Doepfer

Le Dimanche 13 Janvier 2002 21:14, vous avez écrit :

> The module will be a "multi-use" digital module:
>
some swiss army digital knife  ? ;) 

> * It will have 4 inputs and 4 outputs. (8 bit resolution on the a/d and d/a
> converters)
>
> * The brain will be a microcontroller, which is basically a little computer
> on a circuit board, programmed in 'C' or assembly.
>
> * The unit will have a 16 character LED and three or four buttons to select
> patches and change parameters.
>
> * It will NOT have non-volitile memory on board.

mmh a big drawback. at least analog gear can be switch off until the next day 
to continue a patch... So it won't be possible with your module ? 

> * Here's what it will do:
>
>   Clocked pattern generation
>   clock divider
>   all the basic logic (and/or/xor)
>   clocked/unclocked random gate generator
>   gate delay, etc ...
>
> And, if I'm lucky, it should also do:
>
>   LFOs (voltage controlled)
>   ADSRs
>   8-bit sample and hold
>   8-bit audio distortion (??)
>   Noise generator
>   Envelope follower
>   Logical comparison of 2 voltages
> ..and other low frequency cv stuff that won't suffer because of the 8 bit
> resolution.
>
> QUESTIONS!!! --
>
> 1.  Would it be horrible if the unit only output 0-5 volts on the 4 output
> lines?  I can do 0-12 volts if people wish.

I don't know but probably 0-12 volt is better specially if you produce some 
patterns ? Unless these patterns are not meant to be played by a VCO. 

> 2.  This unit may cost a lot to produce.  Is it worth it?  I'm guessing
> that the final product may cost around $400-$500 USD.

It is some money, a module can be costy no problem with that. All depends of 
the features. Will you include some slew circuit to round the 8 bits steps ?

> 3.  Anyone have any requests?  I'm trying to keep it simple so I can finish
> it.  Some patches may have more than one function.  For instance, since
> there are 4 outputs, there may be a patch with 4 different LFOs on the
> outputs at once.  Or, two LFOs and two ADSRs.

Will it be possible to have several lfo with different wave forms and 
frequencies on 1 output ?

Best regards,

Linium