Dream AM/DRM Receiver / Discussion / General Discussion: [Need help]Dream xHE-AAC support for openwebrx-plus

dennis - 2025-03-08

Hi guys,

I use Openwebrx plus(https://hub.docker.com/r/slechev/openwebrxplus) to run SDR service, and the built-in DRM only support AAC decoding, but not support xHE-AAC decoding.

So I try to re-compile the dream from souce code to make it support xHE-AAC,
and the make is ok,
but if run the dream, it's still get error output. details information as below.

1. Basic informaion:
Hardware: SDRPlay RSP1, a SDR(softwave define radio) dongle.
System: Ubuntu 20.04
Docker image: https://hub.docker.com/r/slechev/openwebrxplus ,which is also based on ubuntu 20.04 or similar.

**Decoding good: **
The openwebrx could decoding DRM program(such as 17770kHz and 21530kHz) which are none-xHE.AAC.

** Decoding error: **
couldn't decoding DRM program(such as 13825kHz) which is xHE.AAC.

the install guidance of DRM support in openwebrx:
https://github.com/jketterl/openwebrx/wiki/Manual-Package-installation-(including-digital-voice)

related post that the openwebrx only support none-xHE-AAC:
https://groups.io/g/openwebrx/topic/try_to_make_the_drm_xhe_aac/109553475

2. Try to re-compile the dream, and get error when run the dream.

14-line fix for xHE-AAC decoding
https://sourceforge.net/p/drm/discussion/general/thread/01c6e64c3b/?page=1

In the above posts, it says there're solution to make xHE-AAC decoding.

(1)I clone the source code(https://sourceforge.net/p/drm/code/HEAD/tree/branches/dream-rafa/ ) which is mentioned in above thread "14-line fix for xHE-AAC decoding",
and recompile the dream, but still not working.

and the error log of openwebrx is:

Got FAAD2 library Got FAAC library construct CSoundInPulse pa_c_sync failed, error -1 pa_init pa_context_connect failed CSoundPulse::Enumerate(): pa_init failed initplay 48000 38400 0

and a normal log of openwebrx for drm decoding(none-xHE-AAC) is:

Got FAAD2 library Got FAAC library Got Opus library initrec 48000 1280 1 initplay 48000 38400 0

and if I run the dream directly, the output is:

./dream Got FAAD2 library Got FAAC library construct CSoundInPulse pa_c_sync failed, error -1 pa_init pa_context_connect failed CSoundPulse::Enumerate(): pa_init failed stoprec pa_c_sync failed, error -1 pa_init pa_context_connect failed CSoundPulse::Enumerate(): pa_init failed pa_c_sync failed, error -1 pa_init pa_context_connect failed CSoundPulse::Enumerate(): pa_init failed ~CSoundOutPulse stopplay ~CSoundPulse initplay 48000 38400 0 CSoundOutPulse::Init_HW() pa_c_sync failed, error -1 pa_init pa_context_connect failed CSoundOutPulse::Init_HW pa_init failed

and in the docker container, the pulseaudio wasn't installed. and the none-xHE.AAC DRM decoding was also normal/good without the installation of pulseaudio.

pulseaudio --version bash: pulseaudio: command not found

I'm not good at this,maybe somebody can help me to fix the above problem related to the pulse audio. thanks.

Last edit: dennis 2025-07-20
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Allen - 2025-10-08

Hello
I come from China.
I also encountered the same problem
Looking for a solution

