# Run test-flow / FFT with locally stored audio-file?

**URL:** <https://forum.quantasylum.com/t/run-test-flow-fft-with-locally-stored-audio-file/88>\
**Category:** QA401\
**Created:** [May 13, 2020, 4:09pm UTC](https://forum.quantasylum.com/t/run-test-flow-fft-with-locally-stored-audio-file/88 "2020-05-13T16:09:09Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@matt](https://forum.quantasylum.com/u/matt)\
**Post date:** [May 13, 2020, 5:33pm UTC](https://forum.quantasylum.com/t/run-test-flow-fft-with-locally-stored-audio-file/88/2 "2020-05-13T17:33:00Z")

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Hi @audio-dav, Your first setup should work fine where you are using the QA401 DAC to drive a speaker and then capture that back into the QA401. The first link below is similar problem, but comparing a mic to a reference mic. But in your case, you can readily capture the chirp and compare to a mask.

For your question about loading a captured chirp into the QA401 software…that’s not currently possible but it’s a very reasonable feature request for the future (but not near term, unfortunately).

1. [Mic Comparisons under Tractor](https://forum.quantasylum.com/t/mic-comparisons-under-tractor/46)

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