Simple Audio Processing Utility
Posted Date Unknown 4 Comments

This article explains how to record audio from microphone and process the audio sample using DSP algorithms to produce altered audio output. In this article, I am using QAudioInput and QAudioOutput classes to record and play back to the input audio, and used Low pass filter algorithm to reduce noise in input audio. Here, I have tried to explain the low level audio processing using Qt. Here I am not explaining any complex DSP algorithms. It’s just a starting point to a better cross platform audio processing utility. You can implement your own algorithms or any complex algorithms to extend your ideas. I used Qt's audioinput and audio output examples to develop this utility.


See All Responses Below...
Author
Message Rating
Posted on: 08/09/2016
This article explains how to record audio from microphone and process the audio sample using DSP algorithms. The altered audio can save or output to a speaker. here I written to the output device(speaker).

After click on play button speak through the microphone of your system.  you can hear your sounds from speaker.
Check your systems default audio devices. I used default audio devices for record and play  sound samples  
TJ
Posted on: 08/09/2016
Thanks Arun, yes it works now, what a nice code you wrote. 
Is it possible to stream audio from mic on one computer to another computer in the same network? do you have any sample code written in QT for that?

Share this page across other social networking sites



Posted on: 08/09/2016
Please check this link
http://www.developer.nokia.com/Community/Wiki/Streaming_Audio_with_Qt
TJ
Posted on: 08/09/2016
Hi Arun,
Thanks for the code and information.
I am truing to run your code, and what I get is just the window that you have a plot of it in this document. When I press "play" nothing happens, can you please explain how the program works? What does it play? 
Thanks.
Share this page across other social networking sites



Please Login to Post Your Comments
Name (Max. 100 characters)
Please post your comments here
Select Language
Comments
   Design  HTML
Attach File(Max. Size: 2 MB)
A few simple rules when posting your Comments,
  1. Please post only answers relevant to the topic of discussion.
  2. Please dont misuse this site or do not be abusive, offensive, inappropriate,harass anyone on the boards or post ads or spam. Doing so will delete your inappropriate messages and will block or delete your account on this site. 

TekTipsDownload
GateExam
Academic Projects
TekTipsExperts



 
Site optimized for IE7, 1280 X 768 and above. Copyright © 2010 - 2018 KTS InfoTech
Site Developed Using KTS WebCloud