the BMD docs list the channels as stereo pairs. 32 stereo=64 mono. same thing...and a very common confusion for MADI documentation on many shows that I do. You learn to do the cross reference in your head really quickly after a while tho-at least I did.
if that explaination doesn't work, try this list ...expressed as Stereo Channels - BMDs way
Ch1 - SDI Input 1 ch1/ch2
Ch2 - SDI Input 2 ch1/ch2
Ch3 - SDI Input 3 ch1/ch2
Ch4 - SDI Input 4 ch1/ch2
.
.
.
Ch29 - SDI Input 29 ch1/ch2
Ch30 - SDI Input 30 ch1/ch2
Ch31 - External Mic
Ch32 - Analog XLR ch1/ch2
or I could list it this way....expressed as Mono Channels - the way I usually work, and how most consoles represent MADI
Ch1 - SDI Input 1 ch1
Ch2 - SDI Input 1 ch2
Ch3 - SDI Input 2 ch1
Ch4 - SDI Input 2 ch2
Ch5 - SDI Input 3 ch1
Ch6 - SDI Input 3 ch2
.
.
.
Ch59 - SDI Input 30 ch1
Ch60 - SDI Input 30 ch2
Ch61 - External Mic
Ch62 - External Mic
Ch63 - Analog XLR In ch1
Ch64 - Analog XLR In ch2
both ways convey the exact same channels in the MADI signal. Both are correct and acceptable.
In 8k mode, there aren't enough sources to fill all 64 channels, so only 14 stereo slots (28 mono slots) are used.
It really bugs me that they assigned the output channels this way. If you are interested in 4channel sources (like EVERYTHING in my kind of shows) I would much rather see SDI 1-15 as 4 channel in MADI 1, then sources 16-30 in MADI 2. As it is, if I need all 4 channels from SDI 3 and 4, I need to used both MADI outputs-difficult when most smaller consoles will only have a single MADI input. I'd also like to see the audio from the Media Players present in the MADI too. Ideally I could just assign whatever I wanted to the MADI outs-THAT would be EXCELLENT!! My .02