DataMatrix is an interesting 2D Barcode that you can generate at invx.com. DataMatrix is more used in the West — in Asia, QR Code might be the more frequently used barcode.

media.io is a really good WAV to MP3 Converter online. media.io uses the popular LAME encoder.

If you would like to convert MP3 to WAV online, you can do so at http://media.io. It’s fast, free and – well – online!

media.io supports various audio formats, such as WAV, MP3, AAC, Ogg Vorbis and others.

WAV can easily be converted to MP3 even by people with few technical skills using an online WAV to MP3 converter. The good ones let you download your converted MP3 file immediately.

WAV is a basic, but ubiquitous audio format with a large range of applications supporting it. For usage on digital music players, WAV uses too much space however. A free web application called media.io lets its users convert WAV to MP3 online without any hassle.

M4A is the file extension of MPEG-4 audio. While it is not possible to convert M4A to MP3 online without losses — both MPEG-4 and MPEG-1 Layer 3 are lossy audio compression formats —, the conversion may be convenient for many people.