How to convert MP3 files to SPH online?

Step 1.

Click "Choose File" button to select a mp3 file on your computer. MP3 file size can be up to 50 Mb.

Step 2.

Click "Convert" button to start conversion.

Step 3.

When the conversion process is complete, you can download the SPH file.

Information about MP3 and SPH file formats

Name	MP3	SPH
Full name	MP3 - MPEG-1 or MPEG-2 Audio Layer III	NIST SPHERE Audio File
File extension	.mp3	.sph
MIME type	audio/mpeg, audio/MPA, audio/mpa-robust
Developed by	Fraunhofer Institute	Institute of Standards and Technology (NIST)
Type of format	Digital audio
Description	MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.	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.
Technical details	The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source.
File conversion	MP3 conversion	SPH conversion
Associated programs	VLC media player, MPlayer, Winamp, foobar2000.	SoX
Wiki	https://en.wikipedia.org/wiki/MP3	https://www.nist.gov/

MP3 to SPH conversion quality rating:

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