Qa403 using a pc mirroring to test a dac

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G’day Guys,
I have been playing around with my QA403 to measure several DIY and commercial DAC’s I have laying around. I one particular dac, a SMSL D300 when the sig gen 1 is set for 1KHz and have the output is mirrored to the PC driving the dac, the frequency is shifted to 1.4106KHz. With all the other 4 dacs tested this didn’t occur. Any clues guys?

Cheers

Rob

smsl d300 dac
smsl d300 dac1920×1028 150 KB

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Hi @totaltech, the sample rates need to match between the QA40x and the DAC. I’d first start with the QA40x at 48k, and set your PC sample rate to 48 and see if you can get it to make sense there.