The PT2399 is a delay/echo integrated circuit by Princeton Technologies. Although digital in nature, it is frequently used to emulate the sound of analogue (BBD-based) delay circuits by means of additional filtering. Recently, it has also found use in modulation effects such as the Little Angel and One-chip Chorus, as well as a dual-PT2399 DIY reverb circuit - the Equinox.
The PT2399 is powered by a 5V supply, which necessitates the usage of a voltage regulator such as the 78L05 in (mostly 9V) stompbox circuits.
See also Category:PT2399 circuits
| List of integrated circuits