[noob] track send -> bus is not sending any audio
I have a stereo track and a stereo bus. On the stereo track, I put a post-fader send and configured track out 1 -> bus in 1, and track out 2 -> bus in 2. When I play the audio, the bus meter is always silent while the track lights up like xmas.
send 1 window shows:
out 1 ardour:Bus 1/in 1 out 2 ardour:Bus 1/in 2
In Bus 1's input window, I see:
in 1 ardour:send 1/out 1 in 2 ardour:send 1/out 2
The configuration really looked rather obvious, so... what else do I have to do? Ardour manual covers tracks but zero about buses.
(Well, I'm a noob to ardour but not DAWs in general.)