The phrase 'polyphonic ringtone
' is used more and more in todays mobile phone
jargon. Basically it's a fancy way of saying that the phone can play multiple sounds at once - producing a more pleasing sound. First generation phones contained a 'buzzer
' which was only designed to produce two types of beep
s (using different current
s would produce different tones of beeps). The polyphonic design is really a cheap option for mobile phone manufacturers because it produces good sound quality without implementing more expensive circuitry to reproduce digital sound (DSP
) like the sound card
in your computer.
Polyphonic ringtones are generally MIDI
files converted to 'scalable polyphonic MIDI' files (they're optimised for the standard 4 channels supported by the phone). They can be uploaded to your phone via a data cable
(IR) port or purchased on the web which sends it straight to your phone. See http://www.boltblue.com for an example of ringtones, pictures, etc.