Please note that you all have the same symptom
, which can be caused by a variety of quite different issues, hence troubleshooting this is done best in a separate thread for everyone having this problem, or in other words, people chiming in with "I have the same issue" is usually making troubleshooting pretty hard and you might not get the help you were hoping for.
Audio breaking up can be caused for example by
- USB bottleneck issues as indicated by Tech_Support
No idea how to check this this right now. Maybe when you checked all of the stuff below without any findings, that's what's left and the most likely culprit.
- a variety of CPU related issues, like a simple "not enough CPU power", thermal throttling (cooling problems), power saving issues (core parking, EIST etc. settings in the BIOS causing CPU clock reduction).
Check/clean your fans, use CPU-Z or a similar tool to check if core clock and multiplier remain constant, if not try to turn off EIST/C1E and whatnot in the BIOS. This is often not possible on laptop BIOSses. The only way then and also related to that:
- Windows power scheme is not on "high performance"
- A rogue process or service kicks in and steals CPU power from radio processing
Can be checked quite easy by monitoring the running processes and their CPU load in Task Manager. Also check the Performance tab is something is pegging one core.
- A driver causing high DPC latencies, stopping processing of anything else
Run the DPC latency checker http://www.thesycon.de/deu/latency_check.shtml
while running your SDR software and if it indicates (very high red spikes) possible interruptions coinciding with dropouts/stuttering you can use LatencyMon http://www.resplendence.com/latencymon
to find the offending device/driver. In particular on laptops it's often the WLAN adapter causing dropouts, so turning that (and your card reader, webcam...) off (ideally in Device Manager) should be the first thing you try.