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MP3 Encoding Technology

The MP3 is a complete godsend for anyone who enjoys and appreciates good music. Not only does it afford users the convenience of purchasing music online and ripping from purchased CDs, it also provides the utmost ease in portability. There are more MP3 players on the market than I can name. These players allow you to download hundreds and in some cases thousands of MP3’s to take along with you anywhere. I create MP3 CD’s containing up to 120 of my favorite songs for my listening pleasure in my car. But how can so many audio files get stored on my 800MB (Megabyte) CD?

MP3 Encoders and MP3 converters are the software that creates MP3s by using an MP3 compression and decompression algorithm. For example, an average 3 minute WAV file can be as large as 15MB. Using MP3 encoders and MP3 converters, a large WAV file can be cut down to a much smaller and more portable MP3 file of about 3MB.

MP3 stands for MPEG Audio Layer 3. At layer 3, psychoacoustics principles are used to find and remove all unnecessary sound data, leaving behind only the crucial audio data. By unnecessary sound data I mean all of the stuff that we humans don’t hear anyway. Most people can’t hear sounds above 16 kHz so why would you want it hogging your disk or hard drive space? Non-music audio such as speeches, sermons, audio books and comedy albums, can be reduced even less based on this.

Compression occurs after the essential data has been separated from the redundant data. At this stage, the same amount of data can be stored using fewer bits and less space. The bit rate is the ratio of the number of bits transferred between two devices per second. The higher the bit rate, the higher the sound quality. The lower the bit rate ratio, the lower the sound quality. 192 Kb/s is the most popular bit rate used in peer-to-peer networks. For the most part, MP3 converters and encoders today use variable bit rates. This allows for much better quality audio because the bit rate conforms to the dynamics of the audio frames being stored which in turn keeps more of the important music data.

There are dozens of MP3 compressor and encoder software programs available online and at stores. Some of the main encoding engines are: LAME, Blade Enc, Fraunhofer Encoders and Xing. Deciding which MP3 encoding engine technology is right for you depends on your individual needs and preferences. Blaze Media Pro is an excellent option if you're looking for a powerful, yet easy to use, all-in-one multimedia solution.

Mansi aggarwal writes about MP3 encoder.

How To Buy An MP3 Player

Are you looking for an MP3 player but am not sure which type and model to buy? There is a wide variety of MP3 players out there, from flash memory based players to hard drive based players. Choosing a good player from the market is no easy task. What features should you look for? What are the key considerations? This article aims to answer those questions and more. Now, let’s see how we can pick the perfect MP3 player.

Types of MP3 player

There are essentially four types of MP3 players in the market today. These include flash-based players, hard-drive based players and MP3 CD players. Let’s look at them in turn.

Flash-based MP3 players

Flash-based MP3 players have a flash memory chip built-in. They tend to be very tiny, ultra-portable and have no moving parts. As a user, you can do all your sports activities without worrying about your music skipping a beat. The downside to flash players is their high cost per megabyte. These players range from 32MB to 2GB, and the most popular models tend to be those from the Creative Muvo line, the iRiver iFP series and more recently, the Apple iPod Shuffle.

Hard-drive based MP3 players

Hard-drive based MP3 players use a 1.8-inch hard disk drive to store your music. The hard disk can hold large amounts of music – we’re talking about 10GB and above. If you have a large music library and want to store tons of music, a hard-drive based MP3 player is the way to go. The cost per megabyte is very low. The downside? Well, due to the hard disk drive, which has moving parts, these players are not suited for rough physical activity or extreme sports. One of the most popular MP3 players in this category is the Apple iPod, which is selling like hot cakes out there.

Micro hard-drive based MP3 players

More recently, manufacturers have come up with micro hard-drive based MP3 players like the Apple iPod Mini, Creative Zen Micro and Rio Carbon. Featuring a smaller hard drive (which still gives ample storage space of about 4 to 5 GB), they have a much more compact design compared to full fledged hard disk players. The few models mentioned above are selling like crazy too.

MP3 CD players

MP3 CD players are another type of MP3 player. These units look and feel like regular CD players. You can burn up to 150 MP3 songs to fill one CD-R disc, then play it on the unit. The disadvantage of such players is their large size and their tendency to skip if jostled.

Key Features of MP3 Players

Having looked at the different types of MP3 players, let’s look at the key features of an MP3 player.

Size and weight: If you’re looking to bring your MP3 player on trips or on sporting activities, a small compact design is very important. In such cases, you should go for a small flash based player or one of the micro hard drive players.

Storage capacity: This is an important factor too. If you need to store your whole music library into the MP3 player, then you probably need a hard drive based player with 10GB of storage or above. If you only want a few select songs to listen to on the subway, then a flash based player would suffice. Do take note that some players offer expansion slots in the form of CompactFlash or SD cards.

Battery Life: This is often overlooked. Battery life is a very important consideration, especially if you’re out with your player and have no way to recharge. Hard disk players tend to have lithium-ion rechargeable batteries while some flash players offer AAA battery support. I personally own a Creative MuVo Micro N200 which uses AAA batteries. This is great for me because once it runs out, I can just pop in a new one – no hassles about finding some electrical socket to recharge.

Connectivity Options: The way the MP3 player connects to your computer is also an important factor. The latest models tend to support high-speed USB 2.0 transfers. The better ones like the Apple iPod also give Firewire support.

