kopia lustrzana https://github.com/ha7ilm/rpitx-app-note
Update README.md
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README.md
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**Table of contents**
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* [Using a Raspberry Pi as remote software defined radio peripheral from GNU adio](#using-a-raspberry-pi-as-remote-software-defined-radio-peripheral-from-gnu-radio)
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* [NFM modulator example in GNU Radio](#nfm-modulator-example-in-gnu-radio)
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* [Using rpitx with csdr to modulate streaming input](#using-rpitx-with-csdr-to-modulate-streaming-input)
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* [Modulate from raw audio file](#modulate-from-raw-audio-file)
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* [Modulate from microphone input source](#modulate-from-microphone-input-source)
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* [Modulate from audio streamed from remote computer](#modulate-from-audio-streamed-from-remote-computer)
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* [Using ADPCM codec to decrease network usage while streaming](#using-adpcm-codec-to-decrease-network-usage-while-streaming)
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<br /><br />
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![Warning](/images/lpf-warning.png?raw=true)
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@ -25,7 +30,7 @@ On the Raspberry Pi, execute:
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* This will listen on TCP port 8011 for the I/Q signal.
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* The center frequency of the transmitter will be 28400 kHz.
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**NFM modulator example in GNU Radio**
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### NFM modulator example in GNU Radio
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On the PC, open GNU Radio Companion, and load the flow graph in this repo at `gnuradio/nfm-rpitx`.
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@ -111,7 +116,7 @@ You will have to get the correct ALSA device ID via `arecord -L`, it will be som
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#WFM:
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arecord -c1 -r48000 -D plughw:CARD=Device,DEV=0 -fS16_LE - | csdr convert_i16_f | csdr gain_ff 70000 | csdr convert_f_samplerf 20833 | sudo rpitx -i- -m RF -f 28400
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### Modulate audio streamed from remote computer
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### Modulate from audio streamed from remote computer
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First, start the transmitter:
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You should replace `raspberrypi.local` with the IP address of the Raspberry Pi (unless avahi config is the default).
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### Using ADPCM codec to decrease network usage while streaming:**
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### Using ADPCM codec to decrease network usage while streaming
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Let's see an example for this on the NFM modulator. Execute on the Raspberry Pi:
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