mingw 32bit:

[FreddieAkeroyd]

A 32bit mingw Appveyor build fails the testChannelAccess tests - the 64bit mingw build passes

testChannelAccess.tap ..... 
not ok 130 - void ChannelAccessIFTest::test_channelArray(): data slot 0 should be 1.100000
not ok 131 - void ChannelAccessIFTest::test_channelArray(): data slot 1 should be 2.200000
not ok 132 - void ChannelAccessIFTest::test_channelArray(): data slot 2 should be 3.300000
not ok 133 - void ChannelAccessIFTest::test_channelArray(): data slot 3 should be 4.400000
not ok 134 - void ChannelAccessIFTest::test_channelArray(): data slot 4 should be 5.500000
Failed 5/152 subtests 
	(less 12 skipped subtests: 135 okay)

[FreddieAkeroyd]

Adding addition debugging out produced

testChannelAccess.tap ..... 
not ok 130 - void ChannelAccessIFTest::test_channelArray(): data slot 0 should be 1.100000 not 1.100000
not ok 131 - void ChannelAccessIFTest::test_channelArray(): data slot 1 should be 2.200000 not 2.200000
not ok 132 - void ChannelAccessIFTest::test_channelArray(): data slot 2 should be 3.300000 not 3.300000
not ok 133 - void ChannelAccessIFTest::test_channelArray(): data slot 3 should be 4.400000 not 4.400000
not ok 134 - void ChannelAccessIFTest::test_channelArray(): data slot 4 should be 5.500000 not 5.500000
Failed 5/152 subtests 
	(less 12 skipped subtests: 135 okay)

Maybe a precision issue with comparing doubles? Will add a comparison tolerance and see