How to process audio in real time?

Posted by user1756648 on Stack Overflow See other posts from Stack Overflow or by user1756648
Published on 2013-06-26T15:13:15Z Indexed on 2013/06/26 16:21 UTC
Read the original article Hit count: 213

Filed under:

audio

|

signal-processing

I am giving some audio input through microphone. I recorded it in Audacity, it looks something like as shown below.

enter image description here

I want to process this audio in real time. I mainly want to do this.

1) see real time audio amplitude vs time graph

2) perform some actions based on some thing (like if a specific type of hike is seen in audio, then do something, else do something else)

Is there any python module or C library that can allow me to do this ?

© Stack Overflow or respective owner

Related posts about audio

How to create a virtual audio device and stream audio input with it

as seen on Super User - Search for 'Super User'
Is it possible to create another audio device and redirect only wanted input streams to it? Here's my concrete problem: I am broadcasting a game via XFire and it uses the Windows audio device to capture any audio I receive. As I am broadcasting, other users who watch the video stream are communicating… >>> More
PhP/HTML play button [migrated]

as seen on Pro Webmasters - Search for 'Pro Webmasters'
I'm wanting to make my own small webpage, I've got a domain Saoo.eu As you see there is a small play button in the corner witch plays a playlist. Is there anyway to have that playbutton on each page I'd add in the future without resetting every time the page changes? Am I forced to use iFrames for… >>> More
How to fix these compiler errors?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have this source code from 2001 that I would like to compile. It gives this: $ make g++ -O99 -Wall -DLINUX -pedantic -c -o audio.o audio.cpp In file included from audio.cpp:7: audio.h:14: error: use of enum ‘mad_flow’ without previous declaration audio.h:15: error: use of enum ‘mad_flow’ without… >>> More
Play an audio file using RemoteIO and Audio Unit

as seen on Stack Overflow - Search for 'Stack Overflow'
I am looking at Apple's 'aurioTouch' example for the iPhone and I would like to play an mp3 or wav instead of using the built in mic. I am very new to the audio portion of iPhone programming, but I think I need to modify the SetupRemoteIO(...) function and replace the AudioComponent named 'comp' with… >>> More
Create Audio file on iPhone/iPad from many other audio files (mixer)

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to create something similar like Piano app on the iPhone. When people tap a key, it play a piano note. Basically, there will have only 7 notes (C) at the moment. Each note is a .caf file and its length is 5 seconds. I do not know if there is any way to save the song user played and export… >>> More

Related posts about signal-processing

signal processing for a web programmer

as seen on Stack Overflow - Search for 'Stack Overflow'
What books would you recommend to a CS undergraduate that did mostly web programming all his life, in order to pick up signal processing ? I am looking for something at a grad level and more geared toward an average (or below average) programmer. >>> More
signal processing libraries

as seen on Programmers - Search for 'Programmers'
Are there any open source libraries/projects which work in a similar way to http://www.tagattitude.fr/en/products/technology? I am trying to understand the process. At first I thought this could work like when you send a fax to a fax machine. It is basically using the mobile phone’s microphone as… >>> More
Mean filter in MATLAB without loops or signal processing toolbox

as seen on Stack Overflow - Search for 'Stack Overflow'
I need to implement a mean filter on a data set, but I don't have access to the signal processing toolbox. Is there a way to do this without using a for loop? Here's the code I've got working: x=0:.1:10*pi; noise=0.5*(rand(1,length(x))-0.5); y=sin(x)+noise; %generate noisy signal a=10;… >>> More
Signal processing or algorithmic programming for a PLC

as seen on Stack Overflow - Search for 'Stack Overflow'
I have an application that takes voltages and temperatures as analog inputs and does some processing using an algorithm which involves signal processing such as low-pass filtering, exponential smoothing, and other steps which might typically be done in a high-level programming language such as C… >>> More
Learn mp3 format and audio signal processing

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to learn the following things: How mp3 file looks like internally? I found this: http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html but it seems old. Is there any recent changes to the format? I couldnt find any. How to open a mp3 file in java and look for bytes? I tried using audiostream… >>> More