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Simeon Miteff simeon.miteff at gmail.comHi Scott On 09/26/12 12:35, Scott Cutler wrote: > Slight correction/clarification to the below: obviously, I am not > calling rtlsdr_set_center_freq when using rtl_tcp.exe. Instead, what I > see is that I can queue up a bunch of tuning calls, but they only kick > in at a very slow rate (1 hz). The effect is similar to when I used the > native libs, where rtlsdr_set_center_freq also took 1 s on the main thread. I experienced the same maximum 1 hz tuning rate with rtl_tcp. A quick look at the code shows a select() call in the command_worker thread with a timeout set to 1s, but that doesn't explain the observed behavior, because, as I understand select(), it should return as soon as the UDP socket has data available (the timeout is used to allow the thread to terminate when rtl_tcp shuts down). Nevertheless, my spidey sense tells me this is the place to look... Regards, Simeon.