU
decoder	VOICE_AI	float	Snapdragon® 8 Elite Mobile	1.898 ms	0 - 14 MB	NPU
decoder	VOICE_AI	float	Snapdragon® 8 Elite Gen 5 Mobile	1.821 ms	0 - 8 MB	NPU
encoder	VOICE_AI	float	Snapdragon® X2 Elite	18.49 ms	0 - 0 MB	NPU
encoder	VOICE_AI	float	Snapdragon® X Elite	29.735 ms	0 - 0 MB	NPU
encoder	VOICE_AI	float	Snapdragon® 8 Gen 3 Mobile	23.276 ms	0 - 7 MB	NPU
encoder	VOICE_AI	float	Snapdragon® 8 Gen 1 Mobile	38.317 ms	1 - 10 MB	NPU
encoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	29.932 ms	0 - 3 MB	NPU
encoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	47.099 ms	0 - 8 MB	NPU
encoder	VOICE_AI	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	31.525 ms	0 - 2 MB	NPU
encoder	VOICE_AI	float	Qualcomm® SA8775P	32.94 ms	0 - 9 MB	NPU
encoder	VOICE_AI	float	Qualcomm® SA8650P	32.94 ms	0 - 9 MB	NPU
encoder	VOICE_AI	float	Qualcomm® SA8255P	32.94 ms	0 - 9 MB	NPU
encoder	VOICE_AI	float	Qualcomm® QCS8450	38.317 ms	1 - 10 MB	NPU
encoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-9075	32.361 ms	0 - 3 MB	NPU
encoder	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-X7181	29.735 ms	0 - 0 MB	NPU
encoder	VOICE_AI	float	Qualcomm® Dragonwing™ Q-8750	19.332 ms	0 - 13 MB	NPU
encoder	VOICE_AI	float	Qualcomm® SA7255P	47.099 ms	0 - 8 MB	NPU
encoder	VOICE_AI	float	Qualcomm® SA8295P	35.202 ms	0 - 6 MB	NPU
encoder	VOICE_AI	float	Snapdragon® 8 Elite Mobile	19.332 ms	0 - 13 MB	NPU
encoder	VOICE_AI	float	Snapdragon® 8 Elite Gen 5 Mobile	17.048 ms	0 - 8 MB	NPU
flow	VOICE_AI	float	Snapdragon® X2 Elite	9.601 ms	4 - 4 MB	NPU
flow	VOICE_AI	float	Snapdragon® X Elite	15.768 ms	4 - 4 MB	NPU
flow	VOICE_AI	float	Snapdragon® 8 Gen 3 Mobile	11.106 ms	4 - 11 MB	NPU
flow	VOICE_AI	float	Snapdragon® 8 Gen 1 Mobile	18.323 ms	4 - 13 MB	NPU
flow	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	17.557 ms	4 - 11 MB	NPU
flow	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	39.915 ms	1 - 9 MB	NPU
flow	VOICE_AI	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	15.279 ms	4 - 5 MB	NPU
flow	VOICE_AI	float	Qualcomm® SA8775P	17.282 ms	1 - 11 MB	NPU
flow	VOICE_AI	float	Qualcomm® SA8650P	17.282 ms	1 - 11 MB	NPU
flow	VOICE_AI	float	Qualcomm® SA8255P	17.282 ms	1 - 11 MB	NPU
flow	VOICE_AI	float	Qualcomm® QCS8450	18.323 ms	4 - 13 MB	NPU
flow	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-9075	17.276 ms	4 - 10 MB	NPU
flow	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-X7181	15.768 ms	4 - 4 MB	NPU
flow	VOICE_AI	float	Qualcomm® Dragonwing™ Q-8750	8.947 ms	1 - 14 MB	NPU
flow	VOICE_AI	float	Qualcomm® SA7255P	39.915 ms	1 - 9 MB	NPU
flow	VOICE_AI	float	Qualcomm® SA8295P	18.783 ms	0 - 6 MB	NPU
flow	VOICE_AI	float	Snapdragon® 8 Elite Mobile	8.947 ms	1 - 14 MB	NPU
flow	VOICE_AI	float	Snapdragon® 8 Elite Gen 5 Mobile	8.982 ms	3 - 11 MB	NPU
sdp	VOICE_AI	float	Snapdragon® X2 Elite	7.146 ms	0 - 0 MB	NPU
sdp	VOICE_AI	float	Snapdragon® X Elite	11.269 ms	0 - 0 MB	NPU
sdp	VOICE_AI	float	Snapdragon® 8 Gen 3 Mobile	7.699 ms	0 - 7 MB	NPU
sdp	VOICE_AI	float	Snapdragon® 8 Gen 1 Mobile	11.204 ms	0 - 10 MB	NPU
sdp	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	10.375 ms	0 - 3 MB	NPU
sdp	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-8275	20.608 ms	0 - 9 MB	NPU
sdp	VOICE_AI	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	10.378 ms	0 - 2 MB	NPU
sdp	VOICE_AI	float	Qualcomm® SA8775P	11.132 ms	0 - 10 MB	NPU
sdp	VOICE_AI	float	Qualcomm® SA8650P	11.132 ms	0 - 10 MB	NPU
sdp	VOICE_AI	float	Qualcomm® SA8255P	11.132 ms	0 - 10 MB	NPU
sdp	VOICE_AI	float	Qualcomm® QCS8450	11.204 ms	0 - 10 MB	NPU
sdp	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-9075	11.279 ms	2 - 4 MB	NPU
sdp	VOICE_AI	float	Qualcomm® Dragonwing™ IQ-X7181	11.269 ms	0 - 0 MB	NPU
sdp	VOICE_AI	float	Qualcomm® Dragonwing™ Q-8750	6.955 ms	0 - 13 MB	NPU
sdp	VOICE_AI	float	Qualcomm® SA7255P	20.608 ms	0 - 9 MB	NPU
sdp	VOICE_AI	float	Qualcomm® SA8295P	12.667 ms	0 - 6 MB	NPU
sdp	VOICE_AI	float	Snapdragon® 8 Elite Mobile	6.955 ms	0 - 13 MB	NPU
sdp	VOICE_AI	float	Snapdragon® 8 Elite Gen 5 Mobile	6.592 ms	0 - 10 MB	NPU

License

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

References

Community

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qualcomm/PiperTTS-EN