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rtl_fm -f 430175000 -N -r 11000 - | aplay -r 11k -f S
16_LE -t raw -c 1
Failed to stat runtime directory /home/user/.pulse/8ec05df9ed93e7200d2004d40053170b:runtime: Invalid argument
rtl_fm: invalid option -- N
rtl_fm, a simple narrow band FM demodulator for RTL2832 based DVB-T receivers
Use: rtl_fm -f freq [-options] [filename]
-f frequency_to_tune_to [Hz]
use multiple -f for scanning (requires squelch)
ranges supported, -f 118M:137M:25k
[-M modulation (default: fm)]
fm, wbfm, raw, am, usb, lsb
wbfm == -M fm -s 170k -o 4 -A fast -r 32k -l 0 -E deemp
raw mode outputs 2x16 bit IQ pairs
[-s sample_rate (default: 24k)]
[-d device_index (default: 0)]
[-g tuner_gain (default: automatic)]
[-l squelch_level (default: 0/off)]
[-p ppm_error (default: 0)]
[-E enable_option (default: none)]
use multiple -E to enable multiple options
edge: enable lower edge tuning
dc: enable dc blocking filter
deemp: enable de-emphasis filter
direct: enable direct sampling
offset: enable offset tuning
filename ('-' means stdout)
omitting the filename also uses stdout
Experimental options:
[-r resample_rate (default: none / same as -s)]
[-t squelch_delay (default: 10)]
+values will mute/scan, -values will exit
[-F fir_size (default: off)]
enables low-leakage downsample filter
size can be 0 or 9. 0 has bad roll off
[-A std/fast/lut choose atan math (default: std)]
Produces signed 16 bit ints, use Sox or aplay to hear them.
rtl_fm ... | play -t raw -r 24k -es -b 16 -c 1 -V1 -
| aplay -r 24k -f S16_LE -t raw -c 1
-M wbfm | play -r 32k ...
-s 22050 | multimon -t raw /dev/stdin
aplay: playback:2297: read error
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rtl_fm -f 430175000 -N -r 11000 - | lame -r -s 11000 -m m -b 64 - a.mp3
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rtl_fm -f 430175000
~/MyDocs $ sudo rtl_fm -f 430175000 -M -r 11000 - | apla y -r 11k -f S16_LE -t raw -c 1 Failed to stat runtime directory /home/user/.pulse/8ec05df9ed93e7200d2004d40053170b:runtime: Invalid argument Found 1 device(s): 0: Realtek, RTL2841UHIDIR, SN: 00000001 Using device 0: Generic RTL2832U OEM Found Rafael Micro R820T tuner Tuner gain set to automatic. Tuned to 430427000 Hz. Oversampling input by: 42x. Oversampling output by: 1x. Buffer size: 8.13ms Exact sample rate is: 1008000.009613 Hz Sampling at 1008000 S/s. Output at 24000 Hz.