ESI Xkey 37 – Ultra-slim MIDI controller with aftertouch
The ESI Xkey 37 is a professional MIDI controller featuring 37 full-size dynamic keys with polyphonic aftertouch. With its ultra-slim anodized aluminum design and USB-C connectivity, it’s fully compatible with Windows, macOS, iOS, iPadOS, Android, and Linux. Touch-sensitive controls for pitch bend, modulation, sustain, and octave shift make it ideal for both studio use and live performance. Includes Xcable adapter and licenses for Bitwig Studio, Cubasis LE, and WaveLab LE.
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ESI Xkey 37 – ultra-slim MIDI controller with aftertouch
The ESI Xkey 37 is a professional MIDI controller that combines remarkable portability, sleek design, and top-quality performance. Equipped with full-size dynamic keys with polyphonic aftertouch, it is the perfect tool for musicians, producers, and composers who value expressive playability and compact gear. Whether you’re in the studio, on stage, or on the go – the Xkey 37 delivers everything you need.
Product features
- 37 full-size keys with dynamic sensitivity and polyphonic aftertouch
- Ultra-thin design – only 16 mm thick
- Durable anodized aluminum housing – lightweight and stylish
- Pitch bend, modulation, sustain, and octave shift functions via touch-sensitive buttons
- USB-C powered – no need for external power supply
- Fully compatible with Windows, macOS, iOS, iPadOS, Android, and Linux
Mobility meets professional functionality
The ESI Xkey 37 is designed for musicians who need reliable gear on the move. Its anodized aluminum casing not only gives it an elegant look but also provides extra durability. Thanks to its compact size and USB-powered design, it’s a perfect portable companion for creative work anywhere, anytime.
Use cases
The Xkey 37 is an excellent choice for those in need of a professional yet compact MIDI controller. Perfect for electronic music production, composition, arranging, and live performance. The integrated polyphonic aftertouch lets musicians express subtle nuances with precision, making it a truly expressive instrument.
Technical specifications
- Dimensions: 553 x 135 x 16 mm
- Weight: approx. 1 kg
- Power supply: USB bus-powered
- Port: USB-C
- Compatibility: Windows, macOS, iOS, iPadOS, Android, Linux
- Aftertouch: Polyphonic
- Key type: full-size, dynamic
Materials and construction
The controller’s body is made from anodized aluminum, ensuring both aesthetic appeal and structural durability. The keys are ergonomically designed to offer a comfortable and responsive playing experience.
Included in the box
- ESI Xkey 37 MIDI controller
- Xcable adapter (DIN 5-pin, sustain, expression)
- USB-C to USB-A cable
- Software licenses for: Bitwig Studio 8-Track, Steinberg Cubasis LE (iOS), WaveLab LE
Summary
The ESI Xkey 37 is a versatile and elegant MIDI controller that will meet the needs of even the most demanding musicians. It's an excellent option for those who value portability, aesthetic design, and expressive performance.
Product delivery details ESI Xkey 37 – Ultra-slim MIDI controller with aftertouch
Shipment from Warsaw, Poland.
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ESI Xkey 37 – Ultra-slim MIDI controller with aftertouch - Frequently asked questions.
Does the ESI Xkey 37 have full-size keys?
Yes, it features 37 full-size keys with dynamic sensitivity.
Does it support aftertouch?
Yes, the Xkey 37 includes polyphonic aftertouch for expressive control.
Which operating systems are supported?
It is compatible with Windows, macOS, iOS, iPadOS, Android, and Linux.
What type of port does it use?
It uses a USB-C port for power and data.
What software is included?
Licenses for Bitwig Studio 8-Track, Steinberg Cubasis LE (iOS), and WaveLab LE.
What is the weight of the controller?
Approximately 1 kg.
Does it require an external power supply?
No, it is USB bus-powered.
Can I connect a sustain pedal?
Yes, via the included Xcable adapter.
What material is the housing made of?
It is made from anodized aluminum for a durable and sleek design.
Can I use it with mobile devices?
Yes, it works with iOS, iPadOS, and Android devices.
About manufacturer ESI

ESI jest to niemiecka marka stworzona w 2006 roku, jako część założonej w 1998 roku przez Clausa Riethmüllera firmy RIDI multimedia GmbH. W 2013 roku obie marki zostały ostatecznie połączone i znane są pod nazwą ESI. Firma zajmuje się tworzeniem wysokiej jakości sprzętu audio w przystępnej cenie, tak aby każdy muzyk mógł się cieszyć doskonałym urządzeniem. Marka chętnie współpracuje z licznymi artystami, dlatego od ponad 20 lat dostrcza innowacyjny sprzęt, który spełnia oczekiwania i wymagania w 100%. W swoim instytucie badawczym w Stuttgarcie firma stale używa najnowszych technologii, aby rozwijać się i tworzyć trwałe i innowacyje rozwiązania.
Company
- Manufacturer's headquarters: Germany
Products
- Product count: 30
- Available product count: 20