# QA403 ASIO Driver

**URL:** <https://forum.quantasylum.com/t/qa403-asio-driver/681>\
**Category:** Uncategorized\
**Created:** [May 4, 2022, 1:00pm UTC](https://forum.quantasylum.com/t/qa403-asio-driver/681 "2022-05-04T13:00:47Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![RFEngineer](https://avatars.discourse-cdn.com/v4/letter/r/59ef9b/32.png) [@RFEngineer](https://forum.quantasylum.com/u/RFEngineer)\
**Post date:** [May 4, 2022, 1:00pm UTC](https://forum.quantasylum.com/t/qa403-asio-driver/681/1 "2022-05-04T13:00:47Z")

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I own the QA401 and it works well with dechamps’ ASIO driver for use with 3rd-party analyzer programs like SpectraPlus-SC. I’m considering the purchase of a QA403. Is there any reason why the same ASIO driver can’t be applied to the QA403 model?

[GitHub - dechamps/ASIO401: An unofficial ASIO driver for the QuantAsylum QA401 audio analyzer.](https://github.com/dechamps/ASIO401)

Paul

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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 4, 2022, 3:49pm UTC](https://forum.quantasylum.com/t/qa403-asio-driver/681/2 "2022-05-04T15:49:41Z")

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Hi @RFEngineer,

The number of relays in the QA403 and QA402 make it hard to use with normal audio analysis software. While the QA401 had a single relay on the input (2 gain states), the QA403 has 4 output gain stages and 8 input gain stages. And so, to effectively use the device you need the ability to change relays often AND have the software understand. I don’t think there’s a good solution at the moment for working around this unfortunately.

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**Author:** ![JEJ](https://avatars.discourse-cdn.com/v4/letter/j/b782af/32.png) [@JEJ](https://forum.quantasylum.com/u/JEJ)\
**Post date:** [May 8, 2022, 3:36pm UTC](https://forum.quantasylum.com/t/qa403-asio-driver/681/3 "2022-05-08T15:36:35Z")

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I downloaded dechamps Flex ASIO driver and have SpectraPlus software and the QA403. However, I cannot find the flex asio driver in the SpectraPlus in/out device panel nor the QA403. What is the setup procedure?

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**Author:** ![Moto](https://avatars.discourse-cdn.com/v4/letter/m/2bfe46/32.png) [@Moto](https://forum.quantasylum.com/u/Moto)\
**Post date:** [May 8, 2022, 5:33pm UTC](https://forum.quantasylum.com/t/qa403-asio-driver/681/5 "2022-05-08T17:33:09Z")

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Never mind. Just right click the thd button and you can set the range there.

 ![image](https://canada1.discourse-cdn.com/flex032/uploads/quantasylum/original/2X/9/98be052d9611ec8bc3ae20ff9eade254c8ecdb52.jpeg)  
 ![image](https://canada1.discourse-cdn.com/flex032/uploads/quantasylum/original/2X/c/cc1dad20fcc70bfc43300f811fb479a5a7716b67.jpeg)

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**Author:** ![Moto](https://avatars.discourse-cdn.com/v4/letter/m/2bfe46/32.png) [@Moto](https://forum.quantasylum.com/u/Moto)\
**Post date:** [May 8, 2022, 8:03pm UTC](https://forum.quantasylum.com/t/qa403-asio-driver/681/6 "2022-05-08T20:03:49Z")

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Sorry I posted this in the wrong thread!