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nRFready Microphone User Guide
1 Introduction
The nRFready Microphone Reference Design Kit is a complete hardware and firmware reference design
for a dual 2.4 GHz RF wireless microphone set. Moreover this design is a completely wireless RF solution.
This means you are not inconvenienced by cables that curl, form knots, or cause people to trip.
Furthermore, RF doesn’t require line of sight to operate, as infrared (IR) solutions do.
This reference design is an ideal starting point for developing wireless microphones for gaming, home
karaoke and conference room microphone applications. Jointly developed by AKM Semiconductor and
Nordic Semiconductor, the nRFready Microphone is based on the Nordic Semiconductor nRF2460 2.4
GHz RF mono audio streamer and AKM Semiconductor audio converters.
The Reference Design Kit is delivered programmed and pre-paired, and there is no special user procedure
required to start evaluating the nRFready Microphone design. Follow the Getting Started Guide to quickly
set up the Kit to start streaming audio from two microphones to one receiver.
The Kit includes two microphone boards, a receiver board with both analog and USB audio interface, plus
a complete set of design files, source code and documentation.
The nRFready Microphone Reference Kit Design has the following key features:
• Complete reference design for a dual 2.4 GHz RF microphone system
• Uncompressed 16-bit digital audio
• 32 kHz sampling rate
• Programmable latency from 20 to 26 ms
• Excellent battery lifetime
• Low-cost Bill of Material (BOM)
• 2 microphone boards with microphone pre-amp input
• 1 receiver board with analog and USB output
• Downloadable full source code, hardware designs files and documentation
1.1 Who should read this User Guide?
Anyone developing a wireless microphone design using the nRF2460 should read this User Guide. To fully
understand this User Guide a background in software development and/or electronic engineering is
required.
1.2 System requirements
To use the nRFready Microphone Reference Design Kit you need the following:
• Computer with USB port or audio amplifier with analog input
• Microphone or MP3 player with mini-jack output
1.3 Required reading
To use the Kit as is, you need only to read the Getting Started Guide. To develop or customize the Kit, the
product specifications for the various ICs used on the boards must also be read.
