[sdiy] Choosing a DAC

[Dave Manley]

It looks like a 16-pin DIP socket.

It could be used to expansion or test purposes, or...googling...

See section 5-6 Digital Interface: 
http://www.pro-one-synth.org/manual.php?section=5

Anybody have a link to a pdf for the full Pro-One Service Manual?

-Dave

Mark Rivera wrote:
> (With the gif displayed as-is in the browser...)
>
> Halfway down the west side of:
> http://machines.hyperreal.org/manufacturers/Sequential/Pro-One/schematics/pro1-schematics-a.gif
> is the AD558.
>
> Just to the southwest of it is a rectangle that a dashed border and
> features like ---<4  11>---
>
> What is that part of the schematic depicting?
>
> Mark
>
>
> On Mon, Jul 6, 2009 at 11:39 PM, Olav Martin Kvern<okvern at ix.netcom.com> wrote:
>   
>> Hi Stewart,
>>
>> Do look at the way that Sequential Circuits set up the DAC in the Pro-One.
>> It's an Analog Devices AD558, an 8-bit DAC with an adjustable range. They
>> use it as a 6-bit DAC, and feed it note values from 0 to 63 for just over a
>> 5-octave range at 1 volt per octave. Glide is handled by a separate circuit.
>> It's really pretty brilliant (in my opinion).
>>
>> With all of the incredible devices that are available today, it's easy to
>> get hung up on DAC accuracy and resolution, but we can still learn a few
>> tricks from circuitry from 1980.
>>
>> Thanks,
>>
>> Ole
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>>
>>     
>
>
>
>