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<p>On Tue, Oct 17, 2017 at 2:34 PM, gnorbury@bondcar.com [op25-dev]<br>
<op25-dev@yahoogroups.com> wrote:<br>
> More command line options are needed:<br>
> -O Loopback:0,0 -V -2 -U<br>
<br>
Thanks, I must have missed that detail with the conversion to rx.py. I<br>
already have -2, but not -V and -U.<br>
<br>
This fixed it. I'm getting audio through the loopback now!<br>
<br>
> Make sure you see an entry in the log file that says "audio device: Loopback:0,0" or whatever alsa device you are using.<br>
<br>
I don't see this line in the output. I also haven't specified a log<br>
file. Is there a default log path? Is this something I should expect<br>
to see in stdout or stderr?<br>
<br>
> In reality you're probably better off making sure op25 plays audio through the default device before you worry about getting it going through the loopback.<br>
<br>
I tried that, but virt-manager isn't even passing the speaker test<br>
audio, so I think that's a lost cause. There is no physical sound<br>
output on this system.<br>
<br>
> As a secondary recommendation, the alsa buffering is considerably better in the version of sockaudio.py found in my github repo. I suggest you upgrade to that version as it has other fixes too.<br>
<br>
It's unclear to me what sockaudio.py does and how I would use it with<br>
darkice. Is there an example of this somewhere?<br>
<br>
I tried your repo, but got an error, so I went back to max:<br>
<br>
tom@stream:~/op25/op25/gr-op25_repeater/apps$ git status<br>
HEAD detached at boatbod/master<br>
Untracked files:<br>
(use "git add <file>..." to include in what will be committed)<br>
<br>
../../../build/<br>
ss911_tacoma.tsv<br>
ss911_tgs.tsv<br>
<br>
nothing added to commit but untracked files present (use "git add" to track)<br>
tom@stream:~/op25/op25/gr-op25_repeater/apps$ ./rx.py --args rtl=0 -N<br>
LNA:42 -f 774081250 -S 1320000 -v 5 -2 -T ss911_tacoma.tsv<br>
linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.005.005-0-unknown<br>
<br>
gr-osmosdr 0.1.1 (0.1.1) gnuradio 3.7.2.1<br>
built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf bladerf rfspace<br>
Using device #0 Realtek RTL2838UHIDIR SN: 00000001<br>
Found Rafael Micro R820T tuner<br>
gain: name: LNA range: start 0 stop 0 step 0<br>
setting gain LNA to 42<br>
supported sample rates 250000-2560000 step 24000<br>
Exact sample rate is: 1320000.047207 Hz<br>
set_center_freq: 774081250<br>
Using Volk machine: sse4_2_64_orc<br>
Traceback (most recent call last):<br>
File "./rx.py", line 671, in <module><br>
tb = p25_rx_block()<br>
File "./rx.py", line 220, in __init__<br>
self.open_usrp()<br>
File "./rx.py", line 606, in open_usrp<br>
self.__set_rx_from_osmosdr()<br>
File "./rx.py", line 542, in __set_rx_from_osmosdr<br>
self.__build_graph(self.src, capture_rate)<br>
File "./rx.py", line 283, in __build_graph<br>
symbol_rate = self.symbol_rate)<br>
File "/home/tom/op25/op25/gr-op25_repeater/apps/p25_demodulator.py",<br>
line 173, in __init__<br>
self.lpf = filter.fft_filter_ccf(decimation, lpf_coeffs)<br>
AttributeError: 'module' object has no attribute 'fft_filter_ccf'<br>
<br>
Tom<br>
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