When someone is speaking into the mic, I'd like a "level meter" such as the one that comes with gnome sound recorder, that flashes up and down when a sound is made or somebody talks.This will be done in Javascript, using the brand new "Rainbow API", i.e. inside the browser.I know nothing about audio programming, so - where would I get *started* with something like this? Could anyone tell me at least WHAT to Google?
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Can someone recommend a good app to monitor the OUTPUT of my soundcard? I don't just want to look at the VU meter of my music player - i actually want to see what the soundcard is outputting. Windows drivers for my soundcard (Audiophile 192) had this ability, but I'm not sure what software to use in Linux.
View 6 Replies View RelatedI want to know what are the advantages and disadvantages for accessing spi(serial peripheral inerface )from kernel level and user level. like methods of doing it, speed ,memeory utilization etc
View 1 Replies View RelatedThere is this sample web page: [URL] and it has a clickable link / button that executes a JavaScript function: (Right-Click and Copy Shortcut would give this piece of code)
Code:
javascript:__doPostBack('lbtnUpdateStatus','')
whereas the source code for the link / button is as follows:
Code:
<a id="lbtnUpdateStatus" href="javascript:__doPostBack('lbtnUpdateStatus','')">
I want to automate the above function / link along with the said URL so that I won't have to open the webpage and click the button / link. I want a single URL hitting which we won't need to do the extra effort of "clicking the link / button" that executes the JavaScript function given above. I can't automate this task in the source webpage itself because that has to be there as it is for the users who access the webpage. How to achieve it?
I got some useful information here: [URL] but I want to call a javascript function along with a URL such as this:
Code:
[URL] javascript:alert("OKAY")
but the above line of code won't work.
Check out the frontpage of mail.com - how do I do the scrolling images in Javascript, like it's doing?
View 4 Replies View RelatedI went to [URL] the other day, and I'm really impressed with the way, when you click on domain, it adds it to the cart WITHOUT A REFRESH. But what I really want to know is - how does it do the slick little effect when you click "Add to basket", when it "appears" on the right hand side?
View 4 Replies View RelatedI have some variables that are loaded from mysql - in mysql, the line breaks are not indicated by ' or '<br>' or anything -they are just line breaks. the variable is loaded into javascript and then inserted into a <pre> element. the line breaks are not showing up.
pre1 = pre1.replace(/>/g,">"); - this works well, naturally. but how do i get those line breaks to show up as line breaks in a browser?
I've tried many variations of something like:
Lets say I have a site "Website1.com"
On that site I want to run a little javascript that verifies that the site was accessed as "Website1.com" and not "dev-Website1.com"
If it was accessed correctly, nothing happens. If it was accessed incorrectly, it displays an error saying "You are trying to access this site incorrectly."
What is the simplest way to accomplish this?
I am using window.onbeforeunload to keep people from accidentally leaving. I was hoping to intercept this event, run my own dialog box and load another page that closes the window, or of course, cancel.
I'm needing this because my site is a single page and I can't figure out how long people are visiting for, if I could load an exit page, then I can figure this out.
var param = function() { <whatever> } ;What exactly does the above MEAN, and why have they included this in the language this way?
View 6 Replies View RelatedIn my book, this is an example of a recursive algorithm:
var reverseArray = function(x,indx,str) {
return indx == 0 ? str : reverseArray(x,--indx,(str+= " " + x[indx])) ;; }
var arr = new Array('apple','orange','peach','lime');
var str = reverseArray(arr,arr.length,"");
alert(str) ;
I'm trying to understand it, I'm stuck at the (str+= " " + x[indx])) part - that part of the function definition expects an ARGUMENT, am I right? What's being passed to it is a bit of PROGRAM, the str+= stuff. So - how is it working?
