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Remove echo from audio recording
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IT & Programming > Mobile Applications

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The client has made the following changes to the job.


Bidding period extended.

Jun 26, 2012

Job Description

  |  Change History >>


  • Posted: Sat, Jun 02, 2012
  • Time Left: Closed
  • Location: Anywhere
  • Client prefers freelancers from:

    You are still able to submit a proposal for this job.

    The client prefers freelancers from
    a different location.

    You're still able to submit a proposal for this job, regardless of your location.
  • Start: Immediately
  • Budget: Not Sure
  • Fixed Price Job
  • Elance Escrow Protection
  • W9 Not Required
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We record a sequence of 36 tones in thousands of different combinations.

We have two tones

18,000 Hz
19,000 Hz

We want to remove all of the echo from the recording to make it easier to process the audio for pattern recognition.

Input is a WAV file

Output is a cleaner WAV (minimal echo)

Needs to work quickly

Alternatively can this be achieved when the iphone makes the recording in the first place?

We look forward to your proposals
Added 2 JUN 2012, 8:21 AM EDT
Our app can be used anywhere. So the level of echo will of course change based on location.
Added 2 JUN 2012, 8:25 AM EDT
all tones are in the following format

5 ms Ramp from Silence to Full Strength
15 ms Tone (18/19 KHz)
5 ms Ramp from Full Strength to Silence
5 ms Silence

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Job ID: 30953736
Avg $ | High $ | Low $ — Show Pricing
  • Submit Date (Latest)

 India  |  
I am a post-Graduate in Computer Science and Engineering, I'm in the field of iOS programming from the last 3 years and I feel that I have the...
 0.0   |  Private   |  0 Jobs
Bid ID: 30954491  |  Submitted: Jun 2, 2012 09:27 ET 
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