I've just connected my BeoCreate board to a single speaker for the first time, and I am not getting sound out of the system, but I think I should.
A speaker is connected to Ch1. The speaker is known to be working and emits a very faint hiss, so I think the connection is ok.
The hifiberry-dac overlay is loaded:
Alsa shows the expected device:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0 
Subdevice #0: subdevice #0
The DSP gateway is running:
$ ps xa | grep beocreate
547 ? Ssl 0:00 /usr/local/bin/beocreate-tcp
SigmaStudio is running 2-way-eq.dspproj and shows "Active: Downloaded"
I've removed the Mute jumper:
I can't think of anything else - what should I try next?