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 Forum index » DIY Hardware and Software
Expert Sleepers DIY way
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MapacheRaper



Joined: Feb 15, 2018
Posts: 40
Location: Spain

PostPosted: Sun Aug 12, 2018 1:28 am    Post subject: Expert Sleepers DIY way Reply with quote  Mark this post and the followings unread

I have one 4 IN 4 OUT soundcard that I would like to turn it into an experts sleepers sort of module to interface the computer with the modular

Im guessing that I would need 2 TL074s to buffer the ins and outs. 100k impedances in the ins, 1K in the outs and trimming the opamps for +-10v ranges in the outs and +-1V in the ins. I´d be using only the +ins of the opams, the inverters should go to ground.

Is that correct?

Could I use just voltage dividers for the ins and just buffer the outs?. If you have tips or suggestions about building something like this it would be very appreciated. Im quite a newbie and I dont want to magicsmoke the soundcard.

The soundcard is a MAYA 44, but I guess all then works in more or less the same fashion/voltages, probably around 1 to 3v maximum (targeting 1v for security)
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AlanP



Joined: Mar 11, 2014
Posts: 499
Location: New Zealand
Audio files: 31

PostPosted: Sun Aug 12, 2018 2:31 am    Post subject: Reply with quote  Mark this post and the followings unread

There's a good chance that the soundcard may be AC coupled, and get grumpy about DC control voltages.
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g.gabba



Joined: Nov 29, 2008
Posts: 365
Location: berlin
Audio files: 23

PostPosted: Sun Aug 12, 2018 8:05 am    Post subject: Reply with quote  Mark this post and the followings unread

outputwise there is a guy on MW who did it with a cheap usb soundcard
https://www.muffwiggler.com/forum/topic-162610.html
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MapacheRaper



Joined: Feb 15, 2018
Posts: 40
Location: Spain

PostPosted: Sun Aug 12, 2018 4:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

Everytime that I have a fantastic idea it happens that Im missing some little funky key detail. I didn´t thought in th DC coupling at all.

The diamond soundcard experiemtn is exactly the same idea. It seems you have saved me a ton of time again.

Thank you guys, you are so supportive Wink
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