Tech info
In addition to the features mentioned on the main page, the program intelligently employs many 'behind the scenes' processes. Many of these processes save valuable time during composition, by allowing you to concentrate on the musical content rather than strict compliance to the RTTTL 1.0 specification.

Efficient conversion to maximise use of SMS data.
TrueTone performs analysis of the RTTTL data during processing so as to generate the most efficient file size - Thus potentially saving ringtone delivery costs by keeping SMS data to a minimum - and/or - Increasing maximum note allowance.

Note Limit/Count
TrueTone provides a note count read out and note limit option. This serves as a useful guideline as well as potential SMS data capping.

Auto octave, semitone and fit to range transposition options
"TrueTone" offers various functions to attempt to fit all notes of a MIDI file within the Nokia RTTTL specified note range - which spans approximately three octaves. "TrueTone" can transpose the MIDI phrase up or down one octave at a time. If this does not result in the required range and "enable semitone transposition" is selected, "TrueTone" will attempt to transpose the phrase one semi-tone at a time - indicated on screen after ringtone conversion if successful. [Note that this will result in a change of key.] Alternatively, the fail safe 'fit to range' option shifts individual notes extending beyond the range, one octave at a time, until they fit.

Accurate chaining of 'pauses'
Pauses do not need to fall strictly within the available note durations (see below) - "TrueTone" will intelligently chain together pause values to achieve the desired length. This is not an applicable technique for extending note lengths as there is an audible 'glitch' between chained notes.

Post conversion comments and error warnings
TrueTone provides helpful post conversion comments to inform the user if any of the 'background processes' and features have been implemented. It also supplies explanations of any conversion errors that may occur due to incorrectly formatted MIDI files.

Filtering of unnecessary MIDI information
These processes are designed to save time during MIDI composition, True Tone will automatically correct and bring into line MIDI parameters that do not fit the RTTTL specification. This also allows TrueTone to provide an accurate post conversion MIDI for website previews.

Velocity, pan, channel, control changes etc
Tempo correction
Offset removal
Deletion of doubled notes
Reduction of polyphony
Truncation of note lengths

Soundfont (SF2) Sample Bank
Along with "TrueTone" we have supplied two sample banks (SF2 format Soundfonts) especially designed for creating audio previews and aiding MIDI composition. Every available note on a Nokia phone was carefully sampled and mapped to an 8Mb sample bank, the more streamlined 4Mb version is available for those with hardware limitations. It also has the GM Standard metronome samples embedded. The Soundfonts can be used with any Soundfont compatible soundcard (eg. Creative Labs Sound Blaster series) as well as some Soundfont compatible software synthesizers.

Once the midi sequence has been composed (using the soundfont for reference), it should then be converted using TrueTone with the 'Generate midi preview' option checked. (These preview MIDI's will be an accurate representation of how the RTTTL will sound on the end-users phone.) The soundfont in conjunction with third party software can then be used to convert these midi previews into audio. These in turn can be compressed into MP3's / RealAudio, ready to be published on the internet. Using this method provides an efficient, clear and precise audio preview.

back to top