GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. This library was original written as part of PitchLab in ; a continuation of research into human pitch perceptionwritten by ME!
The project migrated an application written in the early s to cross platform and modern Java. Unfortunately because this research is on-going I am unable to release the entire source of the project. However this library is fine. Also please note these files have not been used or modified prior to this release other than a few more commentsso some of the methods are purely experimental and possibly broken.
This is likely due to lack of buffer depth which would delay the response time when changing the tone on the fly. This responsiveness is crucial to the research. Just like any other library, this may be included and used in your Java program.
Both programs have main methods which can also be executed from the command-line to test its operation. The command-line interfaces are barren, but useful. The discrete wave generator has methods to generate any number of tones at random duration and frequency. It can also generate any specified tone specified in Hz for any discrete duration. The command-line testing interface is a little funky for this.
You will be prompted to Enter a random number of tones: the number of tones selected will be played after selecting the next number of tones to play. I don't know why this is. Additionally typing -3 will bring up a failed experiment tone blendingand typing 0 will bring up a new interface.
The new interface will ask you for a tone and a duration of time to play that tone. This will generate a pure sine wave for a particular frequency until told to stop. The frequency can be changed on the fly. The command-line testing interface is very straight forward. Simply type in the frequency you want to hear and it will play Until you type the next frequency you wish to hear.
To compile and run the program navigate to the directory above sinewave in a terminal and type:. Please enjoy this library! It's a great learning experience to play with it. You can find the full license here. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Creating a sine wave at a specific frequency and sample rate
Sign up. A discrete and continuous sine wave audio generation library for Java. Java Branch: master. Find file. Sign in Sign up.I'm Nataraja Gootooru, programmer by profession and passionate about technologies.
All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment. Everything in java is an object, except primitives.
Primitives are int, short, long, boolean, etc.
Since they are not objects, they cannot return as objects, and collection of objects. To support this, java provides wrapper classes to move primitives to objects. Some of the wrapper classes are Integer, Long, Boolean, etc. About Author I'm Nataraja Gootooru, programmer by profession and passionate about technologies. Java Data Structures Java 8 new features Write a program to find common integers between two sorted arrays. Publish Your Article Here. Program: How to calculate trigonometric sine of an angle in java?
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Sound Synthesis in Java
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How to get square root of a number in java? How to convert an angle from radians to degrees? How to convert an angle from degrees to radians? How to calculate trigonometric sine of an angle in java? How to calculate trigonometric cosine of an angle in java? How to calculate trigonometric tangent of an angle in java?
All Rights Reserved.The Java environment allows the programmer to take advantage of Java libraries for sound and to benefit from object-oriented programming features like encapsulation, inheritance, and interfaces. In this chapter, we are going to use the package javax. Program 2. This is the object to which we write audio data. Before doing that, we must set up the data line object with a specified audio format object.
See line The AudioFormat class specifies a certain arrangement of data in the sound stream, including the sampling rate, sample size in bits, and number of channels. A SourceDataLine object is created with the specified format, which in the example is 44, samples per second, eight bits per sample, and one channel for mono.
With this setting, the line gets the required system resource and becomes operational. After the SourceDataLine is opened, data is written to the mixer using a buffer that contains data generated by a sine function.
The mixer mixes the samples and finally delivers the samples to an audio output device on a sound card. This program illustrates a simple of way of generating a sound by using a sine wave and the javax. The second parameter, volumeis used to change the amplitude of the sound. Although the purpose of this section of the book is not to demonstrate how Java graphics classes are used, it may be helpful to use some basic plot features in Java to generate sine wave drawings.
An advantage of Java is that it facilitates your control of windows and containers. We inherit this functionality from the JPanel class, which is a container where we are going to paint the sine wave generated. It produces a Java Window by using the procedure paintComponent. This sine wave generated again has a frequency of Hz and a volume of If we increase the value of the frequency in line 18 to Hz, we can notice how the number of cycles increases, as shown in Figure 2.
