It looks like your audioengine DAC has a USB input, try connecting the laptop to that so that it shares the input with whatever you are streaming to the DAC. I'm not familiar with that particular product, but it looks like it should be able to work with more than one source at a time.
Alternatively, you could just get another USB DAC to connect the laptop to the receiver.
HT: Sony 940C, Oppo 203, Harman/Kardon DPR1001, Infinity Interlude IL40 x2, Infinity Interlude IL36C, Infinity MS-1 ii x2, Infinity MSW-1
Computer: Elac Uni-Fi UB5 x2, Elac Element EA101EQ integrated amp, SVS SB-12NSD
Dedicated 2-channel: Infinity Intermezzo 4.1t towers, Bluesound Node 2, Emotiva PT-100, Crown XLS 1502, Furman PL-8C