NVIDIA NeMo Speech Developer Docs

NeMo-Speech

NVIDIA NeMo Speech

is an open-source toolkit for speech, audio, and multimodal language model research, with a clear path from experimentation to production deployment.

🎙️ Transcribe Speech (ASR) Convert audio to text with state-of-the-art accuracy. Supports 14+ languages, streaming, and timestamps. Quick Start →

🔊 Synthesize Speech (TTS) Generate natural human speech from text. Multi-language, multi-speaker, with controllable prosody. Quick Start →

👥 Identify Speakers Determine "who spoke when" in multi-speaker audio. Speaker diarization, recognition, and verification. Quick Start →

🧠 Speech Language Models Audio-aware LLMs that understand and generate speech. Use HuggingFace Transformers, or NeMo Automodel for efficient MoE and model parallelism. Speech-to-text, speech-to-speech, and more. Quick Start →

🎧 Process Audio Enhance, restore, and separate audio signals. Improve audio quality for downstream tasks. Quick Start →

🛠️ Speech AI Tools Forced alignment, data exploration, CTC segmentation, and evaluation utilities for speech workflows. Explore Tools →

What is NeMo Speech?

NVIDIA NeMo Speech

is an open-source toolkit for building, customizing, and deploying speech, audio, and multimodal language models. It provides:

Pretrained models — production-ready checkpoints on

and

HuggingFace Hub

Modular architecture — neural modules you can mix, match, and extend

Scalable training — multi-GPU/multi-node via PyTorch Lightning with mixed-precision support

Simple configuration — YAML-based experiment configs with

Get started (install the PyTorch build for your platform first):

uvpipinstall'nemo-toolkit[asr,tts]'importnemo.collections.asrasnemo_asrmodel=nemo_asr.models.ASRModel.from_pretrained("nvidia/parakeet-tdt-0.6b-v2")print(model.transcribe(["audio.wav"])[0].text)Trying to finetune a model?

Check out our latest /nemo-speech-finetune-asr

.

Collections

Automatic Speech Recognition (ASR)

Text-to-Speech (TTS)

Resources and Documentation

Speaker Diarization

Speaker Recognition (SR)

Speech and Audio Processing

Resources and Documentation

Speech Self-Supervised Learning

Speech Classification

Speech AI Tools

NeMo Forced Aligner (NFA)

Dataset Creation Tool Based on CTC-Segmentation

Speech Data Explorer

Comparison tool for ASR Models

Speech Data Processor

APIs

Experiment Manager

NeMo Common Collection API

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