Shrill High-Pitched "Smoke Detector" Noise
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Re: Loud shrill sustained sound when changing amp presets
I'm getting the same noise that others have mentioned: that shrill, high-pitched, smoke-detector-style noise that -- at least as far as I've been able to tell -- can be shut off only by powering down the amp. It happens after changing the settings a few times. I've submitted a note to customer support.
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Have you checked to make sure the latest firmware is installed on your spark?
https://help.positivegrid.com/hc/en-us/articles/360038685111-How-To-Update-The-Firmware-on-Spark-
