From Wikipedia, the free encyclopedia - View original article
The RTTTL format is a string divided into three sections: name, default value, and data.
The name section consists of a string describing the name of the ringtone. It can be no longer than 10 characters, and cannot contain a colon ":" character. (However, since the Smart Messaging specification allows names up to 15 characters in length, some applications processing RTTTL also do so.)
The default value section is a set of values separated by commas, where each value contains a key and a value separated by an = character, which describes certain defaults which should be adhered to during the execution of the ringtone. Possible names are
The data section consists of a set of character strings separated by commas, where each string contains a duration, pitch, octave and optional dotting (which increases the duration of the note by one half).
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:
HauntHouse: 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.
Standard musical durations are denoted by the following notations:
The RTTTL format allows octaves starting from the A below middle C and going up four octaves. This corresponds with the inability of cellphones to reproduce certain tones audibly. These octaves are numbered from lowest pitch to highest pitch from 4 to 7.
The octave should be left out of the notation in the case of a rest or pause in the pattern.
An example of the RTTTL format would be