# "Crackling" from external synth

**URL:** <https://in-thread.sonic-pi.net/t/crackling-from-external-synth/3432>\
**Category:** Support, Help & Resources\
**Created:** [March 10, 2020, 9:52pm UTC](https://in-thread.sonic-pi.net/t/crackling-from-external-synth/3432 "2020-03-10T21:52:49Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![chris.krakou](https://avatars.discourse-cdn.com/v4/letter/c/e5b9ba/32.png) [@chris.krakou](https://in-thread.sonic-pi.net/u/chris.krakou)\
**Post date:** [March 10, 2020, 9:52pm UTC](https://in-thread.sonic-pi.net/t/crackling-from-external-synth/3432/1 "2020-03-10T21:52:49Z")

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Hello everyone

I’m using an external synth as part of my live set, and I have been experiencing an issue that I didn’t experience in version 3.1. The synth started “crackling”, as if there was a timing error, when I was playing it. I send MIDI notes using the `midi` function, and I send it back into Sonic Pi through a `live_audio` command. You can hear it sporadically in my [last performance.](http://in-thread.sonic-pi.net/t/so-i-performed-an-ambient-set/3419)

Does anyone know how to troubleshoot this? I’m running Windows 10 with the latest updates, and I have experienced it on my desktop and my laptop. There doesn’t seem to be a difference in how often it happens in either.