The next significant channel count that needs disambiguation from the user, is a four channel stream.
A four channel stream could contain the format of a four speaker Channel Based formats ( QUAD , 4.0 , LCRS ) but could also contain different formats of interleaved four channel Ambisonic audio (A-Format, B-Format). You can read more about AFormat and B-Format in the WORKING WITH AMBISONICS section of this user guide. The important thing to remember here is that confusing Ambisonic audio and Channel Based audio is a significant mistake, even though you might hear something ‘wide sounding’.
!> Do not confuse multi-channel based audio formats with multi-channel Ambisonic audio formats. They may have the same channel counts but are completely different!