Here's the lowdown in IK's own words...
Both can be played using the built-in keyboard and patterns, but they truly excel when used with an external keyboard controller and a MIDI interface – like the newly-released iRig™ MIDI – to replace older hardware sound and synthesizer modules for live performance. Together with iRig MIDI, SampleTank offers the most portable and best quality sound and groove module solution for mobile musicians to date.
SampleTank sounds are known for their high quality and extreme variety that is unmatched on the iOS platform. For the first time in a mobile device, users are able to experience the same quality of sounds they are used to from the most sophisticated software or hardware instruments like IK's range of virtual instruments for the Mac and PC.
SampleTank Free users can immediately start using 8 instruments (4 + 4 by registering) on their favorite iOS device including Drums, Bass, Electric Piano, Acoustic Guitar, Synth Lead and Woodwinds. The instruments also come with over 400 rhythmic and melodic patterns so that anyone can compose high-quality grooves in seconds right out of the box.
Users can expand their sonic palette to over 400 instruments and 900 patterns by accessing the in-app store where they can find 16 categories of sounds covering the entire set needed for the most demanding live players and producers: Pianos, Organs, Strings, Basses, Guitars, Drums, Synths, Woodwinds, Brass, Ethnic Instruments, Percussion and more all instantly accessible from right inside the app. Single instruments categories can be added for only $4.99/€3.99 or as a complete collection for a discounted price of only $39.99/€31.99, a fraction of what instruments with an equivalent quality would cost as regular software or hardware instruments. Free version users can also upgrade to all the sounds included in the regular version of SampleTank for only $9.99/€7.99.
Both in the free and in the regular version, users can access three main sections of the app:
Pricing and Availability:
SampleTank Free for iPhone/iPod touch is now available on the iTunes App store.
The regular version of SampleTank with 72 built-in sounds is also available for an introductory price of only $9.99/€7.99.
A universal iPad version of SampleTank is also in development and will be available soon. Current users of SampleTank for iPhone / iPod will be able to update to this version for free when it becomes available.
iRig MIDI, the Core MIDI interface for iOS, is already shipping and is available for only $69.99/€54.99 in selected music instruments and electronic retailers. Owners of iRig MIDI also get an exclusive sound-set of 48 sounds to use in SampleTank for free simply by registering.