[sdiy] Envelope recorder (was Re: SSM2164 base for Doepfer sdiy synth kit.)

[Ullrich Peter]

Hi!

If 8 Bit are enough then a simple circuit can be built with the AD7669 ADC/DAC - even if you don't want to use a microcontroller.
There is a simple appnote that shows how to control this part with a counter and a RAM. See page 18 of the datasheet.
Some changes and it could be used as an envelope recorder/player.

http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad7669/products/product.html

Ciao
Peter

________________________________________
Von: synth-diy-bounces at dropmix.xs4all.nl [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von cheater cheater [cheater00 at gmail.com]
Gesendet: Sonntag, 15. August 2010 22:42
An: Tom Wiltshire
Cc: sdiy DIY
Betreff: Re: [sdiy] Envelope recorder (was Re: SSM2164 base for Doepfer sdiy synth kit.)

On Sun, Aug 15, 2010 at 12:33, Tom Wiltshire <tom at electricdruid.net> wrote:
> Nice idea, Michael.
>
> I've been wondering about joysticks too. I wanted to build a kind of "envelope recorder" with a slider control. The idea was that instead of a normal envelope, you'd press a 'record' button and then record the position of the slider over the next several seconds. You then be able to trigger the recording and play it back as an envelope curve. Perhaps you could speed it up too. Then I realised that you could use a joystick for the recording and do two dimensions at once.

You mean a sampler? ;-)

> I'll probably get around to it one year soon.

I wonder which hardware samplers are DC coupled end to end.

Cheers,
D.

> On 15 Aug 2010, at 10:03, Michael Zacherl. wrote:
>
>> That's my initial motivation to get into micro controller programming (see other thread).
>> We will play on a festival in October this year with a focus on a extensive multi channel speaker system.
>> ("play the room")
>> However, performing with hands and feet and controlling the balance of at least four channels at the
>> same moment is a bit tough in our musical context.
>> So I thought of a couple of VCAs (not sure about 2164) which are controlled by a µC which reads a joystick,
>> provides "scenes" (stored settings) fades between them etc.
>> But I'm afraid I won't manage to build that within the next five weeks, so I'll need a different approach.
>>
>>   Michael.
>> --
>> nonconform? noiseconform: http://blauwurf.at
>> ** in the process of switching provider - might/will be offline for a while shortly **
>
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