bass (amp, cps) = sig amp * once env * osc (sig cps)
    where env = eexps [1, 0.00001]
bass (amp, cps) = sig amp * once env * osc (sig cps)
    where env = eexps [1, 0.00001]
bass (amp, cps) = sig amp * once env * osc (sig cps)
    where env = eexps [1, 0.00001]