Tunespeak, the St. Louis-based startup that serves as a band loyalty platform, is nearing the completion of a $750,000 funding round. The startup, which works with high-profile musical acts that include Dave Matthews Band, Kings Of Leon, John Mayer and Miranda Lambert, has raised a majority of the $750,000, said Tunespeak co-founder Tom Pernikoff. Pernikoff did not disclose exactly how much the company raised. According to a filing with the Securities and Exchange Commission, Tunespeak raised $300,000…