…ng codecs other than the mandatory-to-implement codecs listed above, refer to [ RFC7875 ]. 4 . Audio Level It is desirable to standardize the "on the wire" audio level for speech transmission to avoid users having to manually adjust the playback and to facilitate mixing in confer…

…ng codecs other than the mandatory-to-implement codecs listed above, refer to [ RFC7875 ]. 4 . Audio Level It is desirable to standardize the "on the wire" audio level for speech transmission to avoid users having to manually adjust the playback and to facilitate mixing in confer…