Lately I've been having problems trying to synch up two DMGs using a link cable.
I stick the cartridges in, power them on one by one, with the cable attached, load up the song on each, set the Master and Slave to the appropriate Gameboys, mute the channels on each I don't want to play... hit start on the Slave, Start on the Master, and... the Slave doesn't respond.
It works sporadically, but more often than not I've hit the same problem. Is there something daft I'm missing that's causing them not to synch?