Posts by fcela
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Is there any advise how to map channels explicitly to the speakers positions in asound.conf?
Something like:
pcm.mychannels51 {
@args.0 SLAVE
@args.SLAVE {
type string
default "surround51"
}
type route
slave {
pcm $SLAVE
channels 6
}
ttable {
0.0= 1
1.4= 1
2.5= 1
3.2= 1
4.1= 1
5.3= 1
}
} thanks. -
Hi,
I have the last development version of Libreelec right now (20190906173149-60568a1 9.80) for s905, but the issue is the same even for the stable one (i have tried stable coreelec and it is the same as well).
When USB Sound card is connected, i could not see all the options related to the audio card, only default (@) and surround21, although when I tried aplay -L I got surround51 as well:
LibreELEC:~ # aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
sysdefault:CARD=AMLGX
AMLGX,
Default Audio Device
hdmi:CARD=AMLGX,DEV=0
AMLGX,
HDMI Audio Output
sysdefault:CARD=Pro
SB X-Fi Surround 5.1 Pro, USB Audio
Default Audio Device
front:CARD=Pro,DEV=0
SB X-Fi Surround 5.1 Pro, USB Audio
Front speakers
surround21:CARD=Pro,DEV=0
SB X-Fi Surround 5.1 Pro, USB Audio
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=Pro,DEV=0
SB X-Fi Surround 5.1 Pro, USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=Pro,DEV=0
SB X-Fi Surround 5.1 Pro, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Pro,DEV=0
SB X-Fi Surround 5.1 Pro, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Pro,DEV=0
SB X-Fi Surround 5.1 Pro, USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Pro,DEV=0
SB X-Fi Surround 5.1 Pro, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Pro,DEV=0
SB X-Fi Surround 5.1 Pro, USB Audio
IEC958 (S/PDIF) Digital Audio Output
surround sound is working when testing using speaker-test:
LibreELEC:~ # speaker-test -c 5 -d surround51:Pro
speaker-test 1.1.9
Playback device is default
Stream parameters are 48000Hz, S16_LE, 5 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 96 to 87381
Period size range from 48 to 43690
Using max buffer size 87380
Periods = 4
was set period_size = 21845
was set buffer_size = 87380
Plug PCM: Route conversion PCM
Transformation table:
0 <- 0
1 <- 1
2 <- 4
3 <- 5
4 <- 2
5 <- 3
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : S16_LE
subformat : STD
channels : 5
rate : 48000
exact rate : 48000 (48000/1)
msbits : 16
buffer_size : 87380
period_size : 21845
period_time : 455104
tstamp_mode : NONE
tstamp_type : MONOTONIC
period_step : 1
avail_min : 21845
period_event : 0
start_threshold : 87380
stop_threshold : 87380
silence_threshold: 0
silence_size : 0
boundary : 1431633920
Slave: Hardware PCM card 1 'SB X-Fi Surround 5.1 Pro' device 0 subdevice 0
Its setup is:
stream : PLAYBACK
access : MMAP_INTERLEAVED
format : S16_LE
subformat : STD
channels : 6
rate : 48000
exact rate : 48000 (48000/1)
msbits : 16
buffer_size : 87380
period_size : 21845
period_time : 455104
tstamp_mode : NONE
tstamp_type : MONOTONIC
period_step : 1
avail_min : 21845
period_event : 0
start_threshold : 87380
stop_threshold : 87380
silence_threshold: 0
silence_size : 0
boundary : 1431633920
appl_ptr : 0
hw_ptr : 0
0 - Front Left
1 - Front Right
2 - Unknown
3 - Unknown
4 - Unknown
Time per period = 11.868019
0 - Front Left
1 - Front Right
2 - Unknown
3 - Unknown
4 - Unknown
Time per period = 13.657329
0 - Front Left
...
althoug there is missing label for 2nd,3rd and 4th speaker (dont know why)
I have tried to add default ALSA card as surround51:Pro to the asound.conf:
LibreELEC:~ # more /storage/.config/asound.conf
pcm.!default {
type plug
slave.pcm {
@func getenv
vars [ ALSAPCM ]
default "surround51:Pro"
channels 6
}
}
After that I can see one more default ALSA card in the Libreelec Audio options, but still no 5.1 surround sound, only left and right speaker plays the music:
When i speaker-test-ed default card, the test is successful as well and all 5 speakers works as expected:
LibreELEC:~ # speaker-test -c 5 -d default
speaker-test 1.1.9
Playback device is default
Stream parameters are 48000Hz, S16_LE, 5 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
...
boundary : 1431633920
appl_ptr : 0
hw_ptr : 0
0 - Front Left
1 - Front Right
2 - Unknown
3 - Unknown
4 - Unknown
Time per period = 11.863601
0 - Front Left
1 - Front Right
2 - Unknown
3 - Unknown
...
I have tried fixed 5.1 speakers config in Libreelec Audio options and upmixing stereo switch as well. Nothing helped.
Is there anything else I can try? How can I achieve to have surround51 option in the Libreelec audio selection box as there is surroun21 option right now.
The card is definitely capable of 5.1 and system, because of successful speaker-test.
Why there is no surround51:CARD=Pro item in the audio options in Librelec (and several other options as well)?
Thanks for any hints.
