Technical Specification
To be recognized by ringtone programs, an RTTTL/Nokring format ringtone must contain three specific elements: name, settings, and notes.
For example, here is the RTTTL ringtone for Haunted House:
HauntedHouse: d=4,o=5,b=108: 2a4, 2e, 2d#, 2b4, 2a4, 2c, 2d, 2a#4, 2e., e, 1f4, 1a4, 1d#, 2e., d, 2c., b4, 1a4, 1p, 2a4, 2e, 2d#, 2b4, 2a4, 2c, 2d, 2a#4, 2e., e, 1f4, 1a4, 1d#, 2e., d, 2c., b4, 1a4
The three parts are separated by a colon.
- Part 1: name of the ringtone (here: "HauntedHouse"), a string of characters represents the name of the ringtone
- Part 2: settings (here: d=4,o=5,b=108), where "d=" is the default duration of a note. In this case, the "4" means that each note with no duration specifier (see below) is by default considered a quarter note. "8" would mean an eighth note, and so on. Accordingly, "o=" is the default octave. There are four octaves in the Nokring/RTTTL format. And "b=" is the tempo, in "beats per minute".
- Part 3: the notes. Each note is separated by a comma and includes, in sequence: a duration specifier, a standard music note, either a, b, c, d, e, f or g, and an octave specifier. If no duration or octave specifier are present, the default applies.
Read more about this topic: Ring Tone Transfer Language
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