Ringtones are digital sounds that are used to alert the user when a call comes in or a text message is sent. They can be downloaded from many web sites and can be created by using recordings, sound combinations, messages, or even snippets of music. Typically, ringtones last no more than 30 seconds. Most modern cellphones have the ability to be configured to play back specific samples of music. dzwonki na telefon can be recorded with a variety of methods, including MIDI (the communications protocol for electronic musical instruments). Some of these ringtones are made using polyphonic technology, which allows several notes to be played at the same time. Polyphonic ringtones can also be created using soundbanks. These soundbanks use synthesized instruments to create a more varied sound. Many people use ringtones as a way to identify them when they are on a call. Others choose a different tone for important contacts or family members. For example, a mother may choose a calming melody for her baby's ring tone. Another person might choose a military or cute baby ringtone to keep their phone from waking the baby when they are asleep.