User's Manual

T-0000-0004-V2.1: Using Mozart II
T-0000-0004-V2.1: Using Mozart II Page: 5 / 24
It is important to note that the integrity of the audio outputs cannot be guaranteed while the module
initializes. The module has a MUTE signal that must be used to physically remove the signal at places
where it would be audible (namely, the audio amplifier). The MUTE signal is raised as soon as the
module is not outputting any sound on its audio outputs in standard software deliveries. It is highly
recommended to design the external circuitry with an amplifier that supports built-in muting instead of
using additional circuitry.
The following drawings illustrate how to use outputs from the module in various cases. The simplest
possible equipment has only internal speaker; if the device is monophonic then left and right channels
must be mixed before use – the output from the module will always be stereo; using only one channel
will not be sufficient.
Adding headphones output is only at cost of the connector (the internal amplifier can be mono or
stereo of course). However, this configuration does not allow automatic cutoff when headphones are
plugged in:
If cutoff is required, it must be either managed outside of the module, or the following scheme can be
used. In this case, impedance match at amplifier input is different from the LineOut feed: