Used to indicate the read-write support level for the Control.
RO means the CUR Property is implemented as Read-Only and the NEXT Porperty is not implemented.
RON means the CUR Property is implemented as Read-Only and the NEXT Porperty is implemented (always Read-Write).
RW means the CUR Property is implemented as Read-Write and the NEXT Porperty is not implemented.
RWN means the CUR Property is implemented as Read-Write and the NEXT Porperty is implemented (always Read-Write).
Source
<xsi:element name="level" type="audioRoWIntControlType"><xsi:annotation><xsi:documentation>All Level Controls shall have the same ranges properties. Therefore, the Level Control is advertized only once.</xsi:documentation></xsi:annotation></xsi:element>
<xsi:complexType name="graphicEQType"><xsi:annotation><xsi:documentation>Describes a read-only or read-write Graphic Equalizer Control.</xsi:documentation></xsi:annotation><xsi:sequence><xsi:element name="level" type="audioRoWIntControlType"><xsi:annotation><xsi:documentation>All Level Controls shall have the same ranges properties. Therefore, the Level Control is advertized only once.</xsi:documentation></xsi:annotation></xsi:element><xsi:element name="filters"><xsi:complexType><xsi:sequence><xsi:element name="frequency" type="positiveInt" maxOccurs="unbounded"/></xsi:sequence></xsi:complexType></xsi:element></xsi:sequence></xsi:complexType>