# Crackle noise on REAPER (with Focusrite Scarlet)

**URL:** <https://unity.neuraldsp.com/t/crackle-noise-on-reaper-with-focusrite-scarlet/1348>\
**Category:** Support\
**Created:** [April 4, 2020, 2:31pm UTC](https://unity.neuraldsp.com/t/crackle-noise-on-reaper-with-focusrite-scarlet/1348 "2020-04-04T14:31:24Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Gonzalo](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/gonzalo/32/165_2.png) [@Gonzalo](https://unity.neuraldsp.com/u/Gonzalo)\
**Post date:** [April 7, 2020, 3:56pm UTC](https://unity.neuraldsp.com/t/crackle-noise-on-reaper-with-focusrite-scarlet/1348/4 "2020-04-07T15:56:12Z")

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Please try to replicate these settings in Reaper:

Audio system: ASIO (Windows only)  
Sample rate: 44100  
Block Size: 128

A block size of 128 should give you less latency than 256. Be sure to make these changes from the control panel of your interface (“ASIO Configuration…” button if you’re on Windows).

Then go through these guides depending on your operating system: [Windows](https://unity.neuraldsp.com/t/optimizing-your-pc-for-music-production/461) / [macOS](https://unity.neuraldsp.com/t/optimizing-your-macos-system-for-music-production/1249)

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