OGG to SPH Converter
Produce SPHERE speech research audio from OGG
Speech Corpus Standard
SPH is the format behind major speech datasets — convert OGG recordings into properly formatted research audio.
Dataset Preparation
Process entire OGG speech collections to SPH simultaneously — prepare research corpora in one operation.
Online Conversion
No speech toolkit installation required — produce SPH files from OGG directly through your browser.
How to convert OGG 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-defined format for speech research datasets. ASR training pipelines and linguistic tools expect SPHERE-formatted input.
Kaldi, HTK, NIST evaluation tools, and academic speech corpora like TIMIT and Switchboard use SPHERE as their audio format.
SPH and NIST both refer to the SPHERE format — SPeech HEader Resources defined by the National Institute of Standards and Technology.
Speech corpora typically use 8 or 16 kHz. The converter handles resampling from the OGG source automatically.
Upload a batch of OGG speech recordings and produce SPH output for every file at once — ready for ASR research.