DailyTech - Microsoft's Zune portable audio player may not exactly be setting the sales charts ablaze, but it did make a respectable showing during its first few weeks on the market. According to market research firm NPD Group, the Zune managed to capture second place in the digital audio player market in its first four days of availability. For its first week, the Zune managed to grab 9% of the market according to NPD. "Considering it is a new brand, it's a very good first-week showing," said Ross Rubin of NPD Group. Rubin went on to say "For a new brand that received limited to mixed reviews, and which is incompatible with the leading music store (Apple's iTunes,) as well as other music stores, it was a good launch." It's a strong showing indeed by Microsoft, but only time will tell if the Zune has the stamina to make in further inroads on Apple's dominate iPod range. Apple's line of portable audio players which consist of the iPod, iPod Nano and iPod Shuffle captured a whopping 63% for the same week period according to NPD.