Why do you think that? Because it says 'low cost' in the datasheet?
The 8692 is a high performance, single-supply device, intended for portable audio devices.
If you guys don't understand that cost and performance aren't synonymous, then it won't be any surprise to the rest of us when you end up breaking your DAPs.
Wiring in a dual-rail device and wiring in a negative supply will have unknown consequences in terms of the output DC offset of the DAC section without detailed knowledge of the circuit. This will have an unknown knock-on effect on the amplifier section. A single-rail supply device has been employed for some reason when a dual-rail supply was available. The DAC output is almost certainly a current one, and the opamp is being used for I-V conversion. Current-output DACs frequently have a DC output offset to keep the (dual-rail) opamp working in class A, but this may not have been considered desirable in a battery-powered device because of the drain on the battery, or there may have been some other reason, but whatever it is, you don't know.
Get a grip, and don't mess with what you don't understand.
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