NOTICE.md

NOTICE — Third-Party Model Attribution

This repository contains mirrors of open-source AI models and support files used by the ChatBack Android app. All models run 100% on-device.

---

Gemma 3 1B-IT

• Author: Google
• License: Gemma Terms of Use (see LICENSE-gemma)
• Format: LiteRT .task (INT4 quantised)
• Original: https://huggingface.co/0x3/gemma3-1b-it-int4.task
• Converted by: 0x3 (community)
• Used for: All chatroom AI features + AI Chat fallback

Gemma 4 E2B-IT

• Author: Google
• License: Gemma Terms of Use (see LICENSE-gemma)
• Format: LiteRT .litertlm
• Original: https://huggingface.co/google/gemma-4-e2b-it
• Used for: Optional AI Chat upgrade (best quality)

Gemma 4 E2B-IT Abliterated

• Author: Google (model); abliteration by community
• License: Gemma Terms of Use (see LICENSE-gemma)
• Format: LiteRT .litertlm
• Used for: Optional AI Chat upgrade — NSFW/uncensored variant
• Note: Safety alignment removed. Only accessible when NSFW mode is enabled.

Piper TTS voices (Amy, Lessac, LibriTTS-R, Ryan, Joe)

• Author: rhasspy / Piper contributors
• License: MIT (see LICENSE-piper)
• Original: https://huggingface.co/rhasspy/piper-voices
• American English medium-quality VITS ONNX models

Kokoro TTS English v1.0 (q8f16 ONNX)

• Author: Kokoro TTS project (hexgrad); ONNX export by onnx-community
• License: Apache 2.0 (see LICENSE-kokoro)
• Original model: https://huggingface.co/onnx-community/Kokoro-82M-v1.0-ONNX
• 28 English voices (American & British, female & male)
• Mixed int8-weight / float16-activation quantization for better quality than pure int8
• voices.bin + tokens.txt from csukuangfj/sherpa-onnx-kokoro-multi-lang-v1_0 (compatible format)
• espeak-ng data NOT included — app uses its own Java IPA phonemizer

Sherpa-ONNX

• Author: k2-fsa / Next-gen Kaldi
• License: Apache 2.0 (see LICENSE-sherpa-onnx)
• Original: https://github.com/k2-fsa/sherpa-onnx
• Provides voices.bin and tokens.txt format used by the app