The Yamaha AN1x Synthesizer mailing list

--- 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