NRT files exist as 2 different types. Please find information about each of them below.
Type 1: Nokia Ringtone
NRT is an audio file format used for Nokia mobile phone ringtones. NRT files are similar to MIDI files, but smaller to fit phones. Old Nokia PC Suite versions converted NRT files to more popular forma...
NRT is an audio file format used for Nokia mobile phone ringtones. NRT files are similar to MIDI files, but smaller to fit phones. Old Nokia PC Suite versions converted NRT files to more popular formats like MIDI and MP3. Newer Nokia PC Suite versions cannot convert NRT files, making conversion difficult. Nokia Sound Converter, included in Nokia PC Suite, converted MIDI files to NRT ringtones for transfer to Nokia phones. Without access to Nokia Sound Converter, NRT files likely cannot be opened. File Viewer Plus opens over 400 formats, including NRT files. NRT files save melodies as MIDI data for use as Nokia phone ringtones. The Nokia Suite programs also handle NRT files when Nokia Sound Converter does not. The main issue is NRT files incorrectly associated with other programs. Double-click an NRT file to open it with the appropriate application. If no application supports NRT files, install Nokia Sound Converter which works with them. We provide links to safely download software supporting NRT files.
Nokia Suite
Audio Conversion Tools