SPH to W64 Converter
Convert your sph files to w64 online & free
SPeech HEader Resources
Sonic Foundry’s 64-bit RIFF/WAV format
How to convert SPH to W64
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose "to w64"
Choose w64 or any other format you need as a result (more than 200 formats supported)
Download your w64
Let the file convert and you can download your w64 file right afterwards