Buy two THAT4301P Analog Engine®, 20 Pin DIP, NOS.

THAT 4301 Dynamics Processor, dubbed "THAT Analog Engine®," combines in a single IC all the active circuitry needed to construct a wide range of dynamics processors. The 4301 includes a high-performance, exponentially-controlled Blackmer® VCA, a log-responding RMS-level sensor and three general-purpose opamps.

Note that the product may be marked differently due it being a later date code than the image shown.

FEATURES

• High Performance Blackmer® Voltage Controlled Amplifier (VCA)
• High Performance RMS-Level Detector
• Three General-Purpose Opamps
• Wide Dynamic Range: >115 dB
• Low THD: < 0.03 %
• 20 Pin DIP Packaging

APPLICATIONS

• Compressors
• Limiters
• Gates
• Expanders
• De-Essers
• Duckers
• Noise Reduction Systems
• Wide-Range Level Meters
• Electronic Music

The THAT4301 is used in the L-1 Vocoder and L-1 Microcompressor.

http://l-1.su/Vocoder.html
http://l-1.su/Microcompressor_stereo.html