Changes

This The main difference with this version of DigiBlaster is the additional Line-in connector which allows the user to feed the AY output through the card so that both sound sources are played through the same speakers. The DigiBlaster has been made dual-mono so that both speakers play the sample as is done with the AY-3-8912 Channel B. The variable resistor RV1 adjusts the Digiblasters output level to balance it to the AY level. Unlike V1 + 2, which can be used with a passive mono speaker, the output of V3 has been brought down to Line-out levels and so should be connected to active stereo speakers.