Doepfer

hello group


i realized that my maq 16 has a detuned cv output, while midi part is in 
perfect tune.
when i connect a synth with cv / gate and play a middle c on the maq
i tune the synth to c
now i play a higher c on the maq and its not in tune anymore (slightly 
lower then it should be)
when i play a lower note then the middle c it gets out of tune in the 
other direction (higher then it should be)
i tested it with 2 different synths with this result, and i also tested 
the synths itself with their own keyboards,
there it works just fine.
could this be a calibration problem of the maq16 ?

> hello group
>
>
> i realized that my maq 16 has a detuned cv output, while midi part is in
> perfect tune.
> when i connect a synth with cv / gate and play a middle c on the maq
> i tune the synth to c
> now i play a higher c on the maq and its not in tune anymore (slightly
> lower then it should be)
> when i play a lower note then the middle c it gets out of tune in the
> other direction (higher then it should be)
> i tested it with 2 different synths with this result, and i also tested
> the synths itself with their own keyboards,
> there it works just fine.
> could this be a calibration problem of the maq16 ?

The calibration of the CV outputs is described in the MAQ16/3 manual on page
31 (appendix E).

Best wishes
Dieter Doepfer

as the problem occurs with 2 different synthesizers in the same way, i 
really think that my maq is detuned.
but before i open it for calibration i will test it with my new a100 
system just to be sure its the maqs fault.
as i understand the manual there is no danger in doing this procedure ?
im somewhat affraid to open the device and fiddle with a screwdriver 
while its running ...



hardware@doepfer.de schrieb:
>> hello group
>>
>>
>> i realized that my maq 16 has a detuned cv output, while midi part is in
>> perfect tune.
>> when i connect a synth with cv / gate and play a middle c on the maq
>> i tune the synth to c
>> now i play a higher c on the maq and its not in tune anymore (slightly
>> lower then it should be)
>> when i play a lower note then the middle c it gets out of tune in the
>> other direction (higher then it should be)
>> i tested it with 2 different synths with this result, and i also tested
>> the synths itself with their own keyboards,
>> there it works just fine.
>> could this be a calibration problem of the maq16 ?
>>     
>
> The calibration of the CV outputs is described in the MAQ16/3 manual on page
> 31 (appendix E).
>
> Best wishes
> Dieter Doepfer
>
>
>
>  
> Yahoo! Groups Links
>
>
>
>
>   



[Non-text portions of this message have been removed]

i just fixed the problem by calibrating the maq, this is a very nice 
procedure.
i couldnt get the 36 (lowest setting of the knob) to G#3, it was just 
not possible to reach
by the trim pot of the maq and the tune fader of the synth.
so i set 36 to A#2.




Floppy schrieb:
>
> as the problem occurs with 2 different synthesizers in the same way, i
> really think that my maq is detuned.
> but before i open it for calibration i will test it with my new a100
> system just to be sure its the maqs fault.
> as i understand the manual there is no danger in doing this procedure ?
> im somewhat affraid to open the device and fiddle with a screwdriver
> while its running ...
>
> hardware@doepfer.de <mailto:hardware%40doepfer.de> schrieb:
> >> hello group
> >>
> >>
> >> i realized that my maq 16 has a detuned cv output, while midi part 
> is in
> >> perfect tune.
> >> when i connect a synth with cv / gate and play a middle c on the maq
> >> i tune the synth to c
> >> now i play a higher c on the maq and its not in tune anymore (slightly
> >> lower then it should be)
> >> when i play a lower note then the middle c it gets out of tune in the
> >> other direction (higher then it should be)
> >> i tested it with 2 different synths with this result, and i also tested
> >> the synths itself with their own keyboards,
> >> there it works just fine.
> >> could this be a calibration problem of the maq16 ?
> >>
> >
> > The calibration of the CV outputs is described in the MAQ16/3 manual 
> on page
> > 31 (appendix E).
> >
> > Best wishes
> > Dieter Doepfer
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>
> 
>
> __________ NOD32 2868 (20080212) Information __________
>
> Diese E-Mail wurde vom NOD32 antivirus system geprüft
> http://www.nod32.com



[Non-text portions of this message have been removed]

> i just fixed the problem by calibrating the maq, this is a very nice
> procedure.
> i couldnt get the 36 (lowest setting of the knob) to G#3, it was just
> not possible to reach
> by the trim pot of the maq and the tune fader of the synth.
> so i set 36 to A#2.

That's because of the DC offset of the CV outputs (see page 7 of the user's
manual). The MAQ16/3 has been developed more than 10 years ago and it was a
problem to find an affordable triple DA converter at this time. For new
designs such DC offsets are avoided.

Best wishes
Dieter Doepfer