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MT103 E-HD

By October 30, 2016 November 3rd, 2020 No Comments
MT103 Video Conferencing Equipment Chip

MT103 E-HD

The MT103 E-HD provides a complete hardware/software platform solution that will let you design, tune, and build your own audio solution. Phoenix offers a large library of algorithms to run on the MT103 E-HD.

Noise Cancelling

Filters out ambient room noise such as air conditioning and background office or traffic noise

Acoustic Echo Cancellation

Prevents your microphone from transmitting the voice picked up from your speaker

Automatic Gain Control

Automatically adjusts your microphone sensitivity so that you are heard loud and clear regardless of your tone and distance from the device


Improves audio pick up quality in reverberant rooms with hard reflective surfaces such as exposed, concrete, marble, or glass walls and ceilings

The MT103E-HD is a dual microphone, single output, stereo, 16KHz Noise Canceling / Echo Canceling solution

The MT103E-HD utilizes your own microphone and own loudspeaker. It provides both analog and digital outputs.

Both the microphone(s) and the far-end inputs are connected through a 0.1” pitch header. User can design the board to mount on its motherboard with mating connector, or connect to the MT103 through wires.

Controllable input level and phantom power supply via free downloadable utility.

Analog output through a 0.1” pitch header. User can design the board to mount on its motherboard with mating connector, or connect to the MT103 through wires. digital output through USB connection.

Phoenix’s proprietary echo canceling, noise canceling, and AGC algorithms with no gating, to prevent the loss of critical information.

OEM Turnkey:  Custom DSP

Phoenix Audio Technologies provides robust noise cancelling microphones, echo cancelling microphones, echo and noise cancelling microphones beamforming mic arrays, directional arrays, and audio DSP boards flashed with customized algorithms for voice intelligibility solutions.



Microphone inputs connected to pins 1 and 2 of J1. The following microphone settings are available using the setup software:

o Mic level (280mV peak-to-peak)
o Line level (2V peak-to-peak)
o add 6dB boost
o Optional 2.8V power supply (phantom) , via 1Kohm resistor

*Units are preset to Mic level without 6dB boost; Phantom On

Note: user can use a single microphone connected to either pin 1 or pin 2 of J1

o Far-end inputs connected to pin 3 and pin 4 of J1. The input setting is Line level (2V peak-to-peak)


System Output connected to the pin11 of J1. The following output settings are available using the setup software:

  • Line level: 2V peak-to-peak
  • Mic level: 200mV peak-to-peak
    *Units are preset to Line level

Note: Output will be transmitted through the USB channel if it’s active

Speakers – (Far-end out signal) is connected to pin 13 and pin 14 of J1. The output setting is Line level: 2V peak-to-peak


32KHz sampling frequency; 100Hz-16KHz bandwidth

Two levels of Echo Canceling aggressiveness and three levels of Echo Canceling speed.

Controllable tail length – up to 220 ms.

Three levels of noise reduction: 8dB (Low), 14dB (Medium), and 20 dB (High), selectable through the free control software

Residual noise suppressed to the environment noise level to prevent pumping noise

Eight preset color filters for both the output and the speaker signal

Low latency (10msec)

MT103EHD User Manual