wav

I can convert wav file to pcm ffmpeg -i file.wav -f s16le -acodec pcm_s16le file.pcm How can I revert this operation? The wav container just adds a simple header to the raw PCM data. The header includes the format, sample rate, and number of channels. Since the raw PCM data does not include this information, you will need to specify it on the command line. Options are specified before the file they apply to, so options before the input file may be used to specify the format of the input file, and options after the input file and before the output file may be used to specify the desired format

I am trying to save in a file the audio data listened by speech recognition service of android. Actually I implement RecognitionListener as explained here: Speech to Text on Android save the data into a buffer as illustrated here: Capturing audio sent to Google's speech recognition server and write the buffer to a Wav file, as in here. Android Record raw bytes into WAVE file for Http Streaming My problem is how to get appropriate audio settings to save in the wav file's headers. In fact when I play the wav file only hear strange noise, with this parameters, short nChannels=2;// audio channels

When I store the data in a .wav file into a byte array, what do these values mean? I've read that they are in two-byte representations, but what exactly is contained in these two-byte values? kratenko You will have heard, that audio signals are represented by some kind of wave. If you have ever seen this wave diagrams with a line going up and down -- that's basically what's inside those files. Take a look at this file picture from http://en.wikipedia.org/wiki/Sampling_rate You see your audio wave (the gray line). The current value of that wave is repeatedly measured and given as a number. That

I have this code which plays wav files from a folder with play and stop. How can I add pause and continue? import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.applet.AudioClip; import java.net.URL; public class JukeBox extends JFrame { private JComboBox musicCombo; private JButton stopButton, playButton; private AudioClip[] music; private AudioClip current; public JukeBox(String title) { super(title); getContentPane().add(new JukeBoxControls()); } public static void main(String [] args) { JukeBox myf = new JukeBox ("WAV COMBOBOX"); myf

The following code writes a simple sine at frequency 400Hz to a mono WAV file. How should this code be changed in order to produce a stereo WAV file. The second channel should be in a different frequency. import math import wave import struct freq = 440.0 data_size = 40000 fname = "WaveTest.wav" frate = 11025.0 # framerate as a float amp = 64000.0 # multiplier for amplitude sine_list_x = [] for x in range(data_size): sine_list_x.append(math.sin(2*math.pi*freq*(x/frate))) wav_file = wave.open(fname, "w") nchannels = 1 sampwidth = 2 framerate = int(frate) nframes = data_size comptype = "NONE"

Is the endianness of format params guaranteed in RIFF WAV files? I have heard conflicting answers to this including references to a RIFX file format. Yes. If the file starts with RIFF, then it's little endian. If it starts with FFIR or RIFX, then it's probably not. Generally, supporting the WAV format means supporting RIFF files, although adding RIFX support should not prove difficult. The AES31 specification for BWF (Broadcast Wave Format) references this specification for RIFF: http://www.tactilemedia.com/info/MCI_Control_Info.html From this: RIFF has a counterpart, RIFX, that is used to

First off this is for homework or... project. I'm having trouble understanding the idea behind how to draw the sound data waves on to a graph in Java for a project. I have to make this assignment entirely from scratch with a UI and everything so basically making a .wav file editor. The main issue I'm having is getting the sound data into the graph to be drawn. Currently I have a randomly generated array of values just being drawn right now. So far I have a mini-program running and validating the wav file for it to actually be a wav file. I'm reading it in with a FileInputStream and validating: