SMD-IC's

Yamaha OPL3-FM Synthese IC, case SOP24

Datasheet:

Yamaha 2 channel floating D/A converter, case SOP16

Datasheet:

• high performance Reverb, Delay, & Chorus • Superior sound quality • 16 great Programs so you can select the right sound for your [...]

Delay IC manufactured by Princeton to build a digital delay. Delay Time 342ms by a 2MHz clock(max. time with 50K pot 580ms). Case SOJ-16.

Dual OTA, Package SOJ16

Datasheet:

Low Voltage Microphone Preamplifier with Variable Compression and Noise Gating,
Gehäuse MSOP10

Datashe

Quad OPV, package SOJ14

Dual OPV with FET-inputs, Low noise, +/- 18V max, 75mW, 1Mhz, SR 13V/us, package SOIC-8