Remote Lecture System Design - Sony MAS-A100 Manual

4.5. Remote lecture system design

This section describes an example of a remote lecture system design.
The Rec output for audio capture of the MAS-A100 is used for sending audio to a
remote destination. Sending the Main output for speech reinforcement to a remote
destination is not recommended.
For details about audio capture design and important points, see "Small-scale audio
capture system design" (page 32). For details about speech reinforcement design and
important points, see "Speech reinforcement system design" (page 34).
A remote conferencing system includes non-linear and non steady-state processing,
such as echo cancelers and codecs, that can cause audio interruptions with respect to
the MAS-A100 signal processing, adversely affecting audio quality. Before use, initiate
a conference call and check that the sound quality is sufficient.
Remote lecture using analog connection of two MAS-A100 units
This section shows an example connection of an existing analog speech reinforcement
device with an existing remote communication device.
The Main outputs from two MAS-A100 units are converted to two analog signals by
D/A conversion using the ADP-DAO-AU-0x2. The signals are mixed 1:1 using a
fixed-gain mixer, unity gain mixer, a microphone combiner, or splitter cable. The mixer
41