Final answer:
ArtistShare and PledgeMusic are crowdfunding portals that specifically support music projects, helping artists in various genres to produce and distribute their work globally.
Step-by-step explanation:
ArtistShare and PledgeMusic are crowdfunding portals that focus almost exclusively on music. These platforms allow musicians to fund their projects through fan contributions, which has become particularly valuable in an era where traditional music formats like CDs have seen a decline. With the reduction of mass-market pressures, thanks to the accessibility of web-based commerce platforms like Amazon, artists in genres that have smaller audiences, such as classical and jazz, can also produce and distribute their work to a global audience.