monotraditionaldelay~

This block delays an incoming signal and outputs the wet signal on one channel. The original signal is not throughput. It works like the traditional delays, this means with a feedback loop. Users can change the two parameters with the visible controls, or they can vary them by using the two other inputs.

version

v1.0: built 28/03/2007 with Pd v0.40-2 [pd] [pdf]

interface

Input 1: the mono signal you want to delay
Input 2: the delay time parameter
Input 3: the feedback parameter

Output 1: the delayed, wet mono signal

Controls:
top number box and horizontal slider: adjust the delay time (DLY) parameter. It specifies how long it takes in milliseconds before you hear the following repetition. It ranges from 0msec tot 3000msec (3 seconds). This is not only the maximum value of the slider and number box, but also the length of the delay line used in the implementation.
bottom number box and horizontal slider: adjust the feedback (FBK) level parameter. The signal is attenuated with this value divided by 1000. In other words, you can vary the level from 0 (no delay audible) to 0.999 (maximum amplitude of the delayed signals, keeps on repeating as if it never ends) with steps of thousands.
switch-off button: is used to reset all the parameters to 0 and thus turning of the delayed signal.
TO DO: It might be better to call the switch-off button a reset button, implying that after pressing it, the values will not be remembered.

implementation

The delay itself is pretty simple: the incoming signal is read by a delread~ object that writes the signal into a delay line called delay1 and with length 3000msec. Although there's no visible loop, this is how the loop is formed: after a delay time DLY the associated delread~ object reads what's in the delay line, outputs it and sends it back into the delwrite~ object. Before outputting the delayed signals they are attenuated every time by a factor FBK ranging between 0 and 0.999 (with 1 clipping is to easy), in steps of thousands. That's why the control parameter lies between 0.001 and 999.
A possibility is left in the implementation to also mix the wet output with the original, dry signal, by connecting the unconnected throw~ and catch~ objects.
TO DO: It's possible to also implement an HF DAMP function which simulates a retro analog delay effect. It's nothing more than adding a lowpass filter with fairly high cutoff frequency (or even adjustable) in the delayline.