Using dedicated audio editing programs like the Awave Studio or even some ringtone maker it should be possible to process common audio files (like the .m4a) and export it to some ringtone formats including RTTTL Nokring ringtones (.rtttl).
Convert MPEG-4 compressed audio to RTTTL / Nokring mobile ring-tone format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert m4a to rtttl on Windows
A universal audio tool that supports editing and converting of many audio file formats from different platforms. In the latest versions of Awave Studio developers announced about 260 audio formats can be read in it.
Convert from m4a file
|Yes, Awave Studio supports m4a file conversion as a source file type.||Yes||Yes||m4a editor||Yes||No||No||No|
to rtttl file
|Yes, Awave Studio supports rtttl file conversion as a target file type.||No||No||No||No||No||No||No|
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.