When was compact disk invented

Cassette tapes used magnetic tape, and the music played through from left to right. Once one side was done, you flipped it over for more songs on the other side. Even though cassette tapes were small, CDs soon became more popular because you could skip directly to the song you wanted to listen to.

By , over billion CDs had been bought and sold around the world. In , iTunes was launched by computer company Apple. For the first time, people could buy songs online individually instead of having to buy whole CDs.

Plus, you could store the songs in playlists on your computer. In , music streaming site Spotify was launched.

It offered the chance for people to listen to unlimited music in return for a monthly subscription fee. A total of 91 billion songs were played on Spotify, Apple Music and their competitors last year - the equivalent of 1, songs per person in the UK. To enjoy Newsround at its best you will need to have JavaScript turned on. How listening to music has changed. World Radio Day Five times radio changed the world. Not only were the techniques used at the limits of what was achievable at the time, but also the biggest problem was that in a short time four different and incompatible quadraphonic systems came onto the market at the same time!

This meant that music enthusiasts had to buy four different decoders plus a new pick-up element with a specially shaped diamond needle to allow them to listen to the different quadraphonic records!

The digital era. Shortly after the demise of quadraphonic sound, the electronics industry moved into the digital era, and particularly optical recording. Following the pioneering work of Philips on an optical video player in the early 70's, a project was started in within Philips and its Research laboratories to develop a digital optical audio disk with error correction code. Parallel work on digital optical audio recording was done in a number of companies and Sony first publicly demonstrated an optical digital audio disc at the Audio Fair.

On 8 March , Philips demonstrated for the international press a The demonstration showed that it is possible by using digital optical recording and playback to reproduce audio signals with superb stereo quality. Through the co-operation with Sony the final diameter was 12 cm and the initially proposed resolution accuracy of 14 bits was increased to 16 bits.

With this concept Philips and Sony took the first step in setting a worldwide standard. In January of , the CD was awarded as the most valued Philips innovation, voted by readers of the Eindhovens Dagblad and listeners of Omroep Brabant, as well as by Philips Research employees. Both the public and the Research employees were unanimous in voting for the CD as the winner. Want to learn more about the history of the CD? Peek here.

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Philips makes no representations or warranties of any kind with regard to any third-party websites or the information contained therein. The history of the CD - The beginning. For over 25 years, Stephanie has used her voice to communicate what is most important to her through the spoken and written word. Possessing a great love for imparting knowledge and empowering others, Stephanie has been a contributor to The Huffington Post, Backstage magazine, Stage 32 and the Voices. Inspiration How Sympaphonic Ads Skyrocket Audience Engagement Digital audio advertising is a growing area of marketing and sympaphonic ads are just one way you can use utilize it!

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