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digital low pass filter circuit design/realization
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Engineering & Manufacturing > Electrical

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Description
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Sep 1, 2011
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Job Description

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  • Posted: Sun, Aug 14, 2011
  • Time Left: Closed
  • Location: Anywhere
  • Client prefers freelancers from:
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  • Start: Immediately
  • Budget: $500 - $1,000
  • Fixed Price Job
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  • U.S. freelancers must have W9
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entrepreneur looking for at least a pro audio circuit and potentially a circuit designer to work with longer term if said circuit is successful.

design a pro audio circuit with two low pass filters of differing cut-off frequency ranges (specifically, one filter's cut-off must not be able to pass 1 kHz 10% and the other must not pass 3 kHz 10 %, but both should be able to reach down into the low hundreds of Hz) in parallel. very much like a wah pedal circuit e.g. those discussed at a geofex dot com article describing "The Technology of Wah Pedals" but digital. must be able to take line level (i.e. instrument) input, be able to output the same and be powered via 9V battery or AC adapter without interfering with other audio effects in proper series. must have user-adjustable cut-off frequency (in the case of analog versions that's usually made possible by an adjustable potentiometer.)

most important metric: must be able to roughly match template spectrogram provided here as at...

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Job ID: 25677794
 
Proposals
Avg $ | High $ | Low $ — Show Pricing
  • Submit Date (Latest)

 United States  |  
Winner
Electrical engineer with over 20+ years of embedded, FPGA and software experience and I'm a techno marketing guy. I'm an expert at building...
1
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 0.0   |  $0 Earnings   |  0 Jobs
Bid ID: 25809829  |  Submitted: Aug 23, 2011 13:35 ET 
Delivery
Within 2 months
$1,369.86

 United States  |  
I am an electronics engineer with 30 years experience in industry and academia. My degrees are from Rose-Hulman Institute of Technology (BSEE) and...
2
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 0.0   |  $0 Earnings   |  0 Jobs
Bid ID: 25790428  |  Submitted: Aug 22, 2011 11:33 ET 
Proposal SEALED

 Ecuador
Automatic and Computer Engineer graduated with Honors and with background yerar in software, hardware and network development
1
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 0.0   |  $0 Earnings   |  0 Jobs
Bid ID: 25746126  |  Submitted: Aug 18, 2011 19:30 ET 
Proposal SEALED

 Pakistan
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Bid ID: 25684773  |  Submitted: Aug 15, 2011 10:09 ET 
Proposal SEALED

 United States  |  
INVITED
Hardware design engineer with advanced degree and over 10 years experience in digital and RF board design. Digital boards have primarily been...
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 4.0   |  $300 Earnings   |  1 Jobs
Bid ID: 25679513  |  Submitted: Aug 15, 2011 00:40 ET 
Proposal SEALED

 Turkey  |  
EXPERIENCE: Analog design and smps experience: And also 4 year experince about smps, battery charger, analog design. I have designed li-ion...
1
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 0.0   |  $0 Earnings   |  0 Jobs
Bid ID: 25678436  |  Submitted: Aug 14, 2011 22:17 ET 
Proposal SEALED
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