b-fitzpatrick / cpiped Goto Github PK

I tried to get single channel input to work in my fork, but I could not get it to work.

abelmatser/cpiped

The mono audio input still sounds jittery. I heard this same jittery sound when capturing mono audio as stereo (arecord without -c 1 option) and forwarding this to snapcast.

What works:
sudo arecord -r 44100 -f S16_LE -D hw:1,0 > /tmp/snapfifo
What does not work:
sudo ./cpiped -c 1 -d hw:1,0 /tmp/snapfifo

This program is exactly what I need to get my whole house audio setup going. One catch I'm having is that even with silence the buffer keeps writing to my fifo file. Have tried setting the silence threshold to max and no different. This may not be an issue for others but I'm using forked-daapd to automatically play when a fifo starts and using cpiped and Shairport to feed it.

I've tried different sound cards and different paths in arecord, no help.

Hope someone can help!

Thanks for this, found this in a raspberrypi forum, and successfully set it up with forked-daapd. However, the music tends to skip every 10 seconds or so, did you encounter this? And how did you fix it?

Also, I am unable to set the buffer above 0.5, only below down to about .095 works

I wanted to start a custom script with a parameter when cpiped detects a sound but there is a check whether this is a valid file. But since I have a space with the parameters, that is not a valid file. Removing the check from the source code works.

I am not good at writing C or I would have sent a fix. Sorry

At the end I get

Invalid start command: /root/cpiped-snapcast-ctrl/playing.py chromecast

but actually executing it works fine.

Hello again - I am trying to debug this but figured I could ask for your help again after your assistance last week.

Looking further into my skipping issue, it turns out it was happening every so often because the output is slightly slower playback than the input, causing overruns from time to time. The slow playback is barely noticeable, but it's there. If I play a non-FIFO file through forked-daapd, the playback is correct so I'm thinking it must be something with the FIFO.

Any ideas on how to resolve this? I tried switching up the "val =" bitrate from 44100 to 48000, since the input through USB is coming in at 48kHz according to

`cat /proc/asound/card0/pcm0p/sub0/hw_params

No worries if not, just kind of stuck here. Really appreciate any help you can provide.

We would like to package this for Alpine Linux. Would it be possible to create a release tag?

Hi all,

I've found cpiped as a working solution to stream from a vinyl record player to a Homepod using a raspberry pi.

I've configured forked-daapd and wokrs great (streaming from spotify and other sources), but can't find a way to install cpiped and make it work.

My setup:

1. Behringer UFO202 USB audio adapter (which connects the vinyl record player to te RPI)
2. RPI 3 b+ with standard setup of forked-daapd

Can anyone give me a clue of how to set up cpiped, I'm newbie with RPI and Linux command line.

Thanks in advance!

Hello!

Thanks for making this :)

Can i have some help?

if i do
/usr/local/bin/cpiped -D /tmp/snapfifo
it works for a few hours, but if i use the init.d script, it just says

systemd[1]: Starting LSB: Captures sound card audio and outputs to a pipe...
cpiped[7706]: Starting up.
systemd[1]: Started LSB: Captures sound card audio and outputs to a pipe.
cpiped[7700]: ALSA lib pcm_dsnoop.c:618:(snd_pcm_dsnoop_open) unable to open slave
cpiped[7707]: Unable to open pcm device: No such file or directory
cpiped[7707]: Stopping due to error.

this is the cpiped config file

PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Audio capture to a pipe" # Introduce a short description here
NAME=cpiped                    # Introduce the short server's name here
DAEMON=/usr/local/bin/cpiped   # Introduce the server's location here
DAEMON_ARGS="-D /tmp/snapfifo" # Edit this!
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

I have an unfortunate issue when using cpiped to capture music from an aux device and pipe it into snapcast to play on multiple stereos. Suddenly all of the stereos will start blasting an extremely loud static noise at an inhuman volume. Its quite terrifying! This happens about once a day, but seems to be occurring with more frequency. I believe the problem is linked to cpiped because the system returns to normal playback when I restart the cpiped daemon, but not if I restart the snapcast daemons. Cpiped is running on a raspberry pi with Raspbian Buster.

Anybody else experienced this behavior?

I got regular "Filling buffer" messages when reading from a usb audio device (Behringer UFO202 & RPI 3 model B), even with nothing reading from the named pipe.

FWIW, these seem to have disappeared since changing the sample rate from 44100 to 48000 in cpiped.c and recompiling (also setting matching minimum and maximum buffer limits).

