Ad Lib planned a new proprietary standard before releasing the 12-bit stereo sound card called the AdLib Gold. The Gold 1000 used a later-generation Yamaha YMF262 (OPL3) and 12-bit digital PCM capability while retaining backward compatibility with OPL2 through the OPL3 chip. The onboard Yamaha YMZ263-F also performs 2× oversampling, which would affect the OPL3 output slightly.[9] A surround-sound module was developed as an optional attachment that allowed a chorus surround effect to be enabled for OPL3 outputs; however, few programs supported it.