Fine-tuning NVIDIA Nemotron Speech ASR on Amazon EC2 for domain adaptation

Amazon AWS AI Blog / 3/13/2026

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Key Points

The post demonstrates fine-tuning the NVIDIA Nemotron Speech ASR model (Parakeet TDT 0.6B V2) for domain adaptation on Amazon EC2.
It shows using synthetic speech data to boost transcription accuracy for specialized applications.
It presents an end-to-end workflow that combines AWS infrastructure with popular open-source frameworks to implement the tuning pipeline.
The guide offers practical steps and considerations for reproducing domain-specific ASR improvements in a cloud-based setup.

In this post, we explore how to fine-tune a leaderboard-topping, NVIDIA Nemotron Speech Automatic Speech Recognition (ASR) model; Parakeet TDT 0.6B V2. Using synthetic speech data to achieve superior transcription results for specialised applications, we'll walk through an end-to-end workflow that combines AWS infrastructure with the following popular open-source frameworks.