---
library_name: pytorch
license: other
tags:
- real_time
- android
pipeline_tag: text-to-audio

---

![](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/web-assets/model_demo.png)

# PiperTTS-IT: Optimized for Qualcomm Devices

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

This is based on the implementation of PiperTTS-IT found [here](https://github.com/rhasspy/piper).
This repository contains pre-exported model files optimized for Qualcomm® devices. You can use the [Qualcomm® AI Hub Models](https://github.com/qualcomm/ai-hub-models/blob/v0.58.0/src/qai_hub_models/models/pipertts_it) library to export with custom configurations. More details on model performance across various devices, can be found [here](#performance-summary).

Qualcomm AI Hub Models uses [Qualcomm AI Hub Workbench](https://workbench.aihub.qualcomm.com) to compile, profile, and evaluate this model. [Sign up](https://myaccount.qualcomm.com/signup) 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](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_snapdragon_x2_elite.zip)
| VOICE_AI | float | Snapdragon® X Elite | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_snapdragon_x_elite.zip)
| VOICE_AI | float | Snapdragon® 8 Gen 3 Mobile | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_snapdragon_8gen3.zip)
| VOICE_AI | float | Snapdragon® 8 Gen 1 Mobile | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_snapdragon_8gen1.zip)
| VOICE_AI | float | Qualcomm® QCS8275 | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_qcs8275.zip)
| VOICE_AI | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_qcs8550_proxy.zip)
| VOICE_AI | float | Qualcomm® SA8775P | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_sa8775p.zip)
| VOICE_AI | float | Snapdragon® 8 Elite Mobile | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_snapdragon_8_elite_for_galaxy.zip)
| VOICE_AI | float | Snapdragon® 8 Elite Gen 5 Mobile | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_snapdragon_8_elite_gen5_for_galaxy.zip)
| VOICE_AI | float | Qualcomm® SA7255P | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_sa7255p.zip)
| VOICE_AI | float | Qualcomm® SA8295P | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_sa8295p.zip)
| VOICE_AI | float | Qualcomm® Dragonwing™ IQ-9075 | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/pipertts_it/releases/v0.58.0/pipertts_it-voice_ai-float-qualcomm_qcs9075.zip)

For more device-specific assets and performance metrics, visit **[PiperTTS-IT on Qualcomm® AI Hub](https://aihub.qualcomm.com/models/pipertts_it)**.


### Option 2: Export with Custom Configurations

Use the [Qualcomm® AI Hub Models](https://github.com/qualcomm/ai-hub-models/blob/v0.58.0/src/qai_hub_models/models/pipertts_it) 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-IT on GitHub](https://github.com/qualcomm/ai-hub-models/blob/v0.58.0/src/qai_hub_models/models/pipertts_it) for usage instructions.