On the other hand, by increasing the volume, we obtain a higher amplitude for each frequency. Figure 2. For example, to create a square wave, we may change the for loop to something like the following:. This for loop produces the sine wave shown in Figure 2. This graph doesn't look like a perfect square wave, but the more harmonic frequencies we add, the closer we get to a square wave. Note that you can create these waveforms more exactly by adapting the Octave programs above to Java.
Remember Me. AudioFormat; import javax. AudioSystem; import javax. SourceDataLine; import javax. LineUnavailableException; import java. Double border, h-sinesw-border, h-sines ; g2. Facebook Facebook. Log In. Explore Modules.The Simple Signal Generator is a C class designed to generate four simple periodic waveforms including sinesquaretriangleand sawtooth.
The class is provided for testing software and hardware components during the development of measurement applications. It is possible to set an arbitrary amplitude, frequency, DC-offset, and phase shift, and to invert the signal.
There are a couple of articles on The Code Project that describe in detail about developing different user defined components for dynamically changing single values or signal shapes such as bars, graphs, charts, gauges, and a diversity of other instruments.
These functions are typically periodical, mostly sine, and their variable x will be modified in a loop with constant steps across an interval [x0,xn]. Hardware developers use a totally different technique. For analyzing and troubleshooting electronic systems, they use an additional external device called signal or function or waveform generator. The signal generator is an important piece of electronic test equipment, and should not be missed in any electronics laboratory.
Typically, there are four basic signal types. After customization, the desired output signal can be wired on to the input of the component that should be tested, and we monitor their response function in the time domain using an oscilloscope. Displayed here is a typical low-cost signal generator that has on its front panel, a radio-button with four positions to choose signal types and three potentiometers to adjust frequency, amplitude, and DC-offset.
It is no big problem for hardware dudes to make something such as this, especially with tips from the book . Of course, there are much better and more expensive devices on the market with more functions, more parameters to choose, better range and a finer scale for these parameters, integrated display to show selected settings, user-defined functions, on-board memory, better stability, and two or more independent channels.
Note that, there are two very significant differences between the hardware and the software approach. Hardware developers use an external device, and a test signal is in the time domain, which implies that the test signal varies totally independent from the assembly that will be tested. The class presented offers a software equivalent for the above described real, simple signal generator device.
The parameter t is the real time here. The Parameter x is explicitly given as a time here. This should be used publicly only for DEBUG purposes, eventually during tests by adding new signal types! In this case, a value 1 corresponds to a full cycle. The basis for this is an easier deal with normalized values, for example, for scaling operations by fitting in a window.
Java Graphics How to - Draw sine curve
The signal generator is given as a class, but it is quite easy to transform it to a non-visual, or yet to a visual component, or maybe to a form like a front panel. For generating all the given signals, very simple functions are used, but they are not the simplest.
Some functions can be made simpler, but a development goal of this project was to generate signals exactly like the following example on Wikipedia:. The first example uses a compiled Simple Performance Charta component from eclipse2k1. It is a piece of homework to select one of four different signal types.Given an unsorted array of integers, sort the array into a wave like array. A Simple Solution is to use sorting.
First sort the input array, then swap all adjacent elements. This can be done in O n time by doing a single traversal of given array. The idea is based on the fact that if we make sure that all even positioned at index 0, 2, 4. Following are simple steps. This article is contributed by Shivam. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
Writing code in comment? Please use ide. Python function to sort the array arr[ Swap adjacent elements. Sort arr. Traverse all even elements. If current even element is smaller than previous. If current even element is smaller than next. Recommended Posts: Check if an array is Wave Array Program to sort an array of strings using Selection Sort Bucket Sort To Sort an Array with Negative Numbers Sort an array where a subarray of a sorted array is in reverse order Sort an array according to the order defined by another array Possible to form a triangle from array values Print all triplets in sorted array that form AP Rearrange an array in maximum minimum form Set 1 Comparison among Bubble Sort, Selection Sort and Insertion Sort Convert an array to reduced form Set 1 Simple and Hashing Maximum adjacent difference in an array in its sorted form Convert an array to reduced form Set 2 Using vector of pairs Find if an array of strings can be chained to form a circle Set 1 Ways to form an array having integers in given range such that total sum is divisible by 2 Rearrange an array in maximum minimum form Set 2 O 1 extra space.
