Web technologies enable the development of interactive multimedia content that can be embedded into web pages or run as web browser applications. The combination of Web Audio and Scalable Vector Graphics is a practical solution for making intuitive, interactive applets that are effective tools for teaching music technology. Interactive applets with visual and auditory feedback help to illustrate various theoretical concepts and their practical outcomes. Several such applets are used for ear training of sound engineering students in the Digital Audio Arts program at the University of Lethbridge. The Noise Spiral applet has been designed to teach frequency band recognition; we describe its use, discuss other similar applets, and present an outlook on future possible integration of Web Audio into technical ear training. The source code is freely available; we hope that it could be a starting point for the development of additional ear training tools that would improve the delivery of this essential part in education of future audio professionals.
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