TTA to NIST Converter
Encode True Audio as NIST evaluation format online
Evaluation Data
NIST is the standard for speech benchmarks — lossless TTA gives high-quality audio for evaluation datasets.
Clean Recordings
Lossless TTA ensures speech data enters NIST format without compression artifacts from prior encoding.
Online Encoding
No NIST toolkit needed — our servers convert TTA to NIST format entirely through your browser.
How to convert TTA to NIST
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose nist or any other format you need as a result (more than 200 formats supported)
Let the file convert and you can download your nist file right afterwards
About formats
Frequently Asked Questions
NIST is the audio specification from the National Institute of Standards and Technology for speech evaluation benchmarks.
Speech recognition benchmarks require NIST-formatted audio. Lossless TTA provides clean recordings for evaluation.
Kaldi, HTK, NIST tools, and speech recognition frameworks process NIST audio for model training.
They share the same NIST Sphere header specification — some tools treat them interchangeably.
TTA uploads are deleted immediately. NIST outputs are removed within 24 hours.