# Sound Issue on Raspberry Pi and OSC

**URL:** <https://in-thread.sonic-pi.net/t/sound-issue-on-raspberry-pi-and-osc/2360>\
**Category:** Support, Help & Resources\
**Created:** [May 6, 2019, 8:31pm UTC](https://in-thread.sonic-pi.net/t/sound-issue-on-raspberry-pi-and-osc/2360 "2019-05-06T20:31:31Z")\
**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:** [May 6, 2019, 8:31pm UTC](https://in-thread.sonic-pi.net/t/sound-issue-on-raspberry-pi-and-osc/2360/1 "2019-05-06T20:31:31Z")

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Hello Peeps.  
I’m stuck on a tricky issue. I’m using Sonic Pi 3.0.1 on a Raspberry Pi 3 B+. I’ve attached a [USB sound card](https://www.amazon.co.uk/dp/B079126H8C/ref=pe_3187911_189395841_TE_dp_1), and getting sound out of it works fine. I’m also using TouchOSC to control my sound while i code it. I’m never running more than 4 live\_loops at a time, apart from those I run to receive OSC messages.

The issue I’m running into is that when I use TouchOSC to control the code parameters (like `synth :beep, amp: get(:amp1)` ) I get intermittent crackling noises, but they aren’t consistent. I can frantically wiggle 6 sliders on my phone and the sound plays fine, then tune one slider and it sounds like gravel in a blender. I’m accessing the OSC messages by keeping a loop for each element, which syncs to the OSC element ([like i described previously](http://in-thread.sonic-pi.net/t/a-basic-framework-for-using-touchosc-with-sonic-pi/2293)). I’ve tried encapsulating my loops with a `with_timing_guarantees false` block, but that didn’t help either.

I’m not getting this issue on my laptop (Windows 7) or my desktop (windows 10), where i run Sonic Pi 3.1.0. I’ve changed the CPU governor on the pi from ondemand to performance, which alleviated it somewhat. It doesn’t seem to matter whether I’m accessing 4 or 18 TouchOSC elements. When I’m live coding, the CPU monitor never shows more than 25% - 30%.

I’m stumped. The only thing I haven’t tried is getting a better sound card from HiFiBerry, which I’d rather leave out as a last resort. Is there anything I could try looking into, or have i reached the limits of the Pi?