Issue with phat dac/pizero



When i run curl -sS | bash the second time, i get the following message:
Playback open error: -16,Device or resource busy

below my config

thanks for your help

ls /dev/i2c*
ls: cannot access /dev/i2c*: No such file or directory

uname -a
Linux raspberrypi 4.1.18+ #846 Thu Feb 25 14:11:56 GMT 2016 armv6l GNU/Linux

cat /etc/os-*
PRETTY_NAME="Raspbian GNU/Linux 8 (jessie)"
NAME="Raspbian GNU/Linux"
VERSION="8 (jessie)"

Module Size Used by
brcmfmac 192598 0
brcmutil 8869 1 brcmfmac
cfg80211 479279 1 brcmfmac
rfkill 21508 2 cfg80211
snd_soc_hifiberry_dac 2911 1
snd_soc_pcm5102a 2101 1
snd_soc_bcm2708_i2s 7654 2
regmap_mmio 3556 1 snd_soc_bcm2708_i2s
snd_soc_core 167413 3 snd_soc_hifiberry_dac,snd_soc_pcm5102a,snd_soc_bcm2708_i2s
bcm2835_gpiomem 3703 0
bcm2835_rng 2207 0
snd_compress 8865 1 snd_soc_core
snd_pcm_dmaengine 5794 1 snd_soc_core
snd_pcm 92829 4 snd_soc_core,snd_soc_hifiberry_dac,snd_pcm_dmaengine
snd_timer 22164 1 snd_pcm
snd 67534 5 snd_soc_core,snd_timer,snd_pcm,snd_compress
uio_pdrv_genirq 3526 0
uio 10078 1 uio_pdrv_genirq
i2c_dev 6386 0
fuse 86348 1
ipv6 358702 24


It looks to me that the on-board audio is still loaded, have you rebooted?


yes, i have rebooted

the point is i have run the script and check all the parameters.

Have you tested the phat dac/pizero on jessie?


yes, that is the primary environment we support.

the message you are receiving means there is another process that has claimed the hardware, have you installed shairport or similar?


No i have installed squeezeslave only


right, but isn’t squeezeslave running as a server? stop the service if you wish to test the hardware via the cli, otherwise configure your software as required by your application.


you are right, stopping my squeezeslave, the test with curl script is running well

otherwise, i am still having some trouble using phdac with squeezeslave. The sound is pretty bad.
But the point is phdac is well integrated into my pizerro

Thanks a lot


my thought on quality is that it might have to do with the output volume. Try to see if it can be adjusted with the alsamixer?


Ignore the above, I thought there was a layer in software that could affect output volume, but there isn’t.

… how are you connecting it to the amp? and is there a difference in quality when playing back through speaker-test/aplay from the cli and a stream via sqeezeslave?


I have just tried another squeeze client, squeezelite, and it works fine, sound is quite good

thanks again for your concern