Month: November 2020

SoX is a cross-platform (Windows, Linux, MacOS X, etc.) command line utility that can convert various formats of computer audio files in to other formats. It can also apply various effects to these sound files, and, as an added bonus, SoX can play and record audio files on most platforms.

The screen-shot to the right shows an example of SoX first being used to process some audio, then being used to play some audio files.

10 Awesome Examples to Manipulate Audio Files Using Sound eXchange (SoX)

1. Combine Multiple Audio Files to Single File

using sox -m command mix the two audio file using terminal

$ sox -m first_part.wav second_part.wav whole_part.wav

(or)

$ soxmix first_part.wav second_part.wav whole_part.wav

2. Extract Part of the Audio File

Trim can trim off unwanted audio from the audio file. and set the custome starting and end time.

• SECOND TO START – Starting point in the voice file.
• SECONDS DURATION – Duration of voice file to remove
  

The command below will extract first 15 seconds from input.wav and stored it in output.wav

$ sox input.wav output.wav trim 0 10

3. Increase and Decrease Volume Using Option -v

Option -v is used to change (increase or decrease ) the volume.

increase volume : –

$ sox -v 2.0 foo.wav bar.wav

decrease volume : –

$ sox -v -0.5 srcfile.wav test05.wav

$ sox -v -0.1 srcfile.wav test01.wav

4. Play an Audio Song

Sox provides the option for playing and recording sound files. This example explains how to play an audio file on Unix, Linux.

Syntax :play options Filename audio_effects

$ play -r 8000 -w music.wav

5. Play an Audio Song Backwards

Use the ‘reverse’ effect to reverse the sound in a sound file. This will reverse the file and store the result in output.wav

$ sox input.wav output.wav reverse

You can also use play command to hear the song in reverse without modifying the source file as shown below.

$ play test.wav reverse

6. Record a Voice File

You can also use rec command for recording voice. If SoX is invoked as ‘rec’ the default sound device is used as an input source.

$ rec -r 8000 -c 1 record_voice.wav

7. Changing the Sampling Rate of a Sound File

To change the sampling rate of a sound file, use option -r followed by the sample rate to use, in Hertz. Use the following example, to change the sampling rate of file ‘old.wav’ to 16000 Hz, and write the output to ‘new.wav’

$ sox old.wav -r 16000 new.wav

8. Changing the Sampling Size of a Sound File

If we increase the sampling size , we will get better quality. Sample Size for audio is most often expressed as 8 bits or 16 bits. 8bit audio is more often used for voice recording.

-b Sample data size in bytes
-w Sample data size in words
-l Sample data size in long words
-d Sample data size in double long words

$ sox -b input.wav -w output.wav

9. Changing the Number of Channels

The following example converts mono audio files to stereo.  Use Option -c to specify the number of channels .

$ sox stereo.wav -c 1 mono.wav avg -l

10. Speed up the Sound in an Audio File

To speed up or slow down the sound of a file, use speed to modify the pitch and the duration of the file. This raises the speed and reduces the time. The default factor is 1.0 which makes no change to the audio. 2.0 doubles speed, thus time length is cut by a half and pitch is one interval higher.

Syntax: sox input.wav output.wav speed factor

$ sox input.wav output.wav speed 2.0

Happy coding ..

If you want to land a great JavaScript job or catch up on important tech for 2020 and important technologies in the new decade, this post is for you. The point of this post is not to tell you which tech stacks and frameworks are the “best” or most loved or most popular — but to shed some light on which ones give you the best odds of landing a great job in 2020 and beyond.It can be really hard to find the perfect framework for your requirements. In this article on the best JavaScript framework for 2020.

5 JavaScript frameworks : –

1. React js

React is a JavaScript library for building user interfaces. React js is most popular JavaScript frame work for front end web page designing and currently every front end developer react js is a first choice.

React is a front-end library developed by Facebook. It is used for handling the view layer for web and mobile apps. ReactJS allows us to create reusable UI components. It is currently one of the most popular JavaScript libraries and has a strong foundation and large community behind it.

2. Vue js

Vue js is a progressive framework for building user interfaces. Unlike other monolithic frameworks, Vue is designed from the ground up to be incrementally adoptable.

The core library is focused on the view layer only, and is easy to pick up and integrate with other libraries or existing projects. On the other hand, Vue is also perfectly capable of powering sophisticated Single-Page Applications when used in combination with modern tooling and supporting libraries.

3. Angular js

Angular is one of the most powerful and open-source JavaScript frameworks. Google operates this framework and is designed to use it to develop a Single Page Application (SPA).

This development framework is known primarily because it gives developers the best conditions to combine JavaScript with HTML and CSS. Over half a million websites, such as google.com, youtube.com, etc., use Angular.

jQuery is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers.

With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript.

5, Node.js

Node.js is an open-source, server-side platform built on the Google Chrome JavaScript Engine. The number of websites. It is one of the most downloaded, cross-platform runtime environments for running JavaScript code.

Node.js is an asynchronous, single-threaded, non-blocking I/O model that makes it lightweight and efficient. The Node.js package ecosystem, npm, is also the largest open-source library ecosystem in the world.

Happy coding ….

#javascript #framework