Here are this weekend’s deals from 4Pockets, ending October 1st.
- PolyPipe MIDI Editor – $14.99 to $8.99
- MIDI Strummer – $12.99 to $6.99
- AUM Multitrack Recorder – $12.99 to $6.99
- QuadroSphere – $14.99 to $7.99
PolyPipe MIDI Editor
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.
MIDI Strummer
MIDI Strummer is an AUv3 plugin designed to simulate guitar strumming and picking techniques. It can used to generate MIDI note data which can be sent to either an external synth of choice or the internal soundfont engine.
The inbuilt soundfont player allows you to import all your favourite .SF2 and .DLS soundfonts and use them as a sound source. MIDI strummer has a set of 16 definable chord pads that can hold a series of chords, which in turn can be triggered remotely via MIDI messages or by tapping the pads.
Use the pattern editor to create a series of picking or strumming patterns that can be tranposed to the selected chord pad.
Song mode allows you to chain these chord patterns together to form songs combining both picking and strumming patterns within the same song. Enable 6/12 string on a particular part to emphesize a pert by adding depth.
Strummer also features a number of audio effects that can be used to enhance the audio from the soundfont player. These include overdrive, distortion, tremolo, chorus, phaser, graphic EQ, digital delay and reverb.
Multitrack Recorder
This is an AUv3 compatible Multi-Track Recorder plugin specifically designed for AUM and other DAW’s that don’t support audio recording capabilities.
MultiTrack can be used for a host of purposes such as a tool for recording and layering audio for export to other DAW’s , creating that perfect loop for other third party applications or recording vocal sessions to accompany you in AUM. Its uses are endless.
It features the ability to record up to 8 mono or stereo audio tracks per instance, with the ability to run multiple instances under the control of your host DAW. MultiTrack has the ability to run standalone using it’s own transport or synced to a host which allows synchronous control of multiple instances.
MultiTrack supports various recording modes including the ability to set punch in and out points for sample accurate recordings. Press the Host Sync in order to the advantage of the hosts transport controls or enable the remote button to enable host recording controls (great for NS2).
Use the Audio Pool window to quickly and easily import, export and perform mix-downs of audio clips. Quickly and easily move audio files using drag and drop to the time line or between the audio pool and the Files App. Imported audio is automatically converted to the projects sample rate. The audio pool also features the ability to copy and paste audio directly from the iOS pasteboard as well as preview and manage your data.
An intergrated 8 channel mixer allows you to control the level, pan and effect send levels. Although AUM allows some great routing options for third party effects, MultiTrack also includes an extremely CPU friendly beat synced delay and reverb which can be used where recording pre-effected instruments is not an option.
MultiTrack allows per clip volume level as well as being able to control start and end cropping and fade in/out on a clip by clip basis. All these operations are quick and easy to make using the touch screen alone.
Also included is the ability to perform operations such as splitting, normalising, reversing and time stretching of audio clips all with a multi-level undo built right in. A comprehensive set of selection, copying and duplication tools make editing a breeze.
Each track has it’s own mute, solo and metering which can also be used to monitoring incoming signal levels. Finally you have the ability to mix down a selected range of your song or create perfectly looped samples for use in other DAW’s , samplers and drum machines such as DigiStix.
QuadroSphere
QuadroSphere is a great tool for bringing an instrument to life by creating a soundscape with a constantly moving sound source. QuadroSphere splits the incoming audio signal into 4 distinct coloured frequency bands using the frequency bar. Each band has an associated coloured sphere allowing you to control the pan, stereo separation and volume level.
You can use this plugin as a way to impose subtle control over stereo placement with little or no movement, or go crazy with random automation. Adding effects such as reverb or delay on a specific frequency band can help create a lush atmospheric swirling which surrounds the listener. This is great for musicians trying to create minimalistic ambient or tranquil soundscapes.
You can create up to 12 snapshots of the sphere parameters and effect settings, then morph between them at a designated speed (measured in beats). You can also enable continuous randomization mode, and have full control over which spheres and control which parts are automated.
You can also use QuadroSphere as a stereo splitter, using the additional outputs to add your own effects to band outputs.
For more information on these and other 4Pockets apps, click here:
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