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Questions tagged [waveform]

Waveform means the shape and form of a signal such as a wave moving in a physical medium or an abstract representation

Waveform means the shape and form of a signal such as a wave moving in a physical medium or an abstract representation.In many cases the medium in which the wave is being propagated does not permit a direct visual image of the form. In these cases, the term 'waveform' refers to the shape of a graph of the varying quantity against time or distance.

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Drawing waveform with AVAssetReader

I reading song from iPod library using assetUrl (in code it named audioUrl) I can play it many ways, I can cut it, I can make some precessing with this but... I really don't understand what I gonna do with this CMSampleBufferRef to get data for…
iFreeman
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Measuring Human-Flatulence Propagating Wave Packet on the iPhone

Using my iPhone, I would like to measure human flatulence in order to measure, quantify, and provide a statistical report based on various properties of the overall event quality. Outrageous, maybe. Fun, definitely. If I'm going to "release" an…
George Johnston
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Show waveform of audio

I am making one music application in android.In this music list coming from server side. I don'tknow how to show waveform of audio in android ? like in soundcloud website. I have attached image below.
Alpha
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How to implement low pass filter using java

I am trying to implement a low pass filter in Java. My requirement is very simple,I have to eliminate signals beyond a particular frequency (Single dimension). Looks like Butterworth filter would suit my need. Now the important thing is that CPU…
chai
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Generating waveform from any music file ios

I'm looking for how to draw the sound waves according to music. I want waves like this image here is some discussion about displaying Waves from music WaveForm on IOS rendering a waveform on an iphone audio waveform visualisation with…
Vishal Khatri
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How to draw waveform of Android's music player?

one of the default live wallpapers that came with my phone was a wallpaper that displayed the wave form of music playing in the background in real time. I was wondering how one could go about doing this. It seems I should somehow access the…
INeedHelpWithWaveforms
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How do I generate a sine wave using Python?

I'm trying to generate a sine wave of a given frequency for a given duration and then write it into a .wav file. I'm using numpy's sin function and scipy's wavfile function. I'm getting a weird sound that is definitely not a sine wave. import numpy…
Badrinarayan Rammohan
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Efficient method to draw a line with millions of points

I'm writing an audio waveform editor in Cocoa with a wide range of zoom options. At its widest, it shows a waveform for an entire song (~10 million samples in view). At its narrowest, it shows a pixel accurate representation of the sound wave (~1…
tassock
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Generating a audio waveform graphic within Python

Is it possible? I'd like run over a batch of audio files and produce graphic waveform files from them. Similar to what SoundCloud displays, but perhaps the module(s) im seeking will offer a few more options. Whats out there? whats good?
Ben Keating
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rendering a waveform on an iphone

I was wondering if anyone has any suggestions on how to go about rendering a waveform of an audio file. I wold like to enable the user to set an in and out point of an audio track and I need to have a waveform so you can see where to put the…
dizy
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How to make waveform rendering more interesting?

I wrote a waveform renderer that takes an audio file and creates something like this: The logic is pretty simple. I calculate the number of audio samples required for each pixel, read those samples, average them and draw a column of pixels…
Jawap
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android audio distortion on square waveform

I found that my smartphone (android 4.2.2) is not able to generate square waveforms (i need it to use the audio output as serial line for data transfer). At beginning i supposed it was my application, but then i made many significant tests. These…
Gaucho
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How can I load only waveform and wait to user click 'play' to download the audio on Wavesurfer-js?

On my server I use Audiowaveform to generate JSON data from my audio files. On frontend I use Wavesurfer-JS to draw the waveform based on previous JSON data. The problem is that on page ready the Wavesurfer-JS download on background the audio file…
user6171080
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SoundCloud like waveform-seekbar?

Here is an image of the sound cloud's seek bar: Sound cloud actually calculates the waveform before the song plays and adds it as the background for the seek bar. I have tried to add some visualization based on android-visualizer. But what I need…
amalBit
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How to write C++ audio processing applications?

I'm an Electronics and Telecommunications student, next to my graduation. I'm gonna work on a project that involves my knowledge about DSP, music and audio in general. I allready know all the basic mathematic instruments and all the stuff I need to…
Cesko82
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