Indie is a designation of an economic condition. Or at least indirectly, since it is used to identify a band (or movie, app, …) that is independent of major corporation influence in the practice of its art. That independence comes at the sacrifice of an influx of funding from a corporate entity (either because it’s not offered or because it’s refused).
With the limited budgets, Indie music tends to lack the instrumental richness of well-funded bands. Bringing extra musicians into the studio may be affordable, but Indie bands need tour revenue to survive and it’s risky to have a lowered-production sound during live performances or to fill-in the sound by synchronizing the on-stage musicians with a recording of the other instruments. The same reasoning applies to the vocals that are typical of Indie music. Most Indie bands aren’t in a position to increase the number of people who receive a share of revenue, even if the quality of the vocals is noticeably improved.
“Little White Lies” by Echotape
“We've Been Dreaming” by Echotape (One of our favorite videos.)