Company Walthall and Associates Inc created these great apps:
Sound Made Simple iPA Professional, Sound Made Simple iPA - Sound & Hearing, Sound Made Simple iPA - Signal Path & Gain Structure, Sound Made Simple iPA - Mixing Consoles, Sound Made Simple iPA - Equalization, Sound Made Simple iPA - Acoustics, Sound Made Simple iPA - Microphones, Sound Made Simple iPA - Signal Processors, Sound Made Simple iPA - Power Amplifiers, Sound Made Simple iPA - Loudspeakers, Sound Made Simple iPA - Cables, Connectors & Impedance, Sound Made Simple, and others..