## Model Details

**Model Type:** Model_use_case.audio_generation

**Model Stats:**
- Model checkpoint: rhasspy/piper-voices
- Max decoded sequence length: 64 tokens
- Number of parameters (encoder): 7.51M
- Model size (encoder) (float): 28.7 MB
- Number of parameters (sdp): 1.04K
- Model size (sdp) (float): 6.61 KB
- Number of parameters (flow): 7.39M
- Model size (flow) (float): 28.2 MB
- Number of parameters (decoder): 1.66M
- Model size (decoder) (float): 6.37 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
|---|---|---|---|---|---|---
| charsiu_decoder | VOICE_AI | float | Snapdragon® X2 Elite | 0.323 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 | 0.312 ms | 0 - 7 MB | NPU
| charsiu_decoder | VOICE_AI | float | Snapdragon® 8 Gen 1 Mobile | 0.578 ms | 1 - 11 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® QCS8275 | 1.015 ms | 0 - 9 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 0.4 ms | 0 - 2 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® SA8775P | 0.654 ms | 0 - 10 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® SA8650P | 0.654 ms | 0 - 10 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® SA8255P | 0.654 ms | 0 - 10 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® QCS8450 | 0.578 ms | 1 - 11 MB | NPU
| charsiu_decoder | VOICE_AI | float | Snapdragon® 8 Elite Gen 5 Mobile | 0.266 ms | 0 - 10 MB | NPU
| charsiu_decoder | VOICE_AI | float | Snapdragon® 8 Elite Mobile | 0.276 ms | 0 - 9 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® SA7255P | 1.015 ms | 0 - 9 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-9075 | 0.519 ms | 1 - 3 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® SA8295P | 0.807 ms | 0 - 6 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® Dragonwing™ Q-8750 | 0.276 ms | 0 - 9 MB | NPU
| charsiu_decoder | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-X7181 | 0.426 ms | 1 - 1 MB | NPU
| charsiu_encoder | VOICE_AI | float | Snapdragon® X2 Elite | 0.63 ms | 0 - 0 MB | NPU
| charsiu_encoder | VOICE_AI | float | Snapdragon® X Elite | 1.045 ms | 0 - 0 MB | NPU
| charsiu_encoder | VOICE_AI | float | Snapdragon® 8 Gen 3 Mobile | 0.637 ms | 0 - 7 MB | NPU
| charsiu_encoder | VOICE_AI | float | Snapdragon® 8 Gen 1 Mobile | 1.35 ms | 0 - 9 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® QCS8275 | 2.802 ms | 0 - 9 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 0.895 ms | 0 - 1 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® SA8775P | 1.26 ms | 0 - 10 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® SA8650P | 1.26 ms | 0 - 10 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® SA8255P | 1.26 ms | 0 - 10 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® QCS8450 | 1.35 ms | 0 - 9 MB | NPU
| charsiu_encoder | VOICE_AI | float | Snapdragon® 8 Elite Gen 5 Mobile | 0.488 ms | 0 - 8 MB | NPU
| charsiu_encoder | VOICE_AI | float | Snapdragon® 8 Elite Mobile | 0.528 ms | 0 - 9 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® SA7255P | 2.802 ms | 0 - 9 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-9075 | 1.12 ms | 0 - 2 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® SA8295P | 1.742 ms | 0 - 6 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® Dragonwing™ Q-8750 | 0.528 ms | 0 - 9 MB | NPU
| charsiu_encoder | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-X7181 | 1.045 ms | 0 - 0 MB | NPU
| decoder | VOICE_AI | float | Snapdragon® X2 Elite | 1.754 ms | 0 - 0 MB | NPU
| decoder | VOICE_AI | float | Snapdragon® X Elite | 3.081 ms | 0 - 0 MB | NPU
| decoder | VOICE_AI | float | Snapdragon® 8 Gen 3 Mobile | 2.183 ms | 0 - 7 MB | NPU
| decoder | VOICE_AI | float | Snapdragon® 8 Gen 1 Mobile | 4.362 ms | 0 - 9 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® QCS8275 | 8.079 ms | 0 - 9 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 3.023 ms | 0 - 1 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® SA8775P | 3.476 ms | 0 - 5 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® SA8650P | 3.476 ms | 0 - 5 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® SA8255P | 3.476 ms | 0 - 5 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® QCS8450 | 4.362 ms | 0 - 9 MB | NPU
| decoder | VOICE_AI | float | Snapdragon® 8 Elite Gen 5 Mobile | 1.821 ms | 0 - 9 MB | NPU
| decoder | VOICE_AI | float | Snapdragon® 8 Elite Mobile | 1.892 ms | 0 - 8 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® SA7255P | 8.079 ms | 0 - 9 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-9075 | 3.336 ms | 0 - 2 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® SA8295P | 4.008 ms | 0 - 5 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® Dragonwing™ Q-8750 | 1.892 ms | 0 - 8 MB | NPU
