# Audio Streamer Evaluation using QA403

**URL:** <https://forum.quantasylum.com/t/audio-streamer-evaluation-using-qa403/1646>\
**Category:** QA40x\
**Created:** [December 15, 2024, 1:23pm UTC](https://forum.quantasylum.com/t/audio-streamer-evaluation-using-qa403/1646 "2024-12-15T13:23:31Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Protegimus](https://avatars.discourse-cdn.com/v4/letter/p/94ad74/32.png) [@Protegimus](https://forum.quantasylum.com/u/Protegimus)\
**Post date:** [December 15, 2024, 1:23pm UTC](https://forum.quantasylum.com/t/audio-streamer-evaluation-using-qa403/1646/1 "2024-12-15T13:23:31Z")

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Hello,  
I’ve read the “Rapid USB DAC Evaluation” so have part of the story and done some digging to see if there is any documentation available as to whether the QA403 can be used to test a network audio streamer.

The streamer has USB (plus two optical inputs - Toslink 1 & 2 and two coaxial inputs - 1 x RCA phono, 1 x BNC connection) in addition to Ethernet. My thought was that test-tone files could potentially be used to provide the reference signal.  
restorer-john’s [post](https://forum.quantasylum.com/t/testing-adc-with-the-qa403/1327/2) together with the other posts about input/playing .wav files is noted.

Can the QA403 be used to conduct impulse and further tests on the streamer and does anyone have any guidance on doing so and suitable reference .wav files?

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**Author:** ![Protegimus](https://avatars.discourse-cdn.com/v4/letter/p/94ad74/32.png) [@Protegimus](https://forum.quantasylum.com/u/Protegimus)\
**Post date:** [December 15, 2024, 5:43pm UTC](https://forum.quantasylum.com/t/audio-streamer-evaluation-using-qa403/1646/2 "2024-12-15T17:43:04Z")

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Found a commercial source [wavtones](https://www.wavtones.com/functiongenerator.php) for the reference waveforms after a bit more digging, so that’s that part covered off. Reasonable cost, anyone used them before?

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**Author:** ![restorer-john](https://avatars.discourse-cdn.com/v4/letter/r/b5a626/32.png) [@restorer-john](https://forum.quantasylum.com/u/restorer-john)\
**Post date:** [December 15, 2024, 9:30pm UTC](https://forum.quantasylum.com/t/audio-streamer-evaluation-using-qa403/1646/3 "2024-12-15T21:30:01Z")

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> [@Protegimus](#):
>
> Can the QA403 be used to conduct impulse and further tests on the streamer and does anyone have any guidance on doing so and suitable reference .wav files?

Are you wanting to do triggered acquisitions? (right click the run tile for details) or more like testing the streamer as a D/A converter in mirror mode? And impulse testing for filter types?

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**Author:** ![Protegimus](https://avatars.discourse-cdn.com/v4/letter/p/94ad74/32.png) [@Protegimus](https://forum.quantasylum.com/u/Protegimus)\
**Post date:** [December 15, 2024, 10:18pm UTC](https://forum.quantasylum.com/t/audio-streamer-evaluation-using-qa403/1646/4 "2024-12-15T22:18:51Z")

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Hi, yes that’s right, impulse testing for filter type/response would be most helpful.  
Matt’s blog post on “[Rapid USB DAC Evaluation](https://quantasylum.com/blogs/news/rapid-dac-evaluation)” probably covers everything I’ll need on that side.

There’s a brilliant [thread](https://forum.quantasylum.com/t/qa403-i2s-input-output/1441) on extending the I2S bus output to use SPDIF, Toslink for anyone that is interested.