File Format Support: You will most likely be wanting to play MP3 songs on your player. However, if you want to listen to a wider variety of music files, like WMA or OGG Vorbis, then make sure you see it in the player specs.

Other Considerations

Many of the latest players also include features I’ve not covered in the above. For example, some players come with a built-in FM tuner, which is very useful if you get tired of your MP3 music. Other have a built-in voice recorder which allows you to record audio as WAV files.

Conclusion

As you can see, there are many considerations to think about when purchasing an MP3 player. To get the most suitable player, you want to think about how you will use the player. Usage should drive your purchase decision. The other thing to take note of is to shop around, both online and offline – compare prices before shelling out the cash. Good luck hunting for that MP3 player!

Gary Hendricks runs a hobby site on digital photography. Visit his website at http://www.digital-music-guide.com for tips and tricks on selecting MP3 players, music services and music software.

Is Downloading MP3 From File Sharing Programs Legal?

File sharing programs such as KaZaa, Ares, iMesh and Limewire have never been more popular. They are pretty controversial as well. You may have heard of the countless lawsuits against them by music records companies and the MPAA. So is downloading MP3 from these programs legal?

How Do File Sharing Programs Work?

Modern file sharing programs connects users directly to each other allowing them to share and download files. They are also called P2P, or peer to peer programs. Unlike old file sharing programs such as Napster who ran all connections through their servers. That is also why it is sometimes difficult to determine exactly who is downloading what.

File sharing programs by themselves are not illegal. In fact, they are legitimate uses for it. For example, it is used by academy institutions and universities to exchange research data and cross learning. They are also used by musicians and artists to showcase their talents by distributing their music free through file-sharing networks.

Many people are confused as to what is legal to download and what is not. The problem stems from the fact that it is so easy to download illegal MP3 and other illegal files from these file sharing networks that people often do not know they are actually violating copyright laws.

They do not have sufficient knowledge of copyright laws. Current copyright laws allow an individual to rip MP3 provided he or she has brought a copy of the CD. However, he or she cannot give, sell or upload MP3 to others. Beware due to MP3 piracy, record companies have recently developed technologies that do not allow you to rip mp3 from CD. Add to that, they are dozens of websites on the internet proclaiming to be able to download mp3 and movies legally when they are not!

How to determine whether you can download MP3 legally?

Technically, any MP3 posted on file-sharing programs without the permission of the artist is illegal. Most commercial MP3 on file sharing networks are illegal, so my advice would be to avoid them altogether.

There are a few reputable MP3 download sites on the internet you can trust. The most famous of all is itunes from Apple. Napster has a subscription service per month that allows you to download more than two million mp3 legally. Technically, you do not own the mp3 so do not give, sell or upload to file sharing networks. For more information on where you can find more free legal mp3, you can visit my blog.

Ricky Lim blogs about current free MP3 download sites and MP3 converters. His Blog is part of the Infoknowledge blog network.

Capturing Streaming Audio to MP3

When Internet radio first began, about all a listener could do with it was, well, listen. And the listening experience wasn't very good. The sound was awful ... when it worked at all. Having the audio stream abruptly terminate, or take endless time to re-buffer, was a common occurrence.

Today, most Internet broadcasters use much better technology to send their streams into cyberspace. As well, more listeners are equipped with broadband Internet connections, good sound cards, stereo system-quality speakers and sophisticated media player software.

The listening problem has been overcome.

Now, what about the ability for a listener to capture those audio streams and save them to play back at will? The technology to do that was slower in coming, but it's finally here. With the right program installed, you can now capture those live audio streams from your favorite Web radio broadcasters and save them to your hard drive to enjoy as often as you like.

There are now several shareware and even freeware programs available for recording streaming audio. Their names include Voice Activation Interface, WMA/MP3 Recorder, Audio Record Wizard, Advanced MP3-WMA Recorder, Silent Bob, #1 Sound Recorder, Ace-High MP3 Recorder, 1st Easy Recorder, Visual Sound Recorder, Audiolib MP3 Recorder, Audio Playback Recorder, Loop Recorder, Replay Radio, FairStars Recorder, Boombox Internet Radio Player, and Easy Radio.

As you might guess, these programs vary greatly in both ease of use and in the features they sport. Some can convert an audio capture into a large number of different music file formats, while others can only handle one or two. Some, but definitely not all, will automatically remove noise and hiss from the audio. Similarly, some will remove gaps caused by buffering or network congestion.

One of the first, and still one of the best, audio capture programs is called Total Recorder. It can record PC audio from almost any source, including streamed audio, CDs, the computer microphone and other input lines.

You can download a free evaluation copy of Total Recorder, but it will insert a bit of noise about every 60 seconds throughout the recording. To be able to record audio without the noise, you must purchase a license for the software.

The recording software that I find really exciting is the kind that not only will capture an audio stream, but will also save it as separate audio files ... automatically. The most obvious use for this is to break up a music stream into individual song mp3 files. The best audio capture software that I know of, that includes this mp3 splitting feature, is called Radio2MP3.

Internet radio has finally come into its own. The sound is great and so is the diversity of programming. Being able to record all those wonderful radio streams is the icing on an aurally delicious cake.

Stefan Smith is a radio and music junkie who writes on these and other subjects for the Solid Gold Info Writers Consortium. Recently, he has written an extensive review of new software that anyone can use to capture music audio streams from Internet radio broadcasts and break them up into individual mp3 song files--a legal way to download virtually free music. Read the review at: http://www.solid-gold.info/radio2mp3.html