a show on the College/Indie Rock channel Left of Center. The show lets music bloggers talk about the latest in the indie-rock scene. Aggregators Aggregators such as The Hype Machine and Music Blogtrotter track MP3 blog posts and display the most recently updated posts on its front page. The services are meant to provide a snapshot of what's going on in music blogging and make it easier to search through recently posted MP3s. The Hype Machine features a list of the most popular tracks of the last three days, as well as the most blogged bands and most popular searches. In June 2009, the popular songs list was altered so that it is only affected by user accounts that are several days old, after it was discovered that the "hearts scores" for dozens of songs were being artificially inflated by dummy accounts, often created in batches numbering in the hundreds. Elbo.ws had a similar feature listing which Bands, Tracks, and Videos are currently "hot." However Elbo which had been around since 2005 shut down in late 2013. Music Blog Aggregators have caused a boom in MP3 blog readership and accessibility. Aggregators use RSS technology to collect data from MP3 blogs and link to the individual blog posts instead of directly to the MP3s. The Hype Machine does not list blogs whose writers or editors are involved in the music public relations industry. Legal status Many MP3 blogs post copyrighted material as a free download. While this is essentially illegal, record companies often turn a blind eye because of a belief that the blogs constitute free advertising. Bands such as Clap Your Hands Say Yeah and The National have reported increases in sales as a result of attention from MP3 blogs, which often provide links to legal album downloads. MP3 bloggers commonly post disclaimers stating that all files are intended only for sampling, and often remove posted files within a short period of time. The economic significance of MP3 blogs is relatively small compared to peer-to-peer networks. In addition to providing free music, many popular MP3 blogs have started their own DIY record labels, often providing publicizing services free or little money. A few blogs that have emerged in the recent times are Another Banger, Pitchfork, Electro Wow, and Youredm References External links RIP CDs Consider the alternatives to compact discs, San Francisco Chronicle Listen. And Learn, The Boston Globe Warner's