I'm loading an XML file stored in a tiny web server (based on lwip). This web server is not very cooperative and is not marking the http content-type as "text/xml". As result, Firefox is not recognizing the file as xml (IE does) so I can't use DOM methods for parsing the xml file. overrideMimeType("text/xml") should help me avoid this problem but, even having overrided the mymetype, the content-type received is still "text/plain". This is a portion of my JavaScript code:
Code:
var xmlObj;
// loadXMLdata is called from the html file
function loadXMLdata() {
var dataFile = window.location.href.substring(0, window.location.href.lastIndexOf("/") + 1) + "config/myfile.xml";
if (window.XMLHttpRequest) {
xmlObj = new XMLHttpRequest();
// This should override the mimetype...
if (xmlObj.overrideMimeType)
xmlObj.overrideMimeType("text/xml");
xmlObj.onreadystatechange = fillXMLdata;
xmlObj.open("GET", dataFile, true);
xmlObj.send("");
} else {
alert("Your browser can not handle this script");
return; } }
// fillXMLdata is called from loadXMLdata once the xml object is ready
function fillXMLdata() {
if (xmlObj.readyState == 4) {
// Here Content-Type shows again "text/plain"
alert(xmlObj.getAllResponseHeaders());
var xmlDoc = xmlObj.responseXML.documentElement;
// And here section is null
var section = xmlDoc.getElementsByTagName("section")[0]; } }
The xml is quite simple:
Code:
<?xml version="1.0" encoding="iso-8859-1"?>
<section>
<item>1</item>
<item>2</item>
</section>
im trying to learn javascript. so i choose to start out making a image slideshow banner that auto scrolls on load no special buttons. so since i had no idea were to start i found code that was free to use commercial and non commercial and ill be able to change it. heres that code:
Code:
var SLIDETIMER = 3;
var SLIDESPEED = 3;
[code]....
I'm working with javascript and trying to replace all instances of a Roman character in a string with nothing. How do I assign var reg to all Roman characters? In UTF8, capital letter A is U0041 and at the other end, small z is UFF5A.
So, I'd like to do something like:
var reg = u0041 - UFF5A;
str1 = str.replace(reg, '');
I think you get the idea. I have no idea if that can be done. The idea is to take this string (for example): str = make a door-to-door[house-to-house] visit / ring every doorbell." And take out all the Roman characters and define it as str1. And then take out all the Korean characters (u1100-uFFDC) and define it as str2. In fact, a WAY more useful thing to do would be to replace the instance of this: [u1100-uFFDC]+" "+[u0041-UFF5A] with [u1100-uFFDC]+","+[u0041-UFF5A] so that the output would be a .csv file.
I can play a sound on my local machine using the following code, but when I upload to a server the same code it does not play. I cannot work out why, the link below gives the code. The multi channel code is here:
[URL]
Code:
<audio id="multiaudio1" src="audio/flute_c_long_01.wav" preload="auto"></audio>
<audio id="multiaudio2" src="audio/piano_chord.wav" preload="auto"></audio>
<audio id="multiaudio3" src="audio/synth_vox.wav" preload="auto"></audio>
<audio id="multiaudio4" src="audio/shimmer.wav" preload="auto"></audio>
[Code].....
I'm looking for javascript tutorials or books that meets the following criteria:
1. Very thorough: Starts with the most fundamental concepts and progresses logically from basic to advanced concepts, without skipping over important ideas for the sake of expediency.
2. Lots of small practice exercises that parallel the concepts and syntax being learned.
I've looked at a lot of tutorials, but they all tend to be lacking in one of these areas or the other.
How can I validate an IPv6 address through javascript before using the IPv6 value in my cgi script?
View 2 Replies View RelatedThis is a Lenovo L512 laptop with Intel HD Audio (Realtek ALC269 / Intel G45 DEVIBX) which was recently upgraded to Squeeze. I've been having trouble using the headphones on this machine, as the speakers continued to play while the headphones were connected. I normally use KDE, and the available mixer only offers one channel. I thought I might be able to manually silence the speakers by using the command line tool alsamixer. Unfortunately, alsamixer has a channel for the headphones, but it doesn't do anything, only master volume is controllable. By luck I decided to play around with Gnome today and to my great surprise, System -> Preferences -> Sound offers complete control over all functions of the audio hardware. Does anyone know how I could get these features working under KDE?
