This is the same system I'm building! I'm using an old Onkyo for DAC/amp duties.
Multichannel HDMI amp seems the most cost effective way to build an active crossover system right now, as most high-quality RPi DACs are only 2ch.
I've been trying to use Jack between M PD and BruteFIR, but maybe I should just pipe it straight from MPD.
Multichannel HDMI amp seems the most cost effective way to build an active crossover system right now, as most high-quality RPi DACs are only 2ch.
I've been trying to use Jack between M PD and BruteFIR, but maybe I should just pipe it straight from MPD.
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Pipe has more merit, for example, to prevent from breath of system, you may add just,
cat | FIRfilter_Process| cat | output_Process
this involves system buffers automatically.
cat | FIRfilter_Process| cat | output_Process
this involves system buffers automatically.
keylimesoda wrote "Multichannel HDMI amp seems the most cost effective way to build an active crossover system right now, as most high-quality RPi DACs are only 2ch."
I have placed an order of this Decoder HDMI to 7 1 Analog Audio Converter HDMI Digital Audio Amplifier Machines | eBay
in ebay ,I will check if this is good for our application,
And probably I will use this with Parallel World amplifier(OP amp only
power amp).
on high , TPA3116D2 PBTL version on low, mid might be TPA3116D2.
I have placed an order of this Decoder HDMI to 7 1 Analog Audio Converter HDMI Digital Audio Amplifier Machines | eBay
in ebay ,I will check if this is good for our application,
And probably I will use this with Parallel World amplifier(OP amp only
power amp).
on high , TPA3116D2 PBTL version on low, mid might be TPA3116D2.
I think this is the best price.
HDMI to HDMI Digital Audio to Analog Converter LPCM 7 1CH DAC Audio Extractor | eBay
See thist post to modification to 7.1 channel LPCM from HDMI.
RUNE Audio and Brutefir (Convolver for Roomcorrection) : DIY and tweaks - Page 2 • RuneAudio Forum
I still could not prove, forgive my English.
HDMI to HDMI Digital Audio to Analog Converter LPCM 7 1CH DAC Audio Extractor | eBay
See thist post to modification to 7.1 channel LPCM from HDMI.
RUNE Audio and Brutefir (Convolver for Roomcorrection) : DIY and tweaks - Page 2 • RuneAudio Forum
I still could not prove, forgive my English.
IN RUNE Audio and Brutefir (Convolver for Roomcorrection) : DIY and tweaks - