The iPad's big, friendly screen and instantaneous swipe control, not to mention its portability, make it an excellent tool for musicians, whether that's for laying down and mixing tracks, tuning a guitar or simply horsing around on a set of virtual bongos. With Blur frontman Damon Albarn recording the most recent Gorillaz album entirely on an iPad, it's clear that this isn't just for amateurs - Apple's tablet and it's associated apps have opened up a whole new world for musicians.The selection of music-based apps available is huge so we've trawled iTunes for the pick of the bunch. Without further ado, here are the best iPad apps for musicians.GarageBandOriginally a Mac OS application, GarageBand was ported over to iOS for the launch of the iPad 2 and is\u00a0probably the most well-known iPad music apps, as well as being a great all-rounder. Using a whole bandful\u00a0of virtual instruments - including piano, guitar and drums - GarageBand can be used as a virtual studio for\u00a0laying down multiple tracks. You can even plug an electric guitar in to record some genuine riffs, while the\u00a0on-board microphone can be used to capture your warblings.The beauty of this app is that it's so easy to use, making it ideal for beginners. Priced at just \u00a32.99, this\u00a0one is an absolute steal.\u00a0HANDS-ONPianist ProYou might recognise this popular piano app from the Apple TV ads - it's the one that enables you to tickle\u00a0the ivories without even having to lift a piano lid, thanks to its mind-bogglingly reaslistic sound. The app also\u00a0includes a drum machine and an arpeggiator - a feature that automatically steps through an arpeggio of\u00a0notes (meaning the notes of a chord, played separately).\u00a0Pianist Pro supports MIDI control of external synths and you can even choose from a selection of scales\u00a0(such as pentatonic or natural minor) or create your own, then swipe the screen to play back the notes in\u00a0any key. All very clever stuff and a bargain, at just \u00a32.99.Piano Accordio ProTaking the piano idea one step further, this fun yet functional app recreates the experience of playing an\u00a0accordion, without the need to invest in your own squeezebox - all you need to shell out is \u00a32.49. Like the\u00a0real thing, there's a keyboard on one side and a button arrangement on the other and if you've got a\u00a0sturdy iPad dock, then you can even play the app with the iPad standing up and facing away from you, for\u00a0an even more realistic accordion experience.The app enables you to scroll along the keyboard to change the key and you can also play along to\u00a0music in your library. Pick your tune wisely, is our advice. There are some songs that really don't need to\u00a0be heard on an accordion.MiniSynth ProPorted over from the iPhone, MiniSynth Pro is a professional-grade virtual analogue synthesizer and is great\u00a0for both beginners and seasoned musicians. The app includes all sorts of technical-sounding things such as\u00a0"dual syncable oscillators" and "zero latency sound processing" but the intuitive interface helps to keep\u00a0things\u00a0manageable.The app also includes USB MIDI support for external controllers. The price tag is currently reduced by 50%,\u00a0making it just \u00a32.99, so get in quick.Korg iELECTRIBEThis clever app is based on the famous Korg ELECTRIBE-R drum machine, which first appeared in 1999.\u00a0Converted for use on the iPad, the tablet version is known as the Korg iELECTRIBE and will set you back\u00a0\u00a313.99. The retro-tinged graphics mean that the app looks like the real thing to make it as intuitive as\u00a0possible. The 16-step sequencer can be used to build your very own tune using up to eight different layers.The best part is that you can share your finished work on SoundCloud (provided that you're a registered\u00a0user).Drum Meister GrandThis one is fairly self-explanatory - it lets you play the drums from your Apple tablet without the need to\u00a0find the space to house a drumkit or to soundproof your home. Priced at just \u00a31.49, Drum Meister Grand\u00a0offers four different drum kit sounds - rock, jazz, dance and electronic - with a straightforward visual\u00a0interface that puts you in the drummer's seat. There are 10 basic drum components and you can play 12\u00a0different sounds simultaneously.\u00a0You can add, remove or even resize components to find the most comfortable setup for your fingers and\u00a0there's also an optional metronome to keep you in time. There are 40 pre-recorded beats or you can\u00a0record and save your own concoctions.MorphWizThis wacky app was partly inspired by the Haken Continuum Fingerboard, an equally bizarre MIDI\u00a0instrument used on stage by Jordan Rudess - best known as the keyboardist from prog rockers Dream\u00a0Theater. Like the real thing, the app is essentially a vertical grid-based instrument that assigns audio\u00a0waveforms as visual shapes on the grid. These can then be morphed by tapping the screen, while you can\u00a0also control the initial pitch of any note (you can control up to 10 notes simultaneously). You can also\u00a0control lots of other elements such as vibrato and tremolo and choose from different scales and chords to\u00a0assign to the playing surface.All this can be yours for \u00a36.99 and the good news is that even if you have absolutely no idea what you're\u00a0doing, MorphWiz is still great fun to play with.TNR-iThe