The AVH316B, AVH316C, AVH316D, AV0716C, AV0716D, AV1416D, AV2116A, AV2816A is a single-chip synthesizing CMOS VLSI that can synthesize voice up to 3.5,7,14,21,28 seconds using APLUS qualified coding algorithm (LOGPCM). Customer speech data will be edited and programmed into ROM by changing one mask during one mask during the device fabrication.