MIDI2CV alternatives (was: Re: [sdiy] Newbie alert :-))

[marc bareille]

Hello

> nice, but only 8 bit DACs, given the non-linearity errors you get with 
> 8 bit
> DACs( 1 or 2 bits) you could have problems with pitch tracking over a 
> large
> range.
>
>  
>
"Only 8 bits DAC" for sure it is ... but  without any trouble on over 8 
octaves range  in 1V/Oct !!!   Really i love you 8 bits detractors but 
you should try first may be ...  You will be surprised to discover that 
if your synths an the MV interface are correctly trimmed 8 bit DACs are 
sufficient enough  for 1V/Oct scales. Considering the wide number of 
those interfaces i have builded ,installed in vintages synth, and the 
impressive number  of feedback emails of happy MCV628/876  builders  i 
told to myself that if it had a linearity problem , i should seen it as 
well as other ppl ..

I admit 8 bit is a bit short to finely emulate  V/Hz scale ... That is 
why  i am actually testing the 16 bit  mode with the same 8 bit hardware 
.... It will allow management of Pitch Bend too  and hi accuracy V/Hz  
obviously ... Note to implement  this mode on any MC just  one more 
extra resistor is required  on the MCV  pcb !!!  :)

I am actually writing page for a massive upgrade of the site ... So be 
preprared to see in coming days the MCV876 , now polyphonic 2 to  4 CV 
voices , with Midi clock integrated and many many other cool  features 
inside like velo triggers etc etc ... the MCV firmware is now V2.01...

Best Regards,

Marc B.



Paul Maddox wrote:

>Hi,
>
>  
>
>> MCV628, MCV876 also should be checked!
>>
>> http://m.bareille.free.fr/mcv628/mcv628.html
>> http://m.bareille.free.fr/mcv876/mcv876.html
>>    
>>
>
>nice, but only 8 bit DACs, given the non-linearity errors you get with 8 bit
>DACs( 1 or 2 bits) you could have problems with pitch tracking over a large
>range.
>
>Paul
>
>
>
>  
>