Difference between revisions of "RTL-SDR"

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(Created page with "The RTL2832U & R820T is a software defined radio/tuner USB dongle capable of receiving 24 - 1766 MHz radio signals, including DVB-T. You can use it with e.g....")
 
(alternative amixer version)
Line 7: Line 7:
 
  [[apt-get]] install rtl-sdr
 
  [[apt-get]] install rtl-sdr
  
==Listen to FM Radio==
+
==Configure amixer==
 +
===Version 1===
 
Set jack (analog) output:
 
Set jack (analog) output:
 
  [[amixer]] cset numid=3 1
 
  [[amixer]] cset numid=3 1
Line 15: Line 16:
 
Set audio volume:
 
Set audio volume:
 
  [[amixer]] sset "PCM" 90%
 
  [[amixer]] sset "PCM" 90%
 +
 +
===Version 2===
 +
[[amixer]] controls
 +
 +
numid=4,iface=MIXER,name='Master Playback Switch'
 +
numid=3,iface=MIXER,name='Master Playback Volume'
 +
numid=2,iface=MIXER,name='Capture Switch'
 +
numid=1,iface=MIXER,name='Capture Volume'
 +
Enable audio:
 +
[[amixer]] cset numid=4 1
 +
Set volume at 76%
 +
[[amixer]] cset numid=3 50000
 +
Verify:
 +
[[amixer]]
 +
 +
Simple mixer control 'Master',0
 +
  Capabilities: pvolume pswitch pswitch-joined
 +
  Playback channels: Front Left - Front Right
 +
  Limits: Playback 0 - 65536
 +
  Mono:
 +
  Front Left: Playback 50020 [76%] [on]
 +
  Front Right: Playback 50020 [76%] [on]
 +
 +
==Test aplay==
 +
You should hear a kitten miaw...
 +
[[aplay]] /usr/share/scratch/Media/Sounds/Animal/Kitten.wav
 +
 +
==Listen to FM Radio==
  
 
Tune into an FM radio station:
 
Tune into an FM radio station:

Revision as of 10:43, 7 January 2018

The RTL2832U & R820T is a software defined radio/tuner USB dongle capable of receiving 24 - 1766 MHz radio signals, including DVB-T.

You can use it with e.g. a Raspberry Pi or any other Debian based Linux to listen to FM radio.

Installation

Building from sources is not necessary any more...

apt-get install rtl-sdr

Configure amixer

Version 1

Set jack (analog) output:

amixer cset numid=3 1

Set HDMI output:

amixer cset numid=3 2

Set audio volume:

amixer sset "PCM" 90%

Version 2

amixer controls
numid=4,iface=MIXER,name='Master Playback Switch'
numid=3,iface=MIXER,name='Master Playback Volume'
numid=2,iface=MIXER,name='Capture Switch'
numid=1,iface=MIXER,name='Capture Volume'

Enable audio:

amixer cset numid=4 1

Set volume at 76%

amixer cset numid=3 50000

Verify:

amixer
Simple mixer control 'Master',0
 Capabilities: pvolume pswitch pswitch-joined
 Playback channels: Front Left - Front Right
 Limits: Playback 0 - 65536
 Mono:
 Front Left: Playback 50020 [76%] [on]
 Front Right: Playback 50020 [76%] [on]

Test aplay

You should hear a kitten miaw...

aplay /usr/share/scratch/Media/Sounds/Animal/Kitten.wav

Listen to FM Radio

Tune into an FM radio station:

rtl_fm -f 91.7e6 -s 200000 -r 48000 |aplay -r 48000 -f S16_LE

Other applications

External links