AP -- Competition is heating up among makers of digital music players.Apple's ipod is the top seller. The company that made the first digital player, Rio, is answering back with the "Nitrus". Kevin Yeung with Rio says Nitrus is a little thicker than a credit card, but it holds a lot of music. It holds about 375 songs which is about 25 hours of music. Yeung says Nitrus is a great compromise between carrying a huge boombox and a small flash player. Rio made the first digital music player. Financial problems with its parent company prevented Rio from working on new technology. Rio is now under new ownership and the company is looking to get back its competitive edge. The Nitrus costs 299 dollars. The company selling six other new digital audio players. AP Links: www.rioaudio.com Copyright 2003 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.