On Sun, Sep 27, 2009 at 9:22 PM, cheater cheater <cheater00 at gmail.com> wrote: > It might be that the signal isn't 'strong' enough, e.g. too long rise > times. (same reason as why you can only chain so many midi devices > with midi thru) > Oh, really? I though post-opto buffer cleans it up. Samppa