M4R to SPX Converter
Convert your m4r files to spx online & free
How to convert m4r to spx
Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.
Choose "to spx"
Choose spx or any other format you need as a result (more than 200 formats supported)
Download your spx
Let the file convert and you can download your spx file right afterwards
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.
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.