What attributes are retrieved with ALC_ALL_ATTRIBUTES?

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Table 6.1 in the spec lists five attributes used in context
creation: ALC_FREQUENCY, ALC_REFRESH, ALC_SYNC, ALC_MONO_SOURCES and
ALC_STEREO_SOURCES.

However, after context creation there appears to be one extra attribute you
can query for:

// Size of the array required to hold the key/value pairs plus terminating 0
ALCint attributes_size;
alcGetIntegerv( device, ALC_ATTRIBUTES_SIZE, 1, &attributes_size );
std::vector< ALCint > attributes( attributes_size );
alcGetIntegerv( device, ALC_ALL_ATTRIBUTES, attributes_size, &attributes[ 0
] );

On my OpenAL Soft 1.14 install attributes_size is 13 which implies room for
six attribute key/value pairs, plus the terminating zero.

What (if any) is the sixth attribute returned by ALC_ALL_ATTRIBUTES?
Iterating over the values returned, it seems there probably isn't one as
the values for the sixth are always random, but I just want to be sure I'm
not missing something.

Thanks!

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<div dir=3D"ltr"><div>Table 6.1 in the spec lists five attributes used in c=
ontext creation:=A0ALC_FREQUENCY, ALC_REFRESH, ALC_SYNC, ALC_MONO_SOURCES a=
nd ALC_STEREO_SOURCES.<br></div><div><br></div><div>However, after context =
creation there appears to be one extra attribute you can query for:</div>
<div><br></div><div>// Size of the array required to hold the key/value pai=
rs plus terminating 0</div><div>ALCint attributes_size;</div><div>alcGetInt=
egerv( device, ALC_ATTRIBUTES_SIZE, 1, &amp;attributes_size );</div><div>
<div>std::vector&lt; ALCint &gt; attributes( attributes_size );</div><div>a=
lcGetIntegerv( device, ALC_ALL_ATTRIBUTES, attributes_size, &amp;attributes=
[ 0 ] );</div></div><div><br></div><div>On my OpenAL Soft 1.14 install attr=
ibutes_size is 13 which implies room for six attribute key/value pairs, plu=
s the terminating zero.<br>
</div><div><br></div><div>What (if any) is the sixth attribute returned by =
ALC_ALL_ATTRIBUTES? Iterating over the values returned, it seems there prob=
ably isn&#39;t one as the values for the sixth are always random, but I jus=
t want to be sure I&#39;m not missing something.</div>
<div><br></div><div>Thanks!</div></div>

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