Watch Beats of the Heart: Tex-Mex Music of the Texas-Mexican borderlands (1982) : Full Movie Online Free Along a thousand miles of the Rio Grande, Mexican and American cultures have mingled to produce Tex-Mex music – the impassioned statement of the border people. Since the Mexican revolution, this music has been the mouthpiece and spirit of the Tex-Mex community. Today, like most border regions, the area is a cultural melting pot, marked by violence and drug running, illegal immigrants and shady business dealings.