With Filestar you get 80 different skills for working productively with NIST SPHERE Audio File (.sph) files.
About .Sph
Name
NIST SPHERE Audio File
Extension
.sph
Format
Binary
Category
Audio
Developer
NIST
Description
Waveform audio file created in the NIST SPHERE format, which is often used in speech recognition research; often contains a recording of a person speaking; can be provided as input to speech recognition systems.