MXF to SPH Converter
Extract NIST SPH speech data from MXF recordings
Research Standard
SPH is the NIST standard for speech research. Extract MXF audio for linguistic analysis and recognition studies.
Rich Metadata
SPHERE format carries detailed recording metadata — valuable context for speech research from MXF sources.
Cloud Extraction
SPH extraction from MXF runs on our servers — no NIST tools required on your research workstation.
How to convert MXF to SPH
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose sph or any other format you need as a result (more than 200 formats supported)
Let the file convert and you can download your sph file right afterwards
About formats
Frequently Asked Questions
SPHERE (SPH) is the standard audio format for NIST speech research — essential for linguistic corpora and recognition studies.
NIST speech evaluation campaigns, Linguistic Data Consortium corpora, and speech recognition research use SPH format.
SPH is specific to speech research. SOX, NIST tools, and Kaldi speech recognition toolkit handle SPH files.
SPHERE headers contain rich metadata about recording conditions, speaker information, and channel details.
Upload several MXF files and extract SPH audio from each simultaneously for speech corpus building.