ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave

[sjdean]

So far I've not had any problems with Audio, in that PulseAudio works fine for A2DP Bluetooth, Hands Free, local music playback, web browsing, and also rtl_fm.

However both example-1 and example-2 give me the following. Any thoughts?

Im looking to build a CarPC, so hoping I can build up on this. Looking to build a Python front end in KODI and hopefully get a channel scan and tuning setup. Hopefully borrow some bits from your Qt version at some point :-)

First thing though, is getting some audio from the thing!

Simon

pi@master:~/Downloads/dab-cmdline-master/example-1/build $ ./dab_cmdline -M 1 -B "BAND III" -C 12C -P "Radio 4" -G 80 -A default
dab_cmdline, Copyright 2017 J van Katwijk, Lazy Chair ComputingALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.front
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround21
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround21
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround40
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround41
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround50
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround51
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround71
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline
Hostapis: 2
Api 0 is ALSA
Api 1 is OSS
selecting device default
device bcm2835 ALSA: - (hw:0,0) seems available as 0
device bcm2835 ALSA: IEC958/HDMI (hw:0,1) seems available as 1
device sysdefault seems available as 2
device pulse seems available as 3
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
.
.
.
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
Expression 'ret' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1735
Expression 'AlsaOpen( hostApi, parameters, streamDir, &pcm )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1767
device default seems available as 5
Suggested size for outputbuffer = 1280
Segmentation fault

[JvanKatwijk]

It does not look like an output problem. What device did you specify? 2017-07-31 22:27 GMT+02:00 sjdean <notifications@github.com>:

…

So far I've not had any problems with Audio, in that PulseAudio works fine for A2DP Bluetooth, Hands Free, local music playback, web browsing, and also rtl_fm. However both example-1 and example-2 give me the following. Any thoughts? Im looking to build a CarPC, so hoping I can build up on this. Looking to build a Python front end in KODI and hopefully get a channel scan and tuning setup. Hopefully borrow some bits from your Qt version at some point :-) First thing though, is getting some audio from the thing! Simon ***@***.***:~/Downloads/dab-cmdline-master/example-1/build $ ./dab_cmdline -M 1 -B "BAND III" -C 12C -P "Radio 4" -G 80 -A default dab_cmdline, Copyright 2017 J van Katwijk, Lazy Chair ComputingALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.front ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround21 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround21 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround40 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround41 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround50 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround51 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround71 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline Hostapis: 2 Api 0 is ALSA Api 1 is OSS selecting device default device bcm2835 ALSA: - (hw:0,0) seems available as 0 device bcm2835 ALSA: IEC958/HDMI (hw:0,1) seems available as 1 device sysdefault seems available as 2 device pulse seems available as 3 ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave . . . ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave Expression 'ret' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1735 Expression 'AlsaOpen( hostApi, parameters, streamDir, &pcm )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1767 device default seems available as 5 Suggested size for outputbuffer = 1280 Segmentation fault — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#13>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AITzwIxW4fs49jq5dzabv7gpaSMto9Neks5sTjjNgaJpZM4Oo4i5> .

-- Jan van Katwijk +31 (0)15 3698980 +31 (0) 628260355

[sjdean]

Not quite sure how to specify the device. Tried -A default, bcm2835 and pulse with same results. The Qt-DAB works fine and that goes to default.

…

On 31 Jul 2017 9:52 pm, "JvanKatwijk" ***@***.***> wrote: It does not look like an output problem. What device did you specify? 2017-07-31 22:27 GMT+02:00 sjdean ***@***.***>: > So far I've not had any problems with Audio, in that PulseAudio works fine > for A2DP Bluetooth, Hands Free, local music playback, web browsing, and > also rtl_fm. > > However both example-1 and example-2 give me the following. Any thoughts? > > Im looking to build a CarPC, so hoping I can build up on this. Looking to > build a Python front end in KODI and hopefully get a channel scan and > tuning setup. Hopefully borrow some bits from your Qt version at some point > :-) > > First thing though, is getting some audio from the thing! > > Simon > > ***@***.***:~/Downloads/dab-cmdline-master/example-1/build $ ./dab_cmdline > -M 1 -B "BAND III" -C 12C -P "Radio 4" -G 80 -A default > dab_cmdline, Copyright 2017 J van Katwijk, Lazy Chair ComputingALSA lib > pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.front > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.center_lfe > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.surround21 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.surround21 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.surround40 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.surround41 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.surround50 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.surround51 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.surround71 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.phoneline > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > cards.pcm.phoneline > Hostapis: 2 > Api 0 is ALSA > Api 1 is OSS > selecting device default > device bcm2835 ALSA: - (hw:0,0) seems available as 0 > device bcm2835 ALSA: IEC958/HDMI (hw:0,1) seems available as 1 > device sysdefault seems available as 2 > device pulse seems available as 3 > ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave > . > . > . > ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave > Expression 'ret' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1735 > Expression 'AlsaOpen( hostApi, parameters, streamDir, &pcm )' failed in > 'src/hostapi/alsa/pa_linux_alsa.c', line: 1767 > device default seems available as 5 > Suggested size for outputbuffer = 1280 > Segmentation fault > > — > You are receiving this because you are subscribed to this thread. > Reply to this email directly, view it on GitHub > <#13>, or mute the thread > <https://github.com/notifications/unsubscribe-auth/ AITzwIxW4fs49jq5dzabv7gpaSMto9Neks5sTjjNgaJpZM4Oo4i5> > . > -- Jan van Katwijk +31 (0)15 3698980 <+31%2015%20369%208980> +31 (0) 628260355 <+31%206%2028260355> — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#13 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AWmm9COaCnVGIuHFAVAQiIrpwB1RW732ks5sTj6SgaJpZM4Oo4i5> .

