ALFA RPAR is a semiconductor manufacturer bases in Riga, Latvia. ALFA RPAR specializes in reproductions of classic ICs used in audio circuitry, including the AS3340, AS3320 and AS330
AS3340 - Voltage Controlled Oscillator ( VCO )
AS3340-HYB Voltage Controlled Oscillator for circuits where requirements on influence of PWM signal on frequency are strict.
The AS3310 is a self-contained, precision ADSR type of envelope generator intended for electronic music and other sound generation applications.
AS3320-Voltage controlled filter (VCF)
AS3360-Dual Voltage Controled Amplifier ( VCA )