---
license: cc-by-4.0
language: tr
library_name: onnx
tags:
- onnx
- wav2vec2
- ctc
- forced-alignment
- quantized
- parseh
base_model: mpoyraz/wav2vec2-xls-r-300m-cv7-turkish
base_model_relation: quantized
datasets:
- common_voice_7_0
- mediaspeech
---

# Parseh Turkish forced-alignment network

This CTC network aligns known Turkish caption text to 16 kHz mono audio in Parseh. It is not a general-purpose speech-recognition model. Parseh runs it locally with NumPy and ONNX Runtime, then uses CTC Viterbi alignment for word spans or character spans.

## Provenance and conversion

Derived from [mpoyraz/wav2vec2-xls-r-300m-cv7-turkish](https://huggingface.co/mpoyraz/wav2vec2-xls-r-300m-cv7-turkish) at `708639f50559d7970f462e13ec64d3f059ca89f6`, based on `facebook/wav2vec2-large-xls-r-300m`. It was converted to ONNX opset 17 and dynamically quantized to int8 (`QUInt8`, per-channel `MatMul` weights); no retraining was performed. Exact source and output hashes are in `meta.json` and `SHA256SUMS`.

## Verification

- ONNX Runtime CPU versions: 1.23.2, 1.30.0; dynamic 0.5 s and 60 s inputs passed.
- fp32 ONNX/PyTorch log-softmax max absolute difference: `9.5367431640625e-06`; frame-argmax agreement: `None`.
- int8/fp32 frame-argmax agreement: `1.0`; generated-speech span-start delta median/p95/max: `0.0` / `0.0` / `0.0` ms.
- Generated 30-second CPU alignment cost: `6.663475` s; peak RSS: `2870992896` bytes.

`espeak-ng` generated audio was used only for pipeline monotonicity, not a real-speech accuracy claim. Unknown characters use a wildcard score to preserve a monotonic path.

## Limitations

Input must be 16 kHz mono audio and known caption text. Noise, accents, text errors, vocabulary gaps, and quantization can affect timestamps. No accuracy guarantee is made. 

## Licence and attribution

The source tag is `cc-by-4.0`. `LICENSE` and `NOTICE` retain source, base-model, dataset attribution, and changes. No endorsement by original authors, Meta, Mozilla, or Parseh is implied.

## Citation from the source card

No separate citation block was provided by the source card.

## Contact

Contact: [development@parseh.io](mailto:development@parseh.io).