In Python 3.7

ALSA lib pcm_dsnoop.c:638:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2660:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2660:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2660:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_a52.c:823:(_snd_pcm_a52_open) a52 is only for playback
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
ALSA lib pcm_dmix.c:1075:(snd_pcm_dmix_open) unable to open slave

How to solve this poroblem

I'm getting distortion with Cpiped feeding into Owntone which I assume are buffering problems. If I use arecord I get overrun messages ("overrun!!! (at least 6935.229 ms long)") but it then works fine. So I assume that my buffer overrun may be too much for cpiped max buffer of 5s. Is it possible to extend the buffer size in Cpiped? I'm happy to try and rebuild it myself (if a new first for me) if you can point me to which part of the code needs to be altered.

with thanks

Somehow on my setup I can't use the name of cards. When I want to use alsamixer I have to use alsamixer -c 1. None of the names that aplay -l gives me are "accepted" by cpiped.

I always get

Starting up.
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM Device
Unable to open pcm device: No such file or directory

If there was a way to use the card number that would be great.

Hello,

I'm trying to complie in my ubuntu box 32 bits but has this errors:

/tmp/ccnkWhD5.o: En la función myterm': /home/rafa/cpiped/cpiped.c:54: referencia a snd_pcm_drain' sin definir
/home/rafa/cpiped/cpiped.c:55: referencia a snd_pcm_close' sin definir /tmp/ccnkWhD5.o: En la función main':
/home/rafa/cpiped/cpiped.c:233: referencia a snd_pcm_open' sin definir /home/rafa/cpiped/cpiped.c:235: referencia a snd_strerror' sin definir
/home/rafa/cpiped/cpiped.c:238: referencia a snd_pcm_hw_params_sizeof' sin definir /home/rafa/cpiped/cpiped.c:238: referencia a snd_pcm_hw_params_sizeof' sin definir
/home/rafa/cpiped/cpiped.c:239: referencia a snd_pcm_hw_params_any' sin definir /home/rafa/cpiped/cpiped.c:240: referencia a snd_pcm_hw_params_set_access' sin definir
/home/rafa/cpiped/cpiped.c:241: referencia a snd_pcm_hw_params_set_format' sin definir /home/rafa/cpiped/cpiped.c:242: referencia a snd_pcm_hw_params_set_channels' sin definir
/home/rafa/cpiped/cpiped.c:243: referencia a snd_pcm_hw_params_set_rate_near' sin definir /home/rafa/cpiped/cpiped.c:247: referencia a snd_pcm_hw_params_set_period_size_near' sin definir
/home/rafa/cpiped/cpiped.c:250: referencia a snd_pcm_hw_params' sin definir /home/rafa/cpiped/cpiped.c:252: referencia a snd_strerror' sin definir
/home/rafa/cpiped/cpiped.c:257: referencia a snd_pcm_hw_params_get_period_time' sin definir /home/rafa/cpiped/cpiped.c:260: referencia a snd_pcm_hw_params_get_period_size' sin definir
/home/rafa/cpiped/cpiped.c:300: referencia a snd_pcm_readi' sin definir /home/rafa/cpiped/cpiped.c:316: referencia a sqrt' sin definir
/home/rafa/cpiped/cpiped.c:303: referencia a snd_pcm_prepare' sin definir /home/rafa/cpiped/cpiped.c:307: referencia a snd_strerror' sin definir

Sorry, it's in spanish. I have libasound2-dev installed, but I thing I'm missing any other package. Can you help me? Thanks in advance.

I’ve successfully setup cpiped and owntone on a raspberry pi zero w to play audio from my record player (through behringer ufo202) to my HomePod. Everything is working fine except that the audio skips forward once every ten seconds or so. I have tried to set the buffer parameter (-b) to 4 or 5 but this doesn’t solve the issue, this is my execution script:

[Unit]
Description=cpiped
After=sound.target

[Service]
Type=forking
KillMode=none
User=pi
ExecStart=/home/pi/bin/cpiped -d "hw:1,0" -b 5 -s /home/pi/bin/soundDetect.sh -e /home/p>ExecStop=/usr/bin/killall -9 cpiped
WorkingDirectory=/home/pi

[Install]
WantedBy=multi-user.target

Sorry for that dump question but how can i install cpiped?

i did a "git clone" and then "make", but "make install" did not work for me.
Maybe you can give me a short explanation.
Thank you in advance.