Distortion
dist = T("efx.dist", pre=-60, post=18, freq=2400, ...);
// pre [Object] Pre gain (dB)
// post [Object] Post gain(dB)
// freq [Object] Cutoff frequency of LPF
// ... Input objects which will be added and processed
dist.pre // [Object] Pre gain (dB)
dist.post // [Object] Post gain(dB)
dist.freq // [Object] Cutoff frequency of LPF