Convertm4rspx
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M4R to SPX

Online Convert M4R to SPX Use OnlineConvert online. Free fast! No registration is required.

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How to convert M4R to SPX?

Online M4R to SPX, you can put the M4R to SPX format on your computer, tablet or mobile phone without downloading any software!

Step 1

Upload M4R file

Select files from your computer, Google Drive, Dropbox, URL or by dragging them on the page.
Step 2

Select 'SPX'

Select output SPX or any other format as the conversion result (click the Convert button)
Step 3

Download your M4R file

After the conversion you can download your SPX file and upload it to Google Drive, Dropbox.

m4r : MPEG 4 Ringtones Audio

M4R - is a digital multimedia container format used to store audio in mono channel mode. This format is suitable for store ringtones and it is widely used by Apple iPhone for its ringtones. Needless to say that M4R and M4A formats shares many similar features.

spx : Speex

An SPX file is a Speex audio file saved within an Ogg Vorbis container. Speex is an open source patent-free audio format designed for speech compression. It supports variable bitrate (VBR) encoding and several features not found in other audio codecs. Some examples include embedded encoding, intensity stereo encoding, and voice activity detection.
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