--- In
AN1x-list@yahoogroups.com, "epigraphs" <epigraphs@...> wrote:
>
> 1. Turn OFF the power.
> 2. Press and hold the [0], [-] and [+] buttons down simultaneously
> while turning ON the power.
>
> But what are the changes between 1.01, 1.02 and 1.04???
1.04 OS corrects an erroneous 'low voltage' warning which can occur prematurely and also
corrects the audio response when modulating the depth, i.e., return, of delay effects. There
were no new features introduced with 1.04. There has been discussion on the list that
Yamaha is no longer distributing the OS update EPROM, but you could always call/email
Yamaha Customer support to verify.
Jon