If you're a worship keyboard player using the Sunday Keys App, you already have access to hundreds of professionally designed sounds. But one of the most powerful features of the app often flies under the radar:
  
Plugin Hosting.
  
On iPad, the Sunday Keys App lets you load AUv3 instrument plugins directly inside your worship patches. On Mac, you can host both AUv3 and Audio Unit (AU) instruments, opening the door to a massive ecosystem of third-party sounds.
   
That means your favorite virtual instruments, from iPad plugins to studio staples like Keyscape, Kontakt, Omnisphere, and Spitfire Audio libraries, can all become part of your Sunday Keys workflow.
   
One of the newest additions to the growing AUv3 ecosystem is RetroKeys from AudioKit.
  
After spending some time exploring it, here's why it might be one of the most enjoyable electric piano plugins available for iPad worship musicians.
   

What Is RetroKeys?

RetroKeys is an AUv3 virtual instrument for iPad focused entirely on vintage keyboards.
   
Instead of creating new synthesizer sounds, it recreates four classic instruments including:

• Vintage Rhodes-style electric piano
• Wurlitzer electric piano
• CP-style electric grand
• Vintage upright piano

   
The plugin combines sampled instruments with physical modeling, resulting in expressive instruments that feel remarkably dynamic while keeping the entire library incredibly small.
    
For and iPad based keys rig, that's a huge advantage.
   
You get realistic electric pianos without filling your device with huge sample libraries.