| decoder | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-X7181 | 3.081 ms | 0 - 0 MB | NPU
| encoder | VOICE_AI | float | Snapdragon® X2 Elite | 18.516 ms | 0 - 0 MB | NPU
| encoder | VOICE_AI | float | Snapdragon® X Elite | 29.387 ms | 0 - 0 MB | NPU
| encoder | VOICE_AI | float | Snapdragon® 8 Gen 3 Mobile | 23.76 ms | 0 - 8 MB | NPU
| encoder | VOICE_AI | float | Snapdragon® 8 Gen 1 Mobile | 39.427 ms | 0 - 10 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® QCS8275 | 47.257 ms | 0 - 9 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 30.367 ms | 0 - 2 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® SA8775P | 32.934 ms | 0 - 10 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® SA8650P | 32.934 ms | 0 - 10 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® SA8255P | 32.934 ms | 0 - 10 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® QCS8450 | 39.427 ms | 0 - 10 MB | NPU
| encoder | VOICE_AI | float | Snapdragon® 8 Elite Gen 5 Mobile | 17.08 ms | 0 - 10 MB | NPU
| encoder | VOICE_AI | float | Snapdragon® 8 Elite Mobile | 19.045 ms | 0 - 13 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® SA7255P | 47.257 ms | 0 - 9 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-9075 | 32.982 ms | 2 - 5 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® SA8295P | 35.228 ms | 0 - 6 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® Dragonwing™ Q-8750 | 19.045 ms | 0 - 13 MB | NPU
| encoder | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-X7181 | 29.387 ms | 0 - 0 MB | NPU
| flow | VOICE_AI | float | Snapdragon® X2 Elite | 9.738 ms | 4 - 4 MB | NPU
| flow | VOICE_AI | float | Snapdragon® X Elite | 15.969 ms | 4 - 4 MB | NPU
| flow | VOICE_AI | float | Snapdragon® 8 Gen 3 Mobile | 10.996 ms | 4 - 11 MB | NPU
| flow | VOICE_AI | float | Snapdragon® 8 Gen 1 Mobile | 18.132 ms | 3 - 12 MB | NPU
| flow | VOICE_AI | float | Qualcomm® QCS8275 | 39.943 ms | 1 - 10 MB | NPU
| flow | VOICE_AI | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 15.034 ms | 4 - 5 MB | NPU
| flow | VOICE_AI | float | Qualcomm® SA8775P | 17.3 ms | 1 - 11 MB | NPU
| flow | VOICE_AI | float | Qualcomm® SA8650P | 17.3 ms | 1 - 11 MB | NPU
| flow | VOICE_AI | float | Qualcomm® SA8255P | 17.3 ms | 1 - 11 MB | NPU
| flow | VOICE_AI | float | Qualcomm® QCS8450 | 18.132 ms | 3 - 12 MB | NPU
| flow | VOICE_AI | float | Snapdragon® 8 Elite Gen 5 Mobile | 8.98 ms | 2 - 10 MB | NPU
| flow | VOICE_AI | float | Snapdragon® 8 Elite Mobile | 8.816 ms | 1 - 10 MB | NPU
| flow | VOICE_AI | float | Qualcomm® SA7255P | 39.943 ms | 1 - 10 MB | NPU
| flow | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-9075 | 17.389 ms | 6 - 12 MB | NPU
| flow | VOICE_AI | float | Qualcomm® SA8295P | 18.832 ms | 0 - 6 MB | NPU
| flow | VOICE_AI | float | Qualcomm® Dragonwing™ Q-8750 | 8.816 ms | 1 - 10 MB | NPU
| flow | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-X7181 | 15.969 ms | 4 - 4 MB | NPU
| sdp | VOICE_AI | float | Snapdragon® X2 Elite | 7.135 ms | 0 - 0 MB | NPU
| sdp | VOICE_AI | float | Snapdragon® X Elite | 11.237 ms | 0 - 0 MB | NPU
| sdp | VOICE_AI | float | Snapdragon® 8 Gen 3 Mobile | 7.676 ms | 0 - 8 MB | NPU
| sdp | VOICE_AI | float | Snapdragon® 8 Gen 1 Mobile | 11.186 ms | 0 - 9 MB | NPU
| sdp | VOICE_AI | float | Qualcomm® QCS8275 | 20.562 ms | 0 - 9 MB | NPU
| sdp | VOICE_AI | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 10.361 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 | 11.186 ms | 0 - 9 MB | NPU
| sdp | VOICE_AI | float | Snapdragon® 8 Elite Gen 5 Mobile | 6.618 ms | 0 - 8 MB | NPU
| sdp | VOICE_AI | float | Snapdragon® 8 Elite Mobile | 6.951 ms | 0 - 13 MB | NPU
| sdp | VOICE_AI | float | Qualcomm® SA7255P | 20.562 ms | 0 - 9 MB | NPU
| sdp | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-9075 | 11.238 ms | 0 - 2 MB | NPU
| sdp | VOICE_AI | float | Qualcomm® SA8295P | 12.674 ms | 0 - 6 MB | NPU
| sdp | VOICE_AI | float | Qualcomm® Dragonwing™ Q-8750 | 6.951 ms | 0 - 13 MB | NPU
| sdp | VOICE_AI | float | Qualcomm® Dragonwing™ IQ-X7181 | 11.237 ms | 0 - 0 MB | NPU

## License
* The license for the original implementation of PiperTTS-IT can be found
  [here](https://github.com/rhasspy/piper/blob/master/LICENSE.md).

## References
* [PiperTTS High-quality Multi-lingual Multi-accent Text-to-Speech](https://github.com/rhasspy/piper)
* [Source Model Implementation](https://github.com/rhasspy/piper)

## Community
* Join [our AI Hub Slack community](https://aihub.qualcomm.com/community/slack) to collaborate, post questions and learn more about on-device AI.
* For questions or feedback please [reach out to us](mailto:ai-hub-support@qti.qualcomm.com).