WAV to SPH Converter
Produce SPHERE speech research audio from WAV files
Ideal Source Format
Uncompressed WAV is the best source for SPHERE speech corpora — artifact-free research data.
Corpus Standard
SPH is what major speech toolkits expect — produce from uncompressed WAV.
Dataset Processing
Convert full WAV collections to SPH simultaneously.
How to convert WAV 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
SPH (SPHERE) is the NIST standard for speech corpora. Uncompressed WAV is the gold standard source for research data.
Kaldi, HTK, NIST evaluation tools, and academic speech datasets use SPHERE format.
Yes — both refer to SPHERE defined by the National Institute of Standards and Technology.
SPH supports PCM — WAV to SPH preserves audio data without loss.
Upload your entire WAV speech collection and produce SPH for every file at once.