<html><body><div style="color:; background-color:; font-family:arial, helvetica, sans-serif;font-size:13px"><div><span>With rtl_fm, I get a tiny burst of audio about once a minute.</span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: arial,helvetica,sans-serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: arial,helvetica,sans-serif; background-color: transparent; font-style: normal;"><span>My dongle is a vendor ID 0x0bda, product ID 0x2838 from http://www.amazon.com/gp/browse.html?ie=UTF8&marketplaceID=ATVPDKIKX0DER&me=A2JO7YP9I9Y3D6</span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: arial,helvetica,sans-serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: arial,helvetica,sans-serif; background-color: transparent;
font-style: normal;"><span>I did:<br>rtl_fm -f 88500000 - | play -t raw -r 24k -e signed-integer -b 16 -c 1 -V1 -<br><br>I got:<br>Found 1 device(s):<br> 0: Realtek, RTL2838UHIDIR, SN: 00000013<br><br>Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle<br>Found Rafael Micro R820T tuner<br><br>-: (raw)<br><br> Encoding: Signed PCM<br> Channels: 1 @ 16-bit<br>Samplerate: 24000Hz<br>Replaygain: off<br> Duration: unknown<br><br>In:0.00% 00:00:00.00 [00:00:00.00] Out:0 [ | ] Clip:0<br>Oversampling input by: 42x.<br>Oversampling output by: 1x.<br>Buffer size: 8.13ms<br>Tuned to 88752000 Hz.<br>Sampling at 1008000 Hz.<br>Output at 24000 Hz.<br>Exact sample rate is: 1008000.009613 Hz<br>Tuner gain set to automatic.<br>In:0.00% 00:00:00.68 [00:00:00.00] Out:16.4k [ =====|=====
] Clip:0<br>^CSignal caught, exiting!<br><br></span></div><div>The dongle works if I boot into Windows, but in OpenBSD I can't get anything out of it. I'm still trying to get dependencies for Gnuradio together. The only odd thing is that being OpenBSD, there's no -lrt when I link. Those functions are built into something else so I compile without the -lrt. There isn't an -lrt library.<br><br>I've tried writing little scripts to run it so I do it consistently. My wide FM one:<br><br>#!/bin/sh<br>rtl_fm -W -l 0 -f 88500000 - | play -t raw -r 32000 -e signed-integer -b 16 -c 1 -V4 -<br><br>Narrow:<br>#!/bin/sh<br>rtl_fm -N -l 0 -f 162550000 - | play -t raw -r 32k -e signed-integer -b 16 -c 1 -V4 -<br><br>I've played with various options. If I use -R it runs for a long time with lots of data by Sox's meter, but I don't hear anything. If I pipe it to a file (without -R) the
file is very small and grows slowly, not what I would expect from audio. I just grabbed a fresh copy by git yesterday but it works about the same.<br><br>A fresh run:<br>freebie# rtl_fm -N -f 162550000 - | play -t raw -r 32k -e signed-integer -b 16 -c 1 -V 4 -<br>Found 1 device(s):<br>play: SoX v14.3.2<br> 0: Realtek, RTL2838UHIDIR, SN: 00000013<br><br>Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle<br>Found Rafael Micro R820T tuner<br>Oversampling input by: 42x.<br>Oversampling output by: 1x.<br>Buffer size: 8.13ms<br>Tuned to 162802000 Hz.<br>Sampling at 1008000 Hz.<br>Output at 24000 Hz.<br>Exact sample rate is: 1008000.009613 Hz<br>Tuner gain set to automatic.<br>Signal caught, exiting!<br><br>I don't have much idea what's going on, but I'm tempted to try opening it from a pipe (in C) to see if I can capture anything more.<br><br> Alan<br></div><div>-----<br>Radio Astronomy - the ultimate DX<br></div></div></body></html>