mh acoustics’ em64 Eigenmike® spherical microphone array contains 64 professional-grade omnidirectional electret microphones mounted on a rigid spherical baffle. All electronics are inside the sphere. The patented design decomposes the soundfield into spherical harmonics of up to sixth-order HOA signals. The em64 is powered by Power-over-Ethernet (PoE+) using CAT5e or better ethernet cables. The em64 uses Audinate’s Dante protocol over standard Gb ethernet networks.

Microphone programmable gain preamplifiers, microphone boost, 24-bit A/D conversion and microphone calibration are done inside the em64 Eigenmike® array. The 64 calibrated microphone signals are available to a Mac or Windows PC by Dante’s virtual sound card (DVS). A coupon for the Dante Virtual Soundcard license is included.

Some technical highlights: maximum SPL 130 dB, frequency response 20Hz to 20kHz, sampling rate 48kHz, spatial aliasing cutoff frequency >12kHz, diameter of spherical baffle is 84mm, power consumption less than 10 Watts in PoE power.

For control, processing, and recording of the microphone signals, mh acoustics provides its native EigenStudio® application (macOS, Windows coming soon). A set of VST plugins is available for users who use a DAW application that supports 64 channels track width.

User Interface Screenshot   
em64 microphone

Digital Signal Processing, Acoustics and Product Design

mh acoustics has developed a number of proprietary technologies and products in the areas of microphone arrays, noise suppression, single and multi-microphone electronic wind-noise removal and multichannel acoustic echo cancellation.

The mh team has decades of experience in digital signal processing, acoustics and product design.

We have expertise in digital audio signal processing algorithms and techniques to solve acoustic problems in the following areas:

  • Microphone arrays
  • Adaptive beamforming
  • Acoustic echo cancellation and noise suppression
  • Electronic wind-noise reduction
  • Multichannel spatial noise suppression
  • Source localization

We are available for consulting to help you solve tough acoustics problems. Our proprietary and patented technology is available for licensing and integration into your product. mh acoustics’ small technology-focused company structure and technical depth guarantees a high degree of flexibility allowing you to bring state-of-the art products to the market faster with superior performance. 

Please contact us to discuss how we can be of assistance at

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