Load Comments.I am working on a function that will generate a sine wave at a given frequency AND sampling rate. Something that will "fill a 10k sample buffer with a 1 kHz wave at a My attempts so far are producing a "tone", but the tone changes in unexpected ways as I vary the inputs, and any reference along the lines of what I am trying to do might help. I imagine that such a reference or a forum discussion might be "out there" somewhere. Appreciate any pointers I'm not aware of any simple reference for your specific question, but here's a quick line of thought for you:.
You need to scale your sine function such that 1, sine wave cycles would fit into 44, samples. Here's a rough look at how you'd derive code to fill the buffer:. A graphing calculator will help you visualize what's going on in each step, and writing out the dimensional analysis can't hurt, either.
I did search for this, but didn't find exactly what I am looking for. I'm not aware of any simple reference for your specific question, but here's a quick line of thought for you: A sample rate of Getting Started: Have something to contribute to this discussion?
Please be thoughtful, detailed and courteous, and adhere to our posting rules. Edit Preview. H1 H2. Post Reply. Insert Code Block. Share Post. Permanent Link. Promote Question. Would you like to see this question answered quickly?All rights reserved. Welcome to the world of sound synthesis!#2 Generating Sound - Sine Waves
It's dangerous to go alone, but with this book as your guide, you'll be making sounds from scratch as soon as possible. That book introduced the Beads library specifically within the Processing ecosystem.
It is aimed primarily at visual artists who are interested in sound and musicians who are interested in multimedia. Since writing that book, I realized that there are a lot of programmers and musicians who also love modular synthesizers.
They often spends thousands of dollars on modular synthesizers, or learn to create synthesizers using environments like Max, Pure Data, Tassman, or Reaktor. All of those are great systems, but with the exception of Pure Data, they are expensive. Also, each one requires a special set of programming skills.
Max, Pure Data, Tassman, and Reaktor are all based on similar concepts, but each is its own unique system. This book is an attempt to teach sound synthesis using only free open source software and the most universally taught programming language, Java. This book is aimed at a wide audience. I started it with the intention of aiming only at advanced programmers, but I've added content that should make it a good tutorial for even beginner programmers.
This book will be much easier for readers who have taken an introductory Java course, but a beginner programmer should be able to follow along if they supplement the early chapters with other java tutorials online. You don't need to know anything about music to work through this book. You might have more fun if you have a MIDI keyboard and can play it. Still, I think some of the most interesting synthesizers are created by people who come from a non-musical background, and most of this book does not require a MIDI keyboard at all.
This book is written by and for explorers and experimenters.
I'm not a guy who can explain the science of sound or the deep mathematical connections between all this stuff. I'm a guy who loves to experiment with code, and I hope to share my enthusiasm with you in the pages of this book. This book is a pretty comprehensive source on basic synthesis techniques in java, but there are many websites and books that offer other perspectives on closely related material.
You may find these valuable as you work through this book, or if you want to go further after reading this book. It has been the standard synthesis textbook since the s. At this point, it is somewhat dated, but it still offers a reasonably comprehensive look at computer music technology. Musimathics by Gareth Loy is an examination of the elegant math that underlies our perception of music. Designing Sound by Andy Farnell is about using synthesizers to simulate sounds that are generated by real world objects.
The code is written in Pure Data, but the concepts are valuable to anyone who wants to really understand sound synthesis. Synth Secrets by Sound on Sound is probably the most comprehensive source on general synthesis techniques on the web.
The series began way back inbut the concepts are still mostly the same. If you're more interested in hardware synthesizers, the synthesizers subreddit is very active and full of people who are passionate about synthesizing sound.
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