Re: Re: K5 distorted output from patches using Source-2

How much are they charging you for it? 

James

--- narfman96 <narfman96-/[email protected]> wrote:

> The balance only controls the volume for S1 and S2.
> If S1 is all the 
> way down S2 is cranked. Other than the DDA envelope
> (oh yeah the DHG 
> levels too) ahhh, where can S2 be turned down to
> sublight.
> 
> The aftertouch was easy. There's 2 pots on the
> backside of the MI-004 
> board they say Gain (VR1) and Offset (VR2) on them.
> Open Midi-Ox and 
> watch the pressure change the values for aftertouch
> from 00 to F7. 
> Adjust these pots to get the best performance for
> your preferences. 
> Offset is where it starts to kick in. Then the gain
> adjusts how 
> quickly F7 cranks in. I like a smooth contollable
> range that doesn't 
> rip my tendons out.... That's why I can tell the
> notes from G3 to D4 
> in this K5 aren't as responsive as the rest. 
> 
> Whoohoo!!! I'm talking to Kawai about the Service
> Manual. They are 
> soooo gooood in this day and age of crapping on us
> hardware guys. 
> Oops did I say e-mu? Awww darn! Dirty bird!! I want
> my money back!!!
> 
> Anyway the manual should be on its way....  Fran   
> 
> --- In [email protected], James Bong
> <jamesbong@...> wrote:
> >
> > How does it sound if you turn S1 all the way down,
> and
> > start turning up S2? Same distortion?
> > 
> > Oh, and where was the after-touch adjustment? I'm
> > always afraid I'm going to tip my stand over when
> I'm
> > using after touch modulation!
> > 
> > James
> > --- narfman96 <narfman96@...> wrote:
> > 
> > > Yes I do have a scope I just haven't gotten that
> far
> > > yet. Yesterday I 
> > > rebuilt the keyboard. This synth has a nice
> action
> > > when it's all 
> > > greased up and triggers every note. I found the
> > > aftertouch 
> > > adjustments and got it more sensitive than the
> key
> > > bending tipping 
> > > over the stand mode it was originally set for.
> The
> > > aftertouch strip 
> > > has a few spots that are less sensitive but hey
> it's
> > > a beast....
> > > 
> > > If it will help I can post the DAC's datasheet
> here
> > > in the files 
> > > section so you can see what weird output
> > > configurations it can have. 
> > > Either current or voltage outputs can be used.
> There
> > > isn't any pot 
> > > for the offset zero. Also it seems like Kawai
> > > doesn't use much of the 
> > > gain that's available. Maybe that's why it's so
> > > noisy.
> > > 
> > > The patches sound like they should if I turn the
> > > balance so S2 is off 
> > > (-31). Except of course they're thin and
> lifeless
> > > without the other 
> > > voice mixed in. I saved a bank that way so I
> could
> > > check out the 
> > > keyboard. I can see where some of the noise
> comes
> > > from. The high 
> > > frequency response goes way out there. Most of
> these
> > > 80's and 90's 
> > > synths have low pass filters. This thing sounds
> wide
> > > open on top end! 
> > > Probably so you can hear the 128 harmonics in
> all
> > > their glory.
> > > 
> > > Hopefully I won't be beat when I get home from
> work
> > > so I can play 
> > > around with this some more. Still haven't heard
> from
> > > Kawai yet about 
> > > the schematics. Also they always have me sign
> their
> > > non-disclosure 
> > > form so I'm leery about openly posting them in
> the
> > > group. Of course 
> > > helpful individuals are a different story.
> Right???
> > > 
> > > Fran
> > > 
> > > --- In [email protected], James Bong
> > > <jamesbong@> wrote:
> > > >
> > > > You wouldn't happen to have an oscilloscope to
> > > verify
> > > > that the output of this chip is actual
> problem, do
> > > > you? 
> > > > 
> > > > If you do get the schematics, could you
> possibly
> > > get
> > > > them scanned to share with the rest of us?
> > > > 
> > > > James
> > > > 
> > > > --- narfman96 <narfman96@> wrote:
> > > > 
> > > > > I resoldered everything involved in this
> part of
> > > the
> > > > > circuit. There 
> > > > > is a feedback resistor on the DAC for the
> audio
> > > > > output. This measures 
> > > > > 6.8k same as the working one. Maybe tonight
> I'll
> > > try
> > > > > lowering this 
> > > > > value to see if the gain decreases.
> > > > > 
> > > > > I'm not having much luck finding a PCM55HP
> DAC.
> > > > > Digikey lists it for 
> > > > > $38.50 with a long, long lead time... Crap!
> > > Anyone
> > > > > know of a source?
> > > > > 
> > > > > Hopefully Kawai gets back to me today about
> the
> > > > > schematic.
> > > > > 
> > > > > Thanks, Fran
> > > > > 
> > > > > --- In [email protected], James Bong
> > > > > <jamesbong@> wrote:
> > > > > >
> > > > > > Does this chip have a bias circuit to set
> the
> > > > > min/max
> > > > > > output voltage scale? It could be
> something as
> > > > > simple
> > > > > > as a cold solder joint finally loosing
> contact
> > > and
> > > > > > changing the bias. I'd check/re-solder the
> > > solder
> > > > > > joints to everything connected to the
> chip,
> > > and
> > > > > the
> > > > > > chip it's self.
> > > > > > 
> > > > > > James
> > > > > 
> > > > >
> > > >
> > > 
> > > 
> > >
> >
> 
> 
> 


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