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.
An M4A is an audio file stored in MPEG-4 encoded with either Advanced Audio Coding (AAC) or Apple Lossless Audio Codec (ALAC) formats. It stores different types of audio content, such as songs, podcasts and audio books.
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 M4A, and download the M4A 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 M4A 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
About FileProInfo: FileProInfo is a trusted platform dedicated to file formats and software programs. We provide accurate technical details, easy-to-use navigation, and advanced search capabilities to help users explore, manage, and convert file types efficiently.
Listed file converters are from the wide range of online file converter.
These are the most polular file/document converters based on the user's review and usage on the FileProInfo.