Success! following Charlies guidance for Raspbian-Buster on my old Pi2B.
Had to manually drive the kernel build from the command line, but it worked fine.
It was necessary to edit my "old" asound.conf from a prior Raspbian build to change "hw:0,0" to "hw:0,1" for this to work with mplayer. Pi is running Charlies ACDf_v3 filters with LR4 crossovers set at 200hz and 3000hz on a pair of 3-way Klipsch KSF10.5 speakers driven by an Onkyo TX-SR605 7.1 surround sound receiver through HDMI from the Pi. CPU utilization runs about 16% streaming RadioParadise main mix at FLAC. I am using ethernet cable and no wifi or bluetooth installed on this hardware.
Shout out to jrubins for his Instructable, Charlie for his plugins and instructions and all the others who post on this topic!
Had to manually drive the kernel build from the command line, but it worked fine.
It was necessary to edit my "old" asound.conf from a prior Raspbian build to change "hw:0,0" to "hw:0,1" for this to work with mplayer. Pi is running Charlies ACDf_v3 filters with LR4 crossovers set at 200hz and 3000hz on a pair of 3-way Klipsch KSF10.5 speakers driven by an Onkyo TX-SR605 7.1 surround sound receiver through HDMI from the Pi. CPU utilization runs about 16% streaming RadioParadise main mix at FLAC. I am using ethernet cable and no wifi or bluetooth installed on this hardware.
Shout out to jrubins for his Instructable, Charlie for his plugins and instructions and all the others who post on this topic!
After upgrade to latest Raspbian Buster
FYI
After upgrading to latest Raspbian Buster ended up re-doing the kernel mod to restore the audio functionality. Had to set raspi-config for HDMI only and edited the config.txt to comment out hdmi_force_hotplug=1 and add force_hdmi_open=1 and uncomment hdmi_drive=2 and uncomment dtoverlay=vc4-fkms-v3d and uncomment start_x=0. Edited asound.conf to set hw:0,1 and edited mplayer.conf to add flag vo=null so that it would not bomb out when playing audio only m4a files.
Helpful Tip: force_hdmi_open=1 keeps the carrier signal alive to the av receiver so its relay doesn't "click" between tracks in a playlist when running mplayer from command line.
$ grep Revision /proc/cpuinfo
Gives following:
Revision : a21041
Which is apparently Model B2 with 1G
$ aplay -D hw:0,1 --dump-hw-params /dev/zero
Gives following:
Same as reported in earlier post by 'skyunlimited' except both 16 bits and 24 bits are supported and the Period_Bytes are now 262144.
Hope this helps anyone else out there running into problems with keeping their audio operational after upgrading the Pi OS.
FYI
After upgrading to latest Raspbian Buster ended up re-doing the kernel mod to restore the audio functionality. Had to set raspi-config for HDMI only and edited the config.txt to comment out hdmi_force_hotplug=1 and add force_hdmi_open=1 and uncomment hdmi_drive=2 and uncomment dtoverlay=vc4-fkms-v3d and uncomment start_x=0. Edited asound.conf to set hw:0,1 and edited mplayer.conf to add flag vo=null so that it would not bomb out when playing audio only m4a files.
Helpful Tip: force_hdmi_open=1 keeps the carrier signal alive to the av receiver so its relay doesn't "click" between tracks in a playlist when running mplayer from command line.
$ grep Revision /proc/cpuinfo
Gives following:
Revision : a21041
Which is apparently Model B2 with 1G
$ aplay -D hw:0,1 --dump-hw-params /dev/zero
Gives following:
Same as reported in earlier post by 'skyunlimited' except both 16 bits and 24 bits are supported and the Period_Bytes are now 262144.
Hope this helps anyone else out there running into problems with keeping their audio operational after upgrading the Pi OS.
Update:
Reboot after completing the steps on previous post the audio again would not work. Discovered that it is necessary to edit asound.conf and change hw:0,1 to hw:0,0. Save and reboot. Then edit asound.conf and change hw:0,1 save and $ alsactl kill rescan. This repairs the sound.
Note that the Pi must boot with asound.conf hw:0,0.
Booting with asound.conf hw:0,1 the sound will not work and $ alsactl kill rescan is not sufficient to change hw:0,1 to hw:0,0 and then back to hw:0,1.
I have not figured out the reason for this behavior.
$ aplay -l shows ALSA on card 0 devices 0, 1, and 2. Perhaps this is an artifact of Raspbian-Buster developed for the Pi4 which has dual HDMI outputs while my Pi2B has only a single HDMI output. Possibly the kernel needs to be edited to eliminate the second HDMI device.
Reboot after completing the steps on previous post the audio again would not work. Discovered that it is necessary to edit asound.conf and change hw:0,1 to hw:0,0. Save and reboot. Then edit asound.conf and change hw:0,1 save and $ alsactl kill rescan. This repairs the sound.
