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Deron deron at pagestream.orgHello Kyle, I had a chance to place with it this weekend, and again last night, and the only additional problems I had: - After 20-30 forced quits, the device will go completely bonkers. Ok, not very technical and hopefully related to the inability to stop it in general. - I have no idea how to make scanning work. Is there something I am missing to force it to continue scanning at the next frequency? Also, when it finds something that breaks squelch, could it dump to shell the frequency using stderr? - I'm using an R820T based device. As I understand it, the offset tuning is unnecessary. Looking at the code, "-E offset" should do just what I want. It disables the offset/90deg shift in rtl_fm, and the library recognizes that is unnecessary and returns -2 or some such. The (very minor) bug is that it reports it as an error that it is unable to set the offset. So what can I do to help find/fix the quit problem? Thanks! Deron Some very basic observations, hope they are useful. Some may be a result of my (lack of) understanding. - Control-c will not stop it. It catches the signal, and reports "Signal caught, exiting!" but does not. I had to kill -9 to stop it... - When first run, I get 30 logged errors of "xhci_hcd 0000:00:14.0: ERROR no room on ep ring". - fm was much better than the old version, but -fmwb was the same. I narrowed it down to -o 4. That alone destroyed all improvements. By using: ./rtl_fm -f 95.1M -M fm -s 170k -A fast -r 32k -l 0 -E deemp - | aplay -r 32k -f S16_LE It was much better. I'll play around more this weekend when I have more time. Overall, very good. Night and day compared to before. Also, cpu usage seemed less. Top reports about 3% vs 6% from before. Deron