View 3 Replies View RelatedI am trying to set up a webpager that contains a background of the skylouds uperimposedin the center will be an image of an airplane with a transparent background.I want the sky to scroll continuously to the left behind the airplane. I am having problems with the background not being visible, not moving as expected, the airplane not being visible, and just disappointment in general.I think the background of a div will not be visible if there are no internal contents because it will be sized to zero. So I introduced another transparent image to force the size of the main div. Still no joy.Here is my code. Note that I don't have my timers set up yet, just a button to test background movement.
Code:
<!DOCTYPE html>
<html>
[code]...
Is there some way to access HTML elements via javascript through some internal ID?
For instance, given a form like:
Code:
<form name="myForm">
<input type="text" />
<input type="text" />
[Code]....
I think I've seen some way to do this before but I'm not certain
this should have been a simple task, but for some reason one of my rollovers plain old isn't workingmy html sheet
Code:
<div style="background:#F5F5E9 url('/sites/all/themes/flossmoore1/images/bricks250.png');padding:1px;padding-
[code]....
I am working on scraping a sit e but during the authentication process (a form and user/password then submit) a javascript pop-up window comes up that needs to be pressed.I was planning on using www:mechanize but found out it doesnt do javascript.
View 2 Replies View RelatedI am looking for a tool that will tell me, in less than half a second, if the microphone is picking up any sound above a certain threshold. (I plan to then mute the Master channel with another command line tool, like amixer.)
View 1 Replies View RelatedI am concerned about my tweeters in relation to signal coming from the computer. I have machine LINE OUT fed into my preamplifier (hardware audio component) all the time. The max levels of tuner, tape recorder, turntable, etcetera are all "equalized". That is, they all more or less deliver the same output level to the preamp. The difference between a CDDA level and that of another one is always minimal. The same goes for vinyls (not "so minimal"). As to radio broadcasts, one may be xmiting with great power and make differences larger, but still no harm for the tweeters, relatively speaking. Mine are 50w four-way loudspeaker systems (forgive the word, I used to call them baffles).
The power amplifier is 30w per channel so, theoretically, it cannot damage the speakers. But the preamp (Yamaha C-2) can deliver a very large signal. When this signal is unduly large, the woofer and mid-range speakers won't suffer. But the enormous resultant distortion can damage the tweeters. Some audio files have the signal recorded at very high levels. And I could launch aplayer, play or mplayer, or any GUI player, or I could receive an email audible notification when amixer's output controls are near the top and put my tweeters in danger. I think the core of the problem is the huge variation in level between different audio files.
In playback application i guess "snd_pcm_lib_write1" is the function call used to write the audio data to sound card at kernel level.If that is true. how can i send the same audio data at kernel level to other system connected over LAN.
View 1 Replies View RelatedI have this regular expression
Code:
(@description ").*(";)
I want to match anything in between the quotes its working fine in JavaScript but its not working in my python program:
Code:
#!/usr/bin/python
# -*- coding: iso-8859-1 -*-
import re
[code]....
I need a textbrowser with Javascript Support. I have compiled the elinks stable 0.11x and the unstable 0.12x version mit JavaScript Support (js moz dev). Both browsers can be started and showed websites normaly. But no javascript, even simple tests like [URL] failed. I started elink with ./elink and typed then the url.
View 4 Replies View RelatedAll I want to do is fade some text in and out via the opacity attribute, and change the text when it hits zero. My script changes the text on time, but ignores the formatting effects. I'm not worried at this stage about the else statement in the startFadeEffect() function. I just want the fade effect to work here the way it should.
[Code]...
I am new to Linux development and want to know within Linux which is the best IDE for system level programs in C like kernel modules/device drivers and other H/W level programs. I used to use Sun Studio Compiler in Opensolaris world.
View 1 Replies View RelatedI first created a fork on github from an existing git repo. Then I made changes to my fork and pushed them to github again. After that the person from who I forked included my changes in his code but made some alterations on it. What I want to do know is having the exact code he has in the repo. This way I am sure that I actually develop on the same code.
I wonder how I should do this. I tried using git mergetool but I had some conflicts. So if I resolve the conflicts and make some mistake here, then I still wouldn't have the code the original repo(the repo where I forked from) has. what is the correct way to do this?