Note that the Pi must boot with asound.conf hw:0,0.
Booting with asound.conf hw:0,1 the sound will not work and $ alsactl kill rescan is not sufficient to change hw:0,1 to hw:0,0 and then back to hw:0,1.
I have not figured out the reason for this behavior.
$ aplay -l shows ALSA on card 0 devices 0, 1, and 2. Perhaps this is an artifact of Raspbian-Buster developed for the Pi4 which has dual HDMI outputs while my Pi2B has only a single HDMI output. Possibly the kernel needs to be edited to eliminate the second HDMI device.
Hi, I need you help please,
couldn't get a SupTronics ST6000-7.1, but the version with 8 Ch.(4x2ch.) Raspberry Pi Expansion Board
The output with Pi 3B+ looks like this: (Kernel 5.4.51-v7+)
and:
With:
i hear on all four stereo outputs the "Front Left" and "Front Right" signal - 4x2 channels.
Any idea how I can get it work for a 2x8 channel crossover?
Thanks!
couldn't get a SupTronics ST6000-7.1, but the version with 8 Ch.(4x2ch.) Raspberry Pi Expansion Board
The output with Pi 3B+ looks like this: (Kernel 5.4.51-v7+)
Code:
pi@raspberrypi:~ $ aplay -D hw:0,0 --dump-hw-params /dev/zero
Playing raw data '/dev/zero' : Unsigned 8 bit, Rate 8000 Hz, Mono
HW Params of device "hw:0,0":
--------------------
ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED
FORMAT: U8 S16_LE
SUBFORMAT: STD
SAMPLE_BITS: [8 16]
FRAME_BITS: [8 32]
CHANNELS: [1 2]
RATE: [8000 192000]
PERIOD_TIME: [10000 16384000]
PERIOD_SIZE: [256 131072]
PERIOD_BYTES: [1024 131072]
PERIODS: [1 128]
BUFFER_TIME: (1333 16384000]
BUFFER_SIZE: [256 131072]
BUFFER_BYTES: [1024 131072]
TICK_TIME: ALL
--------------------
Code:
pi@raspberrypi:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]
Subdevices: 3/4
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]
Subdevices: 4/4
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
card 2: sndrpihifiberry [snd_rpi_hifiberry_dacplusadc], device 0: HiFiBerry DAC+ADC HiFi multicodec-0 [HiFiBerry DAC+ADC HiFi multicodec-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
Code:
pi@raspberrypi:~ $ speaker-test hw:0 -c 8Any idea how I can get it work for a 2x8 channel crossover?
Thanks!
If I remember correctly, the 2x4 channel board is configured to output four copies of the stereo signal, exactly what you have observed. This is how the board hardware is set up, so I do not believe that there is no way to modify it to get 8 separate channels.
I wish they still made the 7.1 boards because they work pretty well and were inexpensive. They are pretty much impossible to find now.
Have you looked at the Monoprice "Blackbird" 4K HDMI audio extractor:
Amazon.com: Monoprice BlackbirdTM 4K Series 7.1 HDMI Audio Extractor: Electronics
The same or similar unit is available for less at Part Express:
HDMI 4K2K LPCM 7.1 Audio Extractor
I have not tested one, so I can't comment on the audio quality, but it does get you 8 channels of audio via HDMI as long as the kernel allows it.
Thank's Charlie,
it's strange, I just plugged the X6000K-8.0CH board into another mashine (Ubuntu 18.04.5) and there it looks not bad:
aplay -L shows all surround lables:
The results of my first post are the same with plain and modified Buster kernel.
it's strange, I just plugged the X6000K-8.0CH board into another mashine (Ubuntu 18.04.5) and there it looks not bad:
Code:
~$ aplay -D hw:0,1 --dump-hw-params /dev/zero
Wiedergabe: Rohdaten '/dev/zero' : Unsigned 8 bit, Rate: 8000 Hz, mono
»HW Params« von Gerät "hw:0,3":
--------------------
ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED
FORMAT: S16_LE S32_LE
SUBFORMAT: STD
SAMPLE_BITS: [16 32]
FRAME_BITS: [32 256]
CHANNELS: [2 8]
RATE: [32000 192000]
PERIOD_TIME: (20 256000]
PERIOD_SIZE: [4 8192]
PERIOD_BYTES: [128 262144]
PERIODS: [2 32]
BUFFER_TIME: (41 512000]
BUFFER_SIZE: [8 16384]
BUFFER_BYTES: [128 65536]
TICK_TIME: ALL
--------------------
aplay: set_params:1299: Sample-Format nicht unterstützt
Available formats:
- S16_LE
- S32_LE
Code:
........
front:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Front speakers
surround21:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
.....You can try to access 8 channels individually on the Ubuntu system and see if that works. But according to the product page at Suptronics it seems that the board duplicates 2ch audio (left and right) four times. See the image at this link:
http://www.suptronics.com/miniPCkits/images 4/x6000-1000p8.jpg
http://www.suptronics.com/miniPCkits/images 4/x6000-1000p8.jpg
-D hw:0,0 is something else than -D hw:0,1. Often alsa drivers define the first device as stereo and the second device as multichannel (if supported by the HW).