[JvanKatwijk]

No I mean in generating the executable. mkdir build cd build cmake .. -DXXX=ON The error you showed was more likely an error with the radio device than with the audio output 2017-08-01 0:10 GMT+02:00 sjdean <notifications@github.com>:

…

Not quite sure how to specify the device. Tried -A default, bcm2835 and pulse with same results. The Qt-DAB works fine and that goes to default. On 31 Jul 2017 9:52 pm, "JvanKatwijk" ***@***.***> wrote: > It does not look like an output problem. What device did you specify? > > > 2017-07-31 22:27 GMT+02:00 sjdean ***@***.***>: > > > So far I've not had any problems with Audio, in that PulseAudio works > fine > > for A2DP Bluetooth, Hands Free, local music playback, web browsing, and > > also rtl_fm. > > > > However both example-1 and example-2 give me the following. Any thoughts? > > > > Im looking to build a CarPC, so hoping I can build up on this. Looking to > > build a Python front end in KODI and hopefully get a channel scan and > > tuning setup. Hopefully borrow some bits from your Qt version at some > point > > :-) > > > > First thing though, is getting some audio from the thing! > > > > Simon > > > > ***@***.***:~/Downloads/dab-cmdline-master/example-1/build $ ./dab_cmdline > > -M 1 -B "BAND III" -C 12C -P "Radio 4" -G 80 -A default > > dab_cmdline, Copyright 2017 J van Katwijk, Lazy Chair ComputingALSA lib > > pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.front > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.center_lfe > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.surround21 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.surround21 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.surround40 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.surround41 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.surround50 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.surround51 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.surround71 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958 > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.phoneline > > ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM > > cards.pcm.phoneline > > Hostapis: 2 > > Api 0 is ALSA > > Api 1 is OSS > > selecting device default > > device bcm2835 ALSA: - (hw:0,0) seems available as 0 > > device bcm2835 ALSA: IEC958/HDMI (hw:0,1) seems available as 1 > > device sysdefault seems available as 2 > > device pulse seems available as 3 > > ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave > > . > > . > > . > > ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave > > Expression 'ret' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: > 1735 > > Expression 'AlsaOpen( hostApi, parameters, streamDir, &pcm )' failed in > > 'src/hostapi/alsa/pa_linux_alsa.c', line: 1767 > > device default seems available as 5 > > Suggested size for outputbuffer = 1280 > > Segmentation fault > > > > — > > You are receiving this because you are subscribed to this thread. > > Reply to this email directly, view it on GitHub > > <#13>, or mute the > thread > > <https://github.com/notifications/unsubscribe-auth/ > AITzwIxW4fs49jq5dzabv7gpaSMto9Neks5sTjjNgaJpZM4Oo4i5> > > . > > > > > > -- > Jan van Katwijk > > > +31 (0)15 3698980 <+31%2015%20369%208980> <+31%2015%20369%208980> > +31 (0) 628260355 <+31%206%2028260355> <+31%206%2028260355> > > — > You are receiving this because you authored the thread. > Reply to this email directly, view it on GitHub > <#13 (comment)- 319192918>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/ AWmm9COaCnVGIuHFAVAQiIrpwB1RW732ks5sTj6SgaJpZM4Oo4i5> > . > — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#13 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AITzwDkVn9zz3cwhoTbHKij22PlKaq_Yks5sTlDogaJpZM4Oo4i5> .

-- Jan van Katwijk +31 (0)15 3698980 +31 (0) 628260355