I’ve posted about HyperTunes before, but now there’s HyperTunes LE, which is free, so if you were contemplating buying the full version you can now try it out first.
Here’s the app’s description:
HyperTunes LE (Lite Edition) lets you compose and arrange music based on structure, such as verse-chorus-bridge song form.
It is designed to enable you to focus on the big picture as you compose, and to make it much easier to try different arranging options than it would be working in a traditional sequencer timeline.
For example, you can work by starting with a song form and then plugging in instrument parts later, the way an artist might sketch out a piece before filling in the details.
Alternatively, you can design your song structure incrementally, adding one new section at a time in an exploratory manner.
You can rearrange the entire song in one step, just by selecting a different form from the extensive built-in menu, or by defining your own unique song form.
Plug instrument parts – drum grooves, bass lines, guitar and keyboad riffs – into the sections of your song at any time.
Modify the chords/keys of any section at any time. HyperTunes always tranposes the parts of your song to fit the currently associated chords.
But HyperTunes LE isn’t just about super-flexible arranging operations. It’s also about maximizing the accessibility of your content.
It lets you access all your MIDI content in just a few touches, so that you can easily share and reuse content between different songs and libraries.
Import any number of original music projects and commercial/free pattern libraries in General MIDI format.
HyperTunes LE has all the features of HyperTunes, except that arrangements cannot be saved or exported.