Pt2399 simple delay circuit full#
It means that a delay can be generated quite easily without the need of as many conditioning circuits as the BBD. The PT2399 operates at full fidelity only to a maximum delay time of 350ms, like many real analog delays, but through various techniques can be coaxed into delay times up to 800ms or so. Delay time is controlled via a current sink on pin 6. This so-called digital delay chip has the advantage of directly including an ADC, DAC, RAM and clock. PT2399 is a delay chip, much loved for its ease of use and low cost. This digital chip includes an ADC (Analog to Digital converter), 44Kb of RAM to store the samples and a DAC (Digital to Analog converter). the pt2399, the simplicity and flexibility of the analog-voiced delay !Ī more recent solution is the PT2399, created by Princeton Technology Corp. The PT2399 is a CMOS echo/delay processor developed by Princeton Technology Corp. Finally, maybe the real analog delay is still the tape delay, and analog-voiced delay is the technology to get as close to it as possible. A very simple one chip plate reverb, based on the pt2399s datasheet surround delay example circuit with a few modifications. It is this analog circuit that will give the sound texture. It consists of a delay line close to digital treatment, but surrounded by a fully analog circuit. So in my opinion, the BBD is more like an analog-voiced delay than a fully analog delay. But this is what also makes its characteristic sound, which can also remind the saturation of a vintage analog tape delay ! These losses add white noise and prevent bright and clean repetitions.
Pt2399 simple delay circuit code#
But of course this is not pure digital with code written in a processor ! In addition, in the same way as the example of the “Bucket Brigade”, where losses can occur with each water transfer, the BBD generates losses of information. Also if you are using a 78L05 regulator for the 5v supply, some people claim that they do not provide enough current. So we obtain a circuit with constraints similar to a digitization. The PT2399 performs low distortion (THD<0.50.5Vrms) and low noise (No<-90dBV) characteristic for audio purpose, and pin arrangement and application circuit. Ive noticed that PT2399 based delays will not work when running from a battery, but will work fine with an external power source that can provide sufficient current. Delay line based on a BBD chip : the circuit looks like a series of sample and hold circuits driven by a clock, and requires a lot of external units that will modify the signal dynamics.
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