iPad version of Yamaha's baffling Tenori-on instrument - famously used by electro popstrel Little Boots -\u00a0looks very similar to the real thing. The 16 x 16 grid of buttons can be used to create tunes with\u00a0the horizontal lines controlling time and the vertical lines dedicated to pitch. You can record up to 16 layers\u00a0which combine to form rhythms and melodies. What's more, each sound makes the corresponding button\u00a0glow, so you'll end up with a virtual light show that plays in time with your tune. On top of that, there are\u00a0various modes that can be fired up to alter the results.As well as being a tool for serious electro-tinged music, this one is also good fun to tinker with, even for\u00a0non-musos and at \u00a313.99, it's a hell of a lot cheaper than the real thing, which will set you back several\u00a0hundred quid.ReactableAnother app inspired by a weird musical instrument, this one is based on the Reactable - a round tabletop-based touchscreen invention, famously used by Bjork on her Volta tour. Like the real thing, the iPad app\u00a0version combines sampling with modular synthesis, digital audio effects and combines them via multi-touch\u00a0control. The app offers lots of flexibility from uploading your own loops and choosing from a large range of\u00a0instruments to creating distortion, compresson and reverb.\u00a0You can also control basics like tempo and tone or delve further into the world of LFO (low frequency\u00a0oscillators) with differing waveforms. Yours for \u00a36.99.Looptastic HDIf looping is your thing, then look no further. Looptastic HD (\u00a310.49) enables you to create your own\u00a0remixes using a catalogue of over 900 existing loops from styles including hip hop, dubstep and trance. The\u00a0loops can be downloaded over the web from the Loop Store or you can record your own using the built-in\u00a0microphone or import AIFF, WAV, or OGG files over a web connection.You can also record your performance and export to Mac or PC as 16-bit stereo AIFF files or share your\u00a0remix on SoundCloud. All loops are automatically time-stretched to fit the master tempo, so it really\u00a0couldn't be any easier.Studio TrackStudio Track is essentialy an eight-track recorder, in iPad form, meaning that budding songwriters can lay\u00a0down tracks while on the fly. It's got all the usual bells and whistles that you'd expect, such as a\u00a0metronome for keeping time and the ability to monitor and record playback levels.\u00a0Audio can be imported into the app via email attachment or by dragging them into StudioTrack's file sharing\u00a0area under Apps in iTunes - WAV, MP3 and AIFF file formats are supported. You'll also be able to add effects\u00a0such as reverb and delay to your vocals and instruments, making recording demos an absolute piece of\u00a0cake. Not bad for \u00a313.99iShred LiveDesigned for use with the Griffin GuitarConnect cable and the Griffin StompBox, this app enables you turn\u00a0your Apple tablet into a portable guitar rig. The basic offering includes a pedal board sporting a Q-36\u00a0space modulator, HK-2000 digital delay (with tap tempo) and buzz kill. You can also switch between clean\u00a0and overdrive channels and there are six preset effects along with the option to create up to 48 of your\u00a0own, which are split into eight colour-coded banks.The app is free to download, and you can beef up the\u00a0basic offering through a selection of in-app purchases including a super fuzz pedal, variable waveform\u00a0tremolo and a compressor pedal.This is a great app for indulging in a little bit of guitar time without having to setup your full-size rig and it's\u00a0worth downloading for the guitar tuner alone. There's also a four-track loop recorder on board.REVIEW - GuitarConnectHANDS-ON - Griffin StompBoxStompBoxNot to be confused with Griffin's StompBox iPad accessory, this app enables you to turn your Apple tablet\u00a0into a digital effects unit for your guitar. Along with a guitar tuner, metronome and loop recording tools,\u00a0StompBox also includes a rack of 17 stereo effects, along with seven types of distortion effect (including overdrive and fuzz). Once you've built up your own library of patches, you can switch between\u00a0them using the virtual pedal.The built-in media player enables you to load up your favourite MP3s to play along to and you can even\u00a0slow them down, without changing the pitch. You'll need to attach your axe with an iRig, which will set you\u00a0back about \u00a326, while the app itself has a price tag of \u00a313.99.Guitarist's ReferenceAn invaluable point of reference for any guitarist - beginner or pro - this useful app is a one-stop shop for all\u00a0your axe-related musical theory questions. There's a guitar chord encyclopedia\u00a0containing over 3000 of the\u00a0most commonly used chords, including easy to read diagrams, as well as a guitar scale reference with 42\u00a0scale types - major, minor,\u00a0pentatonic, or diminished - they're all here. You'll also find a guide to arpeggios\u00a0along with a list of the most popular alternate guitar tunings.On top of all that, there's a reverse chord finder tool for finding out the names of the chords that you've\u00a0come up with and there's also support for both left- and right-handed players. An absolute bargain at just\u00a0\u00a33.99.What's your favourite music app for the iPad? Let us know in the comments box below.