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Allen - 2025-10-08

root@Raspberrypi5:~# dream
Got FAAD2 library
Got FAAC library
pa_c_sync failed, error -1
pa_init pa_context_connect failed
CSoundPulse::Enumerate(): pa_init failed
stoprec
pa_c_sync failed, error -1
pa_init pa_context_connect failed
CSoundPulse::Enumerate(): pa_init failed
pa_c_sync failed, error -1
pa_init pa_context_connect failed
CSoundPulse::Enumerate(): pa_init failed
~CSoundOutPulse
stopplay
~CSoundPulse
initplay 48000 38400 0
CSoundOutPulse::Init_HW()
pa_c_sync failed, error -1
pa_init pa_context_connect failed
CSoundOutPulse::Init_HW pa_init failed
^C
root@Raspberrypi5:~# pulseaudio --check
pulseaudio -k
pulseaudio --start
E: [pulseaudio] main.c: Failed to kill daemon: No such process
W: [pulseaudio] main.c: This program is not intended to be run as root (unless - -system is specified).
root@Raspberrypi5:~# dream
Got FAAD2 library
Got FAAC library
stoprec
stoprec
~CSoundInPulse
stoprec
~CSoundPulse
~CSoundOutPulse
stopplay
~CSoundPulse
initplay 48000 38400 0
CSoundOutPulse::Init_HW()
pulseaudio output device 'auto_null', init done
initrec 48000 1280 1
CSoundInPulse::Init_HW()
pulseaudio input device 'auto_null.monitor', init done
^C
root@Raspberrypi5:~# ps aux|grep -i dream
root 1298 0.0 0.0 6240 1632 pts/0 S+ 22:32 0:00 grep -i dream
root@Raspberrypi5:~# ./dream -f drm-bbc.rec
-bash: ./dream: No such file or directory
root@Raspberrypi5:~# cd /root/apps/dream-2.2-v1418
root@Raspberrypi5:~/apps/dream-2.2-v1418# ./dream -f drm-bbc.rec
Got FAAD2 library
Got FAAC library
~CSoundOutPulse
stopplay
~CSoundPulse
initplay 48000 38400 0
CSoundOutPulse::Init_HW()
pulseaudio output device 'auto_null', init done
DecOpen AAC+SBR+SBR+SBR-CRC
DecOpen sample rate 48000
initplay 48000 38400 0
CSoundOutPulse::close_HW()
CSoundOutPulse::Init_HW()
pulseaudio output device 'auto_null', init done
zero output channels: 0
zero output channels: 0
The provided output buffer is too small.
DecOpen AAC+SBR+SBR+SBR-CRC
DecOpen sample rate 48000
zero output channels: 0
zero output channels: 0
The provided output buffer is too small.
*** playback UNDERFLOW
*** playback UNDERFLOW
*** playback UNDERFLOW
other error 4005
other error 4005
other error 4005
*** playback UNDERFLOW
*** playback UNDERFLOW
*** playback UNDERFLOW
*** playback UNDERFLOW
^C
root@Raspberrypi5:~/apps/dream-2.2-v1418# ./dream -f drm-bbc.rec --buffer-size=4 096
./dream: Unknown option '--buffer-size=4096' -- use '--help' for help
root@Raspberrypi5:~/apps/dream-2.2-v1418# ./dream -f drm-bbc.rec
Got FAAD2 library
Got FAAC library
~CSoundOutPulse
stopplay
~CSoundPulse
initplay 48000 38400 0
CSoundOutPulse::Init_HW()
pulseaudio output device 'auto_null', init done
DecOpen AAC+SBR+SBR+SBR-CRC
DecOpen sample rate 48000
initplay 48000 38400 0
CSoundOutPulse::close_HW()
CSoundOutPulse::Init_HW()
pulseaudio output device 'auto_null', init done
zero output channels: 0
zero output channels: 0
The provided output buffer is too small.
DecOpen AAC+SBR+SBR+SBR-CRC
DecOpen sample rate 48000
zero output channels: 0
zero output channels: 0
The provided output buffer is too small.
*** playback UNDERFLOW
*** playback UNDERFLOW
*** playback UNDERFLOW
other error 4005
other error 4005
other error 4005
*** playback UNDERFLOW
*** playback UNDERFLOW
*** playback UNDERFLOW
*** playback UNDERFLOW
^C
root@Raspberrypi5:~/apps/dream-2.2-v1418# ./dream -f drm-bbc.rec --sample-rate=4 4100
./dream: Unknown option '--sample-rate=44100' -- use '--help' for help
root@Raspberrypi5:~/apps/dream-2.2-v1418# sudo apt --only-upgrade install openwe brx
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
openwebrx is already the newest version (1.2.93).
0 upgraded, 0 newly installed, 0 to remove and 42 not upgraded.
root@Raspberrypi5:~/apps/dream-2.2-v1418# journalctl -u pulseaudio --no-pager | grep -i underflow
root@Raspberrypi5:~/apps/dream-2.2-v1418# ^C
root@Raspberrypi5:~/apps/dream-2.2-v1418# dream
Got FAAD2 library
Got FAAC library
stoprec
stoprec
~CSoundInPulse
stoprec
~CSoundPulse
~CSoundOutPulse
stopplay
~CSoundPulse
initplay 48000 38400 0
CSoundOutPulse::Init_HW()
pulseaudio output device 'auto_null', init done
initrec 48000 1280 1
CSoundInPulse::Init_HW()
pulseaudio input device 'auto_null.monitor', init done
^C
root@Raspberrypi5:~/apps/dream-2.2-v1418# dream -I pulse -O pulse
Got FAAD2 library
Got FAAC library
initplay 48000 38400 0
CSoundOutPulse::Init_HW()
CSoundOutPulse::Init_HW pa_stream_connect_playback failed
pulseaudio output device 'pulse', init done
^C
root@Raspberrypi5:~/apps/dream-2.2-v1418# systemctl --user restart pulseaudio
root@Raspberrypi5:~/apps/dream-2.2-v1418# dream -I pulse -O alsa
Got FAAD2 library
Got FAAC library
initplay 48000 38400 0
CSoundOutPulse::Init_HW()
CSoundOutPulse::Init_HW pa_stream_connect_playback failed
pulseaudio output device 'alsa', init done
^C
root@Raspberrypi5:~/apps/dream-2.2-v1418# pulseaudio --check
pulseaudio -k
pulseaudio --start
W: [pulseaudio] main.c: This program is not intended to be run as root (unless - -system is specified).
root@Raspberrypi5:~/apps/dream-2.2-v1418# dream
Got FAAD2 library
Got FAAC library
stoprec
stoprec
~CSoundInPulse
stoprec
~CSoundPulse
~CSoundOutPulse
stopplay
~CSoundPulse
initplay 48000 38400 0
CSoundOutPulse::Init_HW()
pulseaudio output device 'auto_null', init done
initrec 48000 1280 1
CSoundInPulse::Init_HW()
pulseaudio input device 'auto_null.monitor', init done

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Allen - 2025-10-28

微信图片_20251027184259_991_4373.jpg

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Allen - 2025-10-28

Dream works normally in OpenWebrx

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Allen - 2025-11-05

https://github.com/wwek/dream/issues

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[Need help]Dream xHE-AAC support for openwebrx-plus

A software radio for AM and Digital Radio Mondiale (DRM)

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[Need help]Dream xHE-AAC support for openwebrx-plus

[Need help]Dream xHE-AAC support for openwebrx-plus

A software radio for AM and Digital Radio Mondiale (DRM)

Forums

Help

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[Need help]Dream xHE-AAC support for openwebrx-plus