4ChordsStudios

Press kit

SUS4 by 4ChordsStudios

4ChordsStudios is a one-person studio in Telford. It makes the SUS4 suite: 22 apps for iPhone, iPad and Mac, and 25 plugins for macOS, Windows and Linux. Every app runs on the device, with no account and no cloud processing.

The apps: fact sheet

Apps
22, all current
Platforms
iPhone, iPad and Mac. 12 of the apps also run on Apple Watch.
What they cover
Tuning, timing, ear training, chord recognition, transcription, sight reading, songwriting and practice.
Privacy
Audio is analysed on the device. No account, no login, no audio uploaded.
Languages
50 App Store languages
Price
Free to download; Pro features from £0.99/month per app, £4.99/month for all apps, or £59.99 lifetime.
Trial
The Pro trial is offered once you have used the app. The paywall shows the date it ends and the app sets a reminder before it does. No card details are taken up front.
Where
App Store, on sale in 175 countries and regions

All apps on the App Store or the app pages on this site.

What is new in 1.3.0

Most of the apps gained a short practice game built into the tool, rather than one headline feature.

  • Tuner has long tones: hold a note for 4, 8 or 12 seconds and see how steady it stayed, plus a map of the notes you tend to play sharp or flat.
  • Metronome scores each of your hits against the click after a count-in.
  • Chord ID asks you to name the chord you hear, or to call as many changes as you can in a minute.
  • Transcribe has Mystery Tune: work out a chord progression bar by bar from the home chord.
  • Mix Check is an ear game for engineers: name the frequency band that was boosted or cut.
  • Drum Pad plays a groove, then you play it back.
  • Setlist opens a song in another SUS4 app with its key, tempo, capo and tuning already set.
  • All-Access gains an annual plan next to the monthly plan and the lifetime purchase. 50 App Store languages.

Per-app release notes are on the changelog.

The plugins: fact sheet

Plugins
25 in one suite, current release
The idea
Each plugin works as a clean, predictable tool. Each also has a Sus switch that changes what it does: the compressor turns into a negative compressor, the reverb swells in before the note, the gate cuts rhythmic holes through the loudest hits.
Formats
macOS (universal, macOS 12 or later): VST3, AU and AUv3. Windows 64-bit: VST3. Linux x86_64: VST3.
Not supported
No AAX, CLAP or VST2, and no standalone app.
Pricing
Free to download; Pro features by subscription. One licence covers all plugins.
Trial
Seven days, started on the plugins page. A card is needed and is not charged for seven days. Without a licence the plugins pass audio through untouched.
Demo audio
Clean and Sus audio for Aurum 670, Bond 609, Compressor, Delay and Reverb, on each plugin page.

All plugins, DAW compatibility and pricing.

Screenshots

One App Store screenshot for each app. Click an image to open the file. 1024 pixel app icons and the other App Store frames are available from the address below.

Every app

Full-size screenshot files:

Plugin editors

Contact

4ChordsStudios, Telford, Shropshire, UK. [email protected]