Sierra Wireless MC5725 Hardware Integration Manual page 59

Rev 1.9.1 Feb.09
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Audio path mixing—required for voice memo recording
•
and playback via multiple audio paths
Transducer interface—host provides acoustic drivers, must
•
occur outside of path switching and mixing
These functions can be performed in either host or module
codec, depending on balance of component selection and
engineering resources:
Volume settings—adjustable gain settings based on user
•
interface selections
Sidetone—careful placement of sidetone gain control is
•
required to prevent the need to adjust sidetone gain with
varying volume settings
Proprietary and Confidential
Audio Interface
59