This is a pretty imperfect solution, especially since some of the noise is embedded in the same frequency range as the voice you hear on the file, but here goes nothing. What I was talking about with regards to the frequency spectrum is that if you hear the sound, the background noise has a very … Read more
I stumbled on the answer (frankly, by trying &^@! I didn’t think would work), in case anybody’s interested… In my original code (which is derived from the example in the link in the original post), the data is read from the file like so: InputStream is = new FileInputStream (file); BufferedInputStream bis = new BufferedInputStream … Read more
Here’s a basic WAV concatenation function built using NAudio. This will ensure that only the data chunks are concatenated (unlike the code example in this CodeProject article linked in another answer). It will also protect you against concatenating WAV files that do not share the same format. public static void Concatenate(string outputFile, IEnumerable<string> sourceFiles) { … Read more
I’ve been wrestling with this exact same question for hours now, and my issue was mostly that when recording in 16 bits you have to be very careful about what you write to the output. The WAV file expects the data in Little Endian format, but using writeShort writes it to the output as Big … Read more
Below is a java class that will do this very thing. There are certain parameters that I’m hard coding here like width of image, height of image, background color of image, and some more stuff. If you want to pull those out, you could. import java.awt.BasicStroke; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.font.FontRenderContext; import … Read more
I figured out how to do what I described in my question and thought I should post it for the benefit of others. The code is below. I call playByteArray and pass it a byte array containing pcm wav data. window.onload = init; var context; // Audio context var buf; // Audio buffer function init() … Read more
I’m not sure why the second approach you linked to starts another thread; I believe the audio will be played in its own thread anyway. Is the problem that your application finishes before the clip has finished playing? import javax.sound.sampled.*; import java.io.File; import java.io.IOException; import javax.sound.sampled.LineEvent.Type; private static void playClip(File clipFile) throws IOException, UnsupportedAudioFileException, LineUnavailableException, … Read more
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 … Read more
This image is taken from a Stanford course So you can see that the audio data occurs immediately after the headers you already read and there will be Subchunk2Size bytes of audio data. The pseudocode for this would be ReadRIFF(); ReadFMT(); int32 chunk2Id = Read32(BigEndian); int32 chunk2Size = Read32(LittleEndian); for (int i = 0; i … Read more
You’ll need to use DirectX (DirectSound) or some similar API that is designed to allow the playing of multiple sounds at the same time.