The ATEM Microphone Converter features a familiar converter based design that has space for the analog electronics required for high quality analog to digital audio conversion (ADC). It features combined XLR/TRS input sockets allowing both XLR or jack cables to be connected. It also includes a MADI output with the converted audio, as well as a MADI input which allows multiple ATEM Microphone Converters to be daisy chained so more than 4 channels of audio can be embedded into a single MADI connection. There is also a 12V DC power connection plus USB and Ethernet for allowing remote admin and software updates. Switches allow control of mic/line audio input levels and to turn on phantom power.
MADI, or Multichannel Audio Digital Interface, is a multi channel audio link standardized as AES10 by the Audio Engineering Society (AES) and it defines the data format for an interface for multiple channels of digital audio. The ATEM Microphone Converter’s MADI output embeds the 4 analog inputs as MADI channels 1, 2, 3 and 4. ATEM Microphone Converter also includes a MADI input, which is used to loop multiple converters when you need more than 4 channels of audio on a single MADI link. This means if a second converter is connected to the input of another, the upstream converter will stack its 4 channels above the 4 channels on the downstream converter.
Each analog input channel has an ultra low noise, fixed gain preamplifier scaled to drive a high dynamic range audio ADC, which totally eliminates using an analog microphone preamplifier in the design so the input does not suffer from preamp gain step clicks or "zipper noise". The ATEM Microphone Converter steps outside conventional audio industry design practice of using an individual audio ADC, as each input implements analog to digital conversion using 8 high dynamic range audio ADCs that function collectively as one ultra high dynamic range audio ADC. This means each input channel’s dynamic range is an incredible 131dB(A). Plus you get incredibly low distortion of only 0.002%.
A common problem with mic converters is the higher noise floor where electrical noise is generated in the preamplifiers. The ATEM Microphone Converter eliminates this problem by using a very different design where the input is converted directly using its ultra high dynamic range conversion so you pass RAW audio to the switcher where the switcher can then apply as much gain as required for the correct audio level. This means you don't get an injection of noise caused by an analog gain stage, so you get an extremely low fixed noise floor of -129dBV regardless of digital gain applied. You can then apply digital gain control, which is done in minute ±0.1dB gain steps that are totally inaudible!
With the wide dynamic range input that eliminates the need for an analog preamplifier, microphone levels are adjusted by a digital preamplifier gain stage that is extremely stable. Different microphone types and brands can vary widely in analog audio levels, so this digital gain stage allows compensation for the specific brand of microphone you use. Best of all, the digital preamplifier is processed in the full internal 32 bit RAW audio bit depth, so you're adjusting with much greater precision than the MADI audio standard can support. This results in an extremely clean and noise free gain stage. Then the final levels can be finessed on the ATEM audio mixer as you work.
The innovative design of the ATEM Microphone Converter also has other benefits, such as extremely precise matching between input audio channels. The multi ADC per input design technique means that each analog audio input has very similar specifications and tolerances so all input channels are statistically more uniform. Plus the unique 8 ADC input design will maintain a stable and consistent flat noise floor that won't experience the negative effects of noise floor level modulation that traditional staggered ADC designs suffer from. This means you get similar performance no matter what input you connect the microphone to, and even between multiple ATEM Microphone Converters.
ATEM Microphone Converter also includes an HDMI video monitoring output so you can connect a simple TV or computer monitor for a full status display! It includes 4 scrolling waveforms over the last 60 seconds of time, which is both informative and fun to watch! There are also audio meters to show the level at the input connector. Each channel also includes a custom label set via the software utility. There are also indicators to show the switch settings for mic/line input selection and phantom power. Plus if you daisy chain converters the monitoring output will adapt and display more than 4 channels. You can even set a converter name that will be displayed on the monitoring!
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