Sound Performance Lab Model 2591 Applications and Modes of Operation, GND Lift Switch Rear Panel

Control Elements

GND Lift Switch (Rear Panel)

The GND Lift switch separates internal ground from chassis ground. The switch can be activated to eliminate ground loop humming which may occur if the MixDreamXP is connected to units with a different ground potential. The switch should normally be in the GND position to maintain the shielding effect of the metal housing.

GND LIFT

Applications and Modes of Operation

Summing

Tracks destined for analog summing are routed from the DAW to the MixDreamXP via A/D converters. Identical converters are ideal to exclude level and sound differences.

Although you may often wish to sum more than 16 tracks, a general recommendation to reduce track numbers is to route those tracks to a common output bus of the sequencing program which are not played back simultaneously in your arrangement. This way you avoid digital summing and your production bene- fits from the full potential of 100% analog summing.

With mono signals one should switch these to mono mode to confine them to single D/A converter, thereby avoiding the waste of having to use a D/A pair for one mono track (see „Mono Switches“ on page 10). IMPORTANT: In the DAW such signals must be panned hard left or right.

Summing of Subgroups

To reduce track numbers, there are two other options besides the above mentioned „Summing“ tip:

Well, you could buy additional MixDreamXP (which we confess would make us happy—and we‘re sure would not disappoint you) or sum your grouped tracks with the MixDreamXP itself.

For example, if you‘ve done a chorus backup in 16 solo tracks, you can adjust your panning in the DAW and the MixDreamXP sums a stereo mix which is recorded again—the sound benefits of analog summing are larger than the disadvantage of a further A/D-D/A conversion.

MixDream XP 11