A Standalone Equal Temperament Generator & Basic Composer
Instruction: just download the ETComposer.html, then run on your browser.
This is severely limited in that there is no setting of dynamics and articulations, no percussion (future rhythm program?), and plays only one wave type (sine, square, triangle, sawtooth).
Distributed under the MIT software license. See the accompanying file LICENSE or https://opensource.org/license/mit/.