Audio output level control
All output channel levels will be
accessible through
the admin web page via
(
X's represents the serial
number of the ATOM and can be found on a label on
the underside of the ATOM)
.
A log in screen will require
the following case-sensitive default credentials:
• Username: admin
• Password: first four and last four digits of the
device serial number
After accessing the admin page and navigating to the 'Audio' section, all analog outputs should be visible. Whenever a
digital audio output, such as USB or HDMI is connected, it will also be visible with a separate level control slider. Note
that the web page may require a refresh in order to display recently connected audio devices. It is recommended to
leave all level control faders at 100%, to maintain unity gain throughout the signal chain.
Crowd Mics system latency
While time sensitive audio network protocols mostly require a physical network medium to transmit data fast and
reliably, Crowd Mics has been designed to work on wireless networks in order to let the audience participate with their
personal devices. But the increased versatility does come with a cost. In comparison to category cable or fiber network
links, wireless networks will introduce additional delay to any communication between Ethernet devices. Crowd Mics is
designed to keep the audio latency as low as possible, whilst providing a professional grade 48kHz sampling rate and
being bandwidth efficient and lightweight to the local wireless network.
The expected audio latency (from smartphone input to analog output) ranges from 55ms (best) to 70ms (typ.). Note that
the the network performance, diameter and occupation of WAPs can have a direct effect on audio latency and is difficult
to predict.
Distance conferencing applications
Some Crowd Mics deployments may not only route the participants voice to the local audio system, but also to a remote
connection via video conference or a voice-only codec. A typical application would be a meeting or congress
broadcasted to remote participants through a collaboration software. Such a near-end / far-end communication scenario
typically requires Acoustic Echo Cancelation (AEC) to avoid incoming audio from the far-end (the remote participant)
being picked up by a microphone and transmitted back to the far-end.
Please be aware that the requirement of adding AEC processing to the Crowd Mics signal path might be an edge case,
out of the following reasons:
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