From Nordic: "Bluetooth Low Energy virtual drumkit allows drummers to practice anywhere by creating authentic sounds from sensor-tracked stick movements"

Oct 5, 2018
 

Nordic Semiconductor today announces that Freedrum, a Sweden-based startup, has selected Nordic’s nRF52832 Bluetooth® Low Energy (Bluetooth LE) System-on-Chip (SoC) to provide the wireless connectivity for its ‘Freedrum’ virtual drumkit.

 

In the optimal set-up, Freedrum comprises four compact (80 by 22 by 9mm) and lightweight (16g) wireless devices fitted to the pair of drumsticks and the user’s feet, connected to an iOS-, macOS-, and Android-based partner app using Bluetooth LE wireless connectivity provided by the Nordic SoC.

 

Built-in gyroscopes and accelerometers track the direction and angle of the drumsticks’- and the drummer’s feet-movement then detect ‘impacts’ that translate to actual drum sounds. Freedrum then transmits the data via MIDI over Bluetooth LE to a paired Bluetooth 4.0 (and later) smartphone or tablet, allowing the user to play their virtual drumkit anywhere and listen live to the generated audio. Musical Instrument Digital Interface (MIDI) is a technical standard that describes a protocol, digital interface and connectors, and allows a wide variety of electronic musical instruments, computers, and other related devices to connect and communicate with one another.

 

The nRF52832 SoC’s powerful 64MHz, 32-bit Arm® Cortex® M4F processor (combined with large capacity 512kB Flash memory and 64kB RAM) has ample power to cope with the complex Floating Point (FP) computations necessary to run Freedrum’s detailed angle-tracking algorithms at high speed, manage its raw sensor values, and supervise the Bluetooth LE RF protocol software. The data is then relayed via low latency Bluetooth LE wireless connectivity to the user’s smartphone, where the drummer can use the Freedrum app to listen to the beats and view the positions and directions of drumsticks in relation to the virtual drum zones they are hovering over or striking.

 

The Freedrum app features six ‘hit areas’—snare, floor tom, ride cymbal, high tom, crash, and hi-hat—while the user can also open the hi-hat with their left foot and operate the bass with their right foot. Each device employs a 200 mAh LiPo battery that lasts approximately two weeks between recharge when played for one hour per day, thanks in part to the nRF52832’s ultra low power consumption.

 

Nordic’s unique software architecture provides clear separation between Nordic’s S132 SoftDevice (RF protocol software) and Freedrum’s application code, easing product development. The S132 SoftDevice is a Bluetooth 5-certifed RF software protocol stack for building advanced Bluetooth LE applications. It features Central, Peripheral, Broadcaster and Observer Bluetooth LE roles, supports up to twenty connections, and enables concurrent role operation.

 

Nordic’s nRF52832 multiprotocol SoC combines the Arm Cortex M4F processor with a 2.4GHz multiprotocol radio (supporting Bluetooth 5, ANT™, and proprietary 2.4GHz RF protocol software) featuring -96-dB RX sensitivity, with 512kB Flash memory and 64kB RAM. The nRF52832 SoC supports over-the-air device firmware updates (OTA-DFU) enabling in-the-field firmware enhancements

 

“The fast CPU, large memory capacity, and quality of Nordic’s Software Development Kits [SDKs] and documented example code during the development and testing process were all major factors in Freedrum’s decision to select the Nordic SoC,” says August Bering, Founder/Inventor of Freedrum. “We also appreciate the unique level of customer and development support offered by Nordic’s DevZone.”

 

Source: https://www.nordicsemi.com/eng/News/News-releases/Product-Related-News/Bluetooth-Low-Energy-virtual-drumkit-allows-drummers-to-practice-anywhere-by-creating-authentic-sounds-from-sensor-tracked-stick-movements 

 

Looking to integrate Nordic products with your design? Our Applications Engineers offer free design and technical help for your latest designs. Contact us today!

 


 

Symmetry Electronics Logo

 

Why partner with Symmetry Electronics? Symmetry's technical staff is specially trained by our suppliers to provide a comprehensive level of technical support. Our in-house Applications Engineers provide free design services to help customers early in the design cycle, providing solutions to save them time, money and frustration. Contact Symmetry for more information.



Subscribe

Sign up to get tech news, product updates and store promos from Symmetry Electronics.

Subscribe

Blog Archive

  2019
  2018
  2017
  2016
  2015
  2014
  2013
  2012
  2011
  2010
  2009

Previously Viewed Products