iOS SoftwareJust In

4Pockets Weekend Price Drops

Here are this weekend’s price drops ending June 24th.

  • PolyPipe – $14.99 to $8.99
  • MeloVox – $14.99 to $8.99
  • FontStack – $14.99 to $8.99
  • DigiStix 2 – $14.99 to $7.99

PolyPipe

PolyPipe is an AUv3 MIDI Sequencer plugin for iOS which can be loaded into your favorite DAW. It comprises elements of some of my favorite sequencers of all time, all rolled into a single interface.

PolyPipe is a multi-lane, polyphonic sequencer designed for creating evolving musical patterns rather than fixed, repetitive loops. Instead of thinking in terms of a single step sequence, PolyPipe lets you build multiple independent lanes, each with its own rhythm, pitch logic, octave behavior, probability, and modulation data all running together as a coherent musical system.

At its core, PolyPipe takes incoming MIDI notes (or internally generated notes) and uses them as a musical “seed.

These notes are then processed through patterns, scales, transposition rules, and step logic to generate new musical phrases in real time. This makes it especially suited for generative music, complex arpeggiation, bass-and-chord splitting, and long-form evolving sequences.

Each lane in PolyPipe is its own sequencer voice. A lane contains one or more patterns, and each pattern is made up of steps. Steps don’t just define when a note plays they can also define how it plays. A step can include pitch offsets, velocity, gate length, strumming, probability, repeats (ratchets), ties for legato behavior, and even chord information.

Patterns can be enabled or disabled independently, shifted by octaves, and combined with global transposition. Because lanes can have different lengths, directions, and step modes, the resulting sequences naturally phase against each other, creating variation without manual intervention.

PolyPipe applies musical logic at the MIDI output stage rather than hard-coding notes upfront. Pitch values can be forced into a chosen scale and key, allowing even highly experimental patterns to stay musically coherent. Different step modes (such as forward, backward, ping-pong, random, chord, bass, or hybrid note/chord modes) let each lane behave differently, from traditional arpeggios to controlled chaos.

PolyPipe Sequencer is built for musicians who want to explore ideas quickly, create unique patterns, and discover results they wouldn’t think to program manually. It rewards experimentation: small changes to probability, repeats, or step logic can dramatically alter the musical output while staying rhythmically locked and musically usable.

MeloVox

MeloVox is a vocal harmonizer designed to allow up to 5 simultaneous harmonies. You can choose to have MeloVox automatically generate harmonies by listening to live input and creating harmonies based on the pitch of the incoming vocal, or you can use MIDI input to choose how to pitch the harmonies.

You can choose from one of two algorithms, one more suitable to vocals which includes formant preservation, and another more traditional option for instruments.

Unlike many pitch shifters, MeloVox is build on a phase vocoder capable of formant preservation, meaning much more natural sounding vocal harmonies. This is especially noticeable when pitching a vocal up an octave, which results in what is often called the Mickey Mouse effect. This is due to the fact that all frequencies are transposed up, along with the respective peaks in harmonics. This results in a sound which the vocal tract is incapable of producing, so it no longer sounds like a natural voice. MeloVox fixes this issue by preserving the formants.

MelVox is capable of producing up to 5 additional harmonies on top of the original vocal, and how it does that is down to the control mode setting. There are 5 different modes to choose from including Auto Sense, Fixed Pitch and three MIDI controllable modes called Chords, Melody and Vocoder.

Auto Sense mode detects the frequency of the incoming vocal, and automatically harmonises using the specified key and scale. Fixed Pitch allows you to specify fixed offsets in a scale without the need to detect pitch. Chord and Melody modes use incoming MIDI data to precisely control the harmonies using MIDI notes from your master keyboard or DAW. And to top if off we have a traditional 12 band Vocoder which is incredibly easy to setup and use due to its internal carrier source.

MeloVox includes a build in noise gate to remove unwanted background noise that helps with pitch tracking, and a vocal doubler which adds a spacious stereo effect to any monophonic vocal. MeloVox also features a 10 Band EQ add a reverb. All effects can be applied to either the original vocal or just the harmonies.

A built-in preset manager helps organize presets into categories using drag and drop, and the Set List can be created to provide quick real-time switching between presets and snapshots during a live session. You can even add your own acapella vocals to test out presets as you create them.

FontStack

FontStack is a ‘fontastic’ new AUv3 plugin for iOS which can be loaded into your favourite DAW allowing you to utilise all those wonderful and nostalgic SF2 SoundFonts you’ve collected over the years.

The SoundFont standard was created back in the early 90s and made famous by the SoundBlaster series of sound cards. With the introduction of the Amiga, it spawned a host of musical creation tools called Trackers, which allowed the Amiga to load these SoundFonts and create sophisticated musical scores of 4 or 8 tracks. These days we don’t use this standard so much, but there is a wealth of free SF2 files available on the internet just waiting to be loaded into FontStack.

A SoundFont comprises a file with an .sf2 file extension. This file contains a set of samples, instruments, and presets. FontStack enables you to load one or more SoundFonts into its 4 layers, and use them in lots of creative ways.

You can stack layers to create a rich combination of multiple tones, or assign each layer its own key range on the keyboard to create virtual splits, or a mixture of the two. Each layer can also be assigned its own MIDI channel for true OMNI mode.

One great feature of FontStack is its ability to cache all your SoundFonts and the instruments they contain. This allows quick searching for specific instrument types without the need to physically search SoundFonts to find them.

Another great feature is the ability to optionally link to a remote folder containing a global set of SoundFonts, so that they can be shared between apps. Both internal and external SoundFonts and their instruments will be cached, and searching is just as easy as it is using internal SoundFonts.

DigiStix 2

DigiStix 2 is an AUv3 compatible drum machine and sampler plugin for your favourite DAW.

This new version of DigiStix brings some distinct advantages over its predecessor, most notably the ability to host up to 64 samples per drumkit with 5 layers per pad. The interface has been drastically redesigned for iPad to make better use of full screen mode, allowing a popular MPC style 4×4 pad layout with 4 banks of samples. Digistix 2 also allows greater control over the multi-sample layers, with the ability to individually control the volume levels and pitch of layers as well as global pitch and tune settings all from the new sample window.

Previously, each pad had effect sends for the internal reverb and delay effects, but this can now be routed to external busses 9 and 10 for processing using external effects.

The controller editing is now build into the main display and can be edited in place without the need to scroll the interface. It also now supports extra effect controllers. A new context aware control window allows you to quickly change pad settings without the need for popup windows.

DigiStix 2 now supports GM and original DS drum kit layouts, and includes a sophisticated multi-layer Auto Sampler, capable of recording new GM compatible drumkits automatically from your hardware. It is 100% backward compatible with the original app, and can be used as a drop-in replacement.

Drag and drop support now allows you to directly drop samples on specific layers, as well as preview and edit them directly. You can create new kits by simply combining banks from existing kits into one mega kit, or use our non destructive referencing to include sounds from other kits.

The randomize feature has been enhanced so you can randomize individual instruments or within specific banks. The new continuous MIDI learn mode makes custom mapping a breeze.

Patterns can also be exported as MIDI stems for use in other packages including a direct import to Helium clips. You can also export patterns as audio in the latest version.

The auto sample feature allows automated recording of GM compatible kits directly from hardware drum machines. The slice editor can also be used for MPC style slicing of audio clips.

For more information on these and other 4Pockets apps, click here: 

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Tags: app, auv3, drum machine, harmonizer, ios, ios app, ios music production, ipad, iphone, sequencer, soundfont player, vocal harmonizer

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