Drop file here. 150 MB maximum file size.
An SPH file is an audio file created in the NIST SPHERE format, which is often used in searching speech recognition. Usually contains the apos; recording of apos; a person who speaks. The SPH files can be provided as voice-recognition system entries.
A WMA is a proprietary ASF (Advanced Systems Format) audio file developed by Microsoft. It contains Windows Media Audio and metadata objects such as title, l&apos, artist, album and genre of track. The WMA files are similar to .MP3 files and used mainly for streaming web music.
Access powerful and secure free online SPH tools to convert, view, edit, merge, split, and compare SPH files β all without installing any software. Our tools support the .SPH (NIST SPHERE Audio File) file extension and run smoothly in any modern browser.
Select a tool below to explore features and manage your SPH files directly from your device with ease.
Chose or drag & drop your SPH file, click Convert to WMA, and download the WMA file. No registration needed.
Yes, all uploads are encrypted. Your files are auto-deleted after 24 hours.
Yes, our converter retains layout, fonts, and images as accurately as possible.
Fileproinfo converter engine works fast. You can convert SPH to WMA in a few seconds to couple of minutes for large size files with complex structure.
FileProInfo support manay file formats that allow you to convert SPH to 100s of file formats, without any limit, registration and downloading, 100% free and online SPH converter.
All converters in this list are manually verified & 100% free and working properly, however you must use these apps according to their respective terms & conditions.
This tool and page updated at: 12-Apr-2025
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