Sound Blaster PCI 128

For one of these cards we tested the output signal was directly connected to the input so we had –20 dB cross-talk. This may be because the sound card was defect or badly constructed. This card was an early version of SoundBlaster 128, SB128PCT (CT4700). However, the SB128 PCI (CT4810) has been reported not to have this problem.

This sound device is very similar to Ensoniq Audio PCI, so the information given above should apply for this card also. When the card is used in full duplex mode, there seem to be an internal loop in channel 1 of the card. This gives a very high amount of cross talk, which makes channel 1 impossible to use for MLS measurements. Channel 2 does not have this cross talk and can be used.