Product Overview
A quick summary of the features:
- 0 → 4 Seconds of digital delay
- 12 bit/32KHz input, 16 bit/32KHz output
- Delay trails (tails) on/off
- Clickless effect in/out bypass switching
- Momentary/latching feature on bypass switch for “echo splashes”
- Tap tempo
- Tempo LED to indicate echo rate
- Dry audio path is entirely analog
- Delay Time, Repeats, and Delay Level controls
- High and Low tone filter controls
This project is based on the dsPIC 33FJ64GP802 chip, with a couple of 23LC1024 1Mbit/128KB serial RAM chips for the storage. The dsPIC includes a 12-bit ADC and a 16-bit DAC on-chip. The initial sampling is done at 12-bit resolution and 32KHz, but after that, all the internal processing is 16-bit, and the final output is actually 16-bit/32KHz. 12-bit/32KHz is a typical specification for a rackmount studio delay processor of the 1980’s. The sound quality is very good, without being super-clean or sterile. It certainly beats the PT2399 hands down, and it doesn’t suffer from worse and worse quality as the delays get longer either.
