Sound Blaster PCI 64

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.