Request: Nyquist code for deliberate feedback

Thanks Robert ,
is it possible to have a Low Frequency Oscillator as the second argument of “feedback-delay” to provide Amplitude Modulation of the combed content ?

I had to use this arrangement to amplitude-modulate each of the "feedback-delay"s by a different LFO …

(setq A1 (hzosc 0.5))
(setq A2 (hzosc 0.333))
(setq A3 (hzosc 0.1234))

(sim 
(mult A1 -0.5) (mult A2 -0.5) (mult A3 -0.5)
 (mult (sum 0.5 (feedback-delay s 0.01 0.015)) A1)
 (mult (sum 0.5 (feedback-delay s 0.03 0.05)) A2)
 (mult (sum 0.5 (feedback-delay s 0.05 0.07)) A3))


spectrogram of code applied to white noise, has a woven pattern.gif