Yes! All schematics are done! I finished the design for the delay. It is based on the Deep Blue Delay schematic.

It works like this: The input stage on the op-amp (U20B) acts as a buffer that mixes the clean audio signal with the processed sound from the feedback loop. The PT2399 chip digitizes the audio, cyclically delays it in RAM, and then outputs it back, with the delay time being adjusted by the RV24 potentiometer. Potentiometers RV22 (Repeats) and RV23 (Mix) are used to adjust the number of echo repeats and the balance between the clean and processed signals. The final op-amp stage (U20A) functions as an active low-pass filter, which smooths out the digital steps of the audio and gives the effect a warm analog sound. At the very end of the circuit, the C86 coupling capacitor cuts off the DC voltage component, while the R144 resistor bleeds residual static voltage to ground, preventing switching pops before the signal is fed to the output jack J2.