PS-2

Digital Pitch Shifter/Delay

The PS-2 was the first pitch shifter made by Boss and one of the first pedals with dual boards. It works both as a pitch shifter and a digital delay and it is perhaps surprising that it doesn’t use the same chip as the DD-3 and DSD-3. Pitch shifting is limited to one octave up or down while maximum delay time is 2 seconds.

The earliest PS-2s suffered from high frequency noise. This was alleviated from serial number 845800 but earlier units can be modified to the later specification by changing 3 capacitors. Production was moved from Japan to Taiwan early 1992.

The PS-2 has a total of 6 different modes:
Up to 125 ms delay
Up to 500 ms delay
Up to 2 seconds delay
Set pitch shift manually
+1 octave
-1 octave

Specifications
Controls: Balance (between effect in direct signal), Feedback (for amount of repeats, and very unique pitch shifting effects), Fine-Manual (for adjusting delay times and pitch) and Mode (for selecting any of the 6 modes).
Connectors: Input, Output, Tuner Out (for plugging into a tuner), AC Adaptor
Current Draw: 60 mA (DC 9V)
Weight: 460g/1.01 lbs.
Input Impedance: 1Mohm
Residual Noise Level: -90dBm (IHF-A)
Recommended Load Impedance: 10kOhm or greater
Delay Time: 30ms to 2000ms
Frequency Response: 10Hz to 30kHz, +1/-3dB (Direct)
Recommended AC Adaptor: PSA Series

The PS-2 was sold from October 1987 to March 1994.

http://www.bossarea.com/boss-ps-2-digital-pitch-shifter-delay/