Raspberry, SDR, icecast and Noise

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Yeahish
Posts: 1
Joined: Mon Jun 29, 2020 3:48 am

Raspberry, SDR, icecast and Noise

Post by Yeahish » Tue Jun 30, 2020 12:27 am

Hi,

I'm a total n00b in the whole SDR world (even to radio's), I'm fascinated to find out there is a whole world out there around me that I never looked into and love to learn more and more about it.

I'm trying to setup my SDR to stream to icecast. I managed to achieve that using some guides I found online and it seems to be working fine.

I do have on particular issue that I can't seem to figure out. My streams all have loud white background noise, on Noaa it's not that bad but once I tune into local frequencies like EMS etc. the noise is so overwhelming, I can't hear anything.

The noise happens regardless whether I stream to icecast or whether I play it directly on my computer.

I'm using an Raspberry PI 3+ with RTL_FM piped to either aplay for local audio or lame and ezstream for icecast streaming.

The exact command I run is

Code: Select all

rtl_fm -d 0 -f 162.55m | lame -r -s 24 -m m -b 64 --cbr - - | ezstream -c /etc/ezstream.d/ezstream
and the EZstream contains this code

Code: Select all

<ezstream>
    <url>http://localhost:8000/first</url>
    <sourcepassword>...</sourcepassword>
    <format>MP3</format>
    <filename>stdin</filename>
    <stream_once>1</stream_once>
    <svrinfoname>....</svrinfoname>
    <svrinfourl>...</svrinfourl>
    <svrinfogenre>...</svrinfogenre>
    <svrinfodescription>...</svrinfodescription>
    <svrinfobitrate>64</svrinfobitrate>
    <svrinfochannels>1</svrinfochannels>
    <svrinfosamplerate>44100</svrinfosamplerate>
    <svrinfopublic>0</svrinfopublic>
</ezstream>

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