GetLoFi points out this interesting instructable – build a feedback add-on for use with cheap digital delay effects pedals. Enter the “Apocatastasis” –
Most expensive analog delay pedals have a feedback knob that lets you drive the output of the delay effect back into the input. My Ibanez DL5 Digital Delay did not have this feature, so I decided to make one and make it cheap.
Sure to be handy for achieving that retro-cinema ‘sting’ of despair – and countless other sonic atmospheres of the echoey-bizarre variety. – Apocatastasis (feedback return for cheap digital delays)