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DOCS: Add option for line-in #819

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DOCS: Add option for line-in #819

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5c455ad
Add option for line-in
abelmatser Mar 1, 2021
7d7baac
Update player_setup.md
abelmatser May 8, 2021
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39 changes: 38 additions & 1 deletion doc/player_setup.md
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Expand Up @@ -224,6 +224,43 @@ source = process:///usr/bin/mpv?name=Webradio&sampleformat=48000:16:2&params=htt

Audio captured from line-in can be redirected to the snapserver's pipe, e.g. by using:

#### Sox

1. Install sox: `sudo apt update && sudo apt install sox`
2. Add fifo input to /etc/snapserver.conf: `stream = pipe:///tmp/snapfifo?name=soxfifo&sampleformat=$RATE:$BITS:$CHANNELS`
3. Test configuration with: `sox -V2 -q -r $RATE -b $BITS -c $CHANNELS -t alsa $DEVICE -t raw -L -r $RATE -b $BITS -c $CHANNELS - silence 1 0.2 0.05% -1 0.2 0.05% > /tmp/soxfifo

Replace $RATE with sample rate (e.g. 44100), $DEVICE with alsa device - find with `arecord -l` (e.g. hw:1,0), $BITS with bits (e.g. 16), $CHANNELS with the amount of channels - for line in use 2, for your microphone jack use 1. The default would need you to put `stream = pipe:///tmp/snapfifo?name=soxfifo&sampleformat=44100:16:2` in /etc/snapserver.conf and run the following command:

```
sox -V2 -q -r 44100 -b 16 -c 2 -t alsa hw:1,0 -t raw -L -r 44100 -b 16 -c 2 - silence 1 0.2 0.05% -1 0.2 0.05% > /tmp/soxfifo
```
When this works, create a service in /etc/systemd/system/sox.service:

```
[Unit]
Description=Sox stream from line in/microphone input to /tmp/soxfifo to be picked up by Snapcast
After=sound.target

[Service]
Type=normal
User=$USER
ExecStart=/usr/bin/sox -V2 -q -r $RATE -b $BITS -c $CHANNELS -t alsa $DEVICE -t raw -L -r $RATE -b $BITS -c $CHANNELS - silence 1 0.2 0.05% -1 0.2 0.05%
Restart=always
StandardOutput=file:/tmp/soxfifo

[Install]
WantedBy=multi-user.target
```

Replace $USER with the username whom can run the preceding command succesfully. Finally run:
```
sudo systemctl daemon-reload
sudo systemctl enable --now sox
sudo systemctl status sox
```
to start the service, automatically start it at boot and check if it is working.

#### cpiped

[cpipe](https://github.com/b-fitzpatrick/cpiped)
Expand All @@ -238,4 +275,4 @@ Use `--aout afile` and `--audiofile-file` to pipe VLC's audio output to the snap

```sh
vlc --no-video --aout afile --audiofile-file /tmp/snapfifo
```
```