MidiStep is a powerful polyphonic step sequencer designed for those who love complex rhythms and want to explore generative music creation tools. With MidiStep, you can enjoy sophisticated randomization, which allows you to generate notes based on a variety of parameters, including note values, note length, chords, patterns, velocity, gate, dividers, repeats, swing, and more.

One of the key features of MidiStep is that you have complete control over the randomization on a step-by-step basis. This means you can create patterns that have little or no variation or those that keep a recognizable structure with some slight changes in notes or velocity. You can even create patterns that exhibit extreme randomness with every pass. The level of randomization is entirely up to you for each parameter and each step of your pattern.

The app supports per-step polyphonic chord playback and offers variable step sequence lengths for all its parameters, such as pitch, octave, velocity, and note duration. This flexibility allows you to create multiple patterns that can be linked together in various ways, enhancing your creative possibilities.

Additionally, MidiStep features eight independent modulation lanes with independent play speeds, enabling you to automate parameters within your favorite synthesizers. This means you can adjust various elements of your music in real-time, enhancing your workflow and results.

Through its sophisticated randomization settings, MidiStep lets you customize note values, note lengths, velocity, gate, dividers, repeats, swing, pitch bend, and modulation. With different cycle lengths, step skips, jumps, rewinds, cursor positions, and octave shifts, you can craft an infinite number of non-repeating sequences. The randomization can be finely tuned to your preferences, allowing for a wide range of musical outcomes.

MidiStep also explores aleatoric music, or chance music, which lets you create patterns and entire compositions using user-controlled randomization. The term "aleatory" comes from the Latin word for dice, highlighting the element of chance in this music-making process. You can turn randomization on or off for almost all parameters, set the probability of randomization, and define minimum and maximum values for each aspect of your pattern. This creates unique aleatoric renditions that vary with each playthrough, making every performance a new experience.

The app provides features that cater to your creative needs. Each of the 16 sequences can have unlimited types and degrees of randomness that you control. There are eight independent sequencer lanes that handle notes, chords, octaves, velocity, gates, dividers, repeats, and delays, along with eight independent modulation sequencer lanes. You can create 16 patterns and switch between them in up to four ways, giving you flexibility in your music arrangements.

Each pattern can have up to 16 steps and cycles and support a maximum sequence length of 4096 notes. You can also independently manage the sequencer lengths for each lane, ranging from one to sixteen steps. With a master step cursor that operates independently of other lanes, you can precisely navigate your sequences.

MidiStep also includes independent randomization parameters for each of these 16 lanes, letting you define probabilities, minimum and maximum values, and whether steps will skip or repeat. This features an unlimited variety of sequences, from minimal variation to wildly different ones with every playthrough.

You’ll find rich musical resources within the app, like 126 scales and 126 chords in every key, complemented by a scale and chord editor for personalized compositions. MidiStep accommodates chord complexity for two to eight-note chords, where notes can either be specified or randomly generated. The app also features articulation options like block chords, strumming up and down, and arpeggiation, each with parameters for accent, length, speed, and random note order.

Furthermore, the master lane and chord lane previews offer clear ways to visualize your music. The pattern creator allows for automatic melody, chord, bass, and drum backing, while the auto-scroll chord lane keeps your chords in view.

With a seven-octave range for notes and chords, from C1 to C8, you can use both static and random octave offsets to enrich your sound. MidiStep provides 11 note lengths, from 1/32 note to four full measures, along with options for ties across notes, rests, repeated notes, and delays. You can also adjust swing with two types and an adjustable offset.

The app includes humanize settings for note velocity and timing, enhancing the expressiveness of your music. You can transpose sequences using a keyboard, making it easy to switch between mono for single notes and poly for chords.

In summary, MidiStep gives you the tools to create complex, dynamic musical sequences with sophisticated randomization, making it a great fit for any musician interested in pushing the boundaries of music creation.