OK, sorry for misreading the post. Yet the aplay -L does not show HDMI, but the multichannel analog output.
It would be useful to test the HDMI device on an x86 PC with proper Intel-HDA HDMI controller/drivers. Meanwhile proper RPi multichannel HDMI to be investigated (quite a popular topic). IMO the problem is here linux/bcm2835-pcm.c at master * torvalds/linux * GitHub - according to How to enable 5.1 channel audio over HDMI - Raspberry Pi Forums
It would be useful to test the HDMI device on an x86 PC with proper Intel-HDA HDMI controller/drivers. Meanwhile proper RPi multichannel HDMI to be investigated (quite a popular topic). IMO the problem is here linux/bcm2835-pcm.c at master * torvalds/linux * GitHub - according to How to enable 5.1 channel audio over HDMI - Raspberry Pi Forums
Thank you all, the complete "aplay -L" shows HDMI, I can check tomorrow the Ubuntu mashine if there is sound on the outputs:
Code:
:~$ aplay -L
default
Playback/recording through the PulseAudio sound server
null
Discard all samples (playback) or generate zero samples (capture)
pulse
PulseAudio Sound Server
hdmi:CARD=HDMI,DEV=0
HDA ATI HDMI, HDMI 0
HDMI Audio Output
dmix:CARD=HDMI,DEV=3
HDA ATI HDMI, HDMI 0
Direct sample mixing device
dsnoop:CARD=HDMI,DEV=3
HDA ATI HDMI, HDMI 0
Direct sample snooping device
hw:CARD=HDMI,DEV=3
HDA ATI HDMI, HDMI 0
Direct hardware device without any conversions
plughw:CARD=HDMI,DEV=3
HDA ATI HDMI, HDMI 0
Hardware device with all software conversions
sysdefault:CARD=Generic
HD-Audio Generic, ALC3227 Analog
Default Audio Device
front:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Front speakers
surround21:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
dmix:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Direct sample mixing device
dsnoop:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Direct sample snooping device
hw:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Direct hardware device without any conversions
plughw:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Hardware device with all software conversions
audioswitcheraRight, it doesn't work with the Ubuntu mashine either. This board will not work for this application.
You are about 2 years too late. They are no longer made or sold by any company as far as I can tell.
So this is not the right one?
X6000 7.1 Hi-Fi Audio Channel Expansion Board for Raspberry Pi 3 Model B / 2B /B+
– Geekworm
The description says 7.1
X6000 7.1 Hi-Fi Audio Channel Expansion Board for Raspberry Pi 3 Model B / 2B /B+
– Geekworm
The description says 7.1
Yes, that is it.
But this is likely a "phantom" listing. It's not really available. Go ahead and try to buy one and let us know how it goes. I would be surprised if there are actually any units available but if there are, I might get a couple myself.
But this is likely a "phantom" listing. It's not really available. Go ahead and try to buy one and let us know how it goes. I would be surprised if there are actually any units available but if there are, I might get a couple myself.
Done. Order placed, will post an update if the order is cancelled.
I actually got this link from Suptronics' contact link on the X7000-7.1 information page.
Thanks for your help CharlieLaub.
I actually got this link from Suptronics' contact link on the X7000-7.1 information page.
Thanks for your help CharlieLaub.
I'm interested in using this card - if I can get hold of one - with a Raspberry Pi as a convolver running DSP filters for DRC and a 2.2 crossover. Any reason it might not work with a Pi 4? The extra CPU grunt of the Pi4 over the Pi 3 would be useful.
It was designed for the Pi3 and uses a full size HDMI port. With the Pi3 the seller provides a short rigid male-to-male "HDMI jumper" that connects the Pi's HDMI port to the HATs HDMI input. It's the copper thing in this pic:
Because the Pi 4 has a mini or micro HDMI physical connector, this connection cannot be made so easily and you need a longer, looping connector with adapter. But, sure, it will work with the Pi4 just fine.
There are other 7.1 channel HDMI audio extractors you may want to consider. I think this one is really NLA.
Because the Pi 4 has a mini or micro HDMI physical connector, this connection cannot be made so easily and you need a longer, looping connector with adapter. But, sure, it will work with the Pi4 just fine.
There are other 7.1 channel HDMI audio extractors you may want to consider. I think this one is really NLA.
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