Apple said its music-creating app, GarageBand, is now available for iPhone and iPod touch users.

GarageBand is a streamlined digital audio workstation (DAW) and music sequencer, which can record and play back multiple tracks of audio. Built-in audio filters allow the user to enhance the audio track for recording guitar instruments. The tuning system can also effectively imitate the auto-tune effect when tuned to the maximum.

GarageBand on iPad has been a big hit and we think customers will love using it on their iPhone or iPod touch, said Philip Schiller, Apple's senior vice president of Worldwide Product Marketing. The innovative Multi-Touch interface combined with Smart Instruments makes it easy to create great sounding music, even if you've never studied music or played an instrument before.

GarageBand features a collection of fun Touch Instruments that sound great and make it easy for beginners or experienced musicians to play and record keyboards, guitars, drums and basses in a wide variety of styles. Smart Instruments now allow a person to choose from an extensive new library of custom chords so that he or she can play and strum along with his or her favorite songs.

Users can plug their electric guitar into iPad, iPhone or iPod touch to play and record through classic amps and stompbox effects, or record their voice or any acoustic sound using the built-in microphone. GarageBand allows them to record and mix up to eight tracks and then share the finished song with friends or send it to Mac to keep working on it in GarageBand or Logic Pro.

GarageBand 1.1 for iPad, iPhone and iPod touch is available on the App Store for $4.99 to new users, or as a free update for existing GarageBand for iPad customers.

GarageBand, which was first introduced earlier this year on iPad, uses Apple's revolutionary Multi-Touch interface to make it easy for anyone to create and record their own songs, even if they've never played an instrument before.