The Extron MVC 121 Plus is a compact, three input stereo audio mixer featuring a digital signal processing platform for audio signal mixing and control. The MVC 121 Plus features a stereo line level input and two mic/line level inputs with 48 volt phantom power for condenser microphones, plus fixed and variable stereo line level outputs. It offers gain, filter, tone processing, and parametric EQ. Quick and intuitive configuration using the DSP Configurator™ Software allows the MVC 121 Plus to be installed in very little time. The MVC 121 Plus is ideal for presentation applications that require line and microphone audio mixing with DSP in a small form factor.
Other Integrators recommend the Yamaha MG06X Mixer
Less expensive approaches include simply using a 3.5mm Y. Several universities have had success with that approach.
This approach is best implemented by a profession AV integrator. Care must be taken in the connections. If you are trying to connect to a DSP, connect the tip and the ring to Positive and Negative on the DSP.
Since June of 2019 we have successfully deployed many Voice Tracker microphones for a combination of teleconference and web conferencing rooms. In one specific not-for-profit location, they have had microphone issues in the space leftover from the original vendor. No amount of DSP and adjustments made the space usable for their purposes. We brought in Voice Tracker III to the space and they could not believe the difference in quality. With one microphone connected by the monitor, their entire room was picked up with a clarity they had not ever had in the space.
In my opinion the positioning of the Voice Tracker in the same audio plane of the meeting attendees gives an audio presence that no ceiling microphone has been able to capture. The fact that the Voice Tracker is a reasonable cost makes it an easy sell to the client after the demonstration.
Due to the NYC COVID 19 shutdown many universities we are working with are looking to create hybrid learning environments with Zoom. The Voice Tracker lends itself perfectly to these types of spaces, as many fit the size and price constraints we are being tasked with in the coming months.
323link was an early advocate of the combination of Zoom Rooms and Voice Tracker I array microphone to provide cost effective yet high performance video conferencing.
VoIP products like Zoom make video conferencing easy and affordable. At $279, the Voice Tracker I enhances that affordability, providing long pickup range and good sound quality at a price as much and 1/10th that of competitive array microphones.
The AEC in Zoom is robust enough so we don’t need the built-in AEC in the Voice Tracker II.
The Voice Tracker I is easy to set up and is extremely reliable, minimizing the need for IT support. We have had Voice Trackers installed for more than 8 years without problems.
A single Voice Tracker I can cover a 30 foot room, and two or more Voice Trackers can be easily combined for greater coverage.
The price/performance advantage of Zoom and Voice Tracker I has often encouraged our customers to install multiple rooms.
We have been using a Polycom SoundStation IP 6000 with two expansion mics for quite some time, but the far end participants complained that they had trouble hearing all the participants in the near end conference room. Our room size is 30×15.
Since we already had a Zoom VoIP, we tried calls using a Voice Trackerr, connecting it to the employees computers prior to making their Zoom call.
Our far end participants then reported that they could hear everyone in the room clearly, and we didn’t have to worry about people in the conference room moving the microphone close to them.
And with Zoom, we could do video as well as audio.
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Conference Room Systems is a well regarded AV integrator that puts together VoIP conferencing system packages for easy implementation n by its customers. These packages have been designed meticulously by their engineers and installers using only the best components available on the market. Voice Trackers are included in many of their packages.
We recently sat down with Conference Room Systems for a podcast about Acoustic Magic and our products:
We often get inquires on how to use the Voice Tracker II with iPads and iPhones for enhanced recording range, and for inexpensive conferencing/telemedicine.
There are two “tricks” for doing this.
First, a TRRS splitter is required. This is connected to the 3.5mm jack on the iPad or iPhone and creates separate 3.5mm connections for the mic and loudspeaker. See the photo of such a splitter. Such splitters are readily available commercially.
Second, the output impedance of the Voice Tracker II must be adjusted to match the expectation of the iPad/iPhone. These devices require an input impedance of less than 10Kohm. If the output impedance of the mic in higher than that, the iPhone/iPad will default to their internal mic.
The output impedance of the Voice Tracker II is higher than that, so an adapter is needed in the 3.5mm cable to reduce the output impedance to below 10K.
When the Voice Tracker is connected thru the TRRS splitter and impedance adapter, you can hear the improved pickup range:
Because the Voice Tracker II has built in acoustic echo cancellation, it can be used with iPads or iPhones for inexpensive conferencing. Connect the speaker jack from the TRRS splitter to the ref in jack on the Voice Tracker II, and connect an external powered computer loudspeaker to the speaker out jack on the Voice Tracker II. Provide power to the Voice Tracker II from USB battery, or a USB wall power supply. Then run a VoIP app on the iPhone or iPad.
See the photo below. Note the thicker 3.5 cable to the middle jack on the VT II (the audio out jack). That is the impedance adapter.
If you are using Zoom or Skype for Business as the VoIP App, they have good AECs, so the AEC in the Voice Tracker II is not required.
This reduces the number of cable connections (clutter). You can then connect the speaker jack from the TRRS splitter directly to the loudspeaker. See the photo below.
A well known eastern insurance company is employing Voice Tracker I microphones throughout cubicle areas to facilitate Skype for Business based collaboration meetings.
The Voice Tracker is mounted, together with a camera, on top of a large display monitor. A loudspeaker bar is mounted below the display.
Also below the display is a shelf to hold a laptop. The participants bring along their laptop, place it on the shelf, and connect it for the meeting. The team then stands around the monitor to engage in their conversation.
The Voice Tracker picks up the talkers around the monitor, and ranges of 25 feet or more, and with an extremely wide field of view.
The Voice Tracker I can be used since the AEC in Skype for Business is robust enough to adjust to the Voice Tracker’s listening beam as it moves rapidly from talker to talker. The Voice Tracker II can also be employed, using its own internal fast adapting AEC.
The Voice Tracker’s low cost make it possible to build several huddle areas on each floor.
These Universities Trust the Acoustic Magic Array Microphone for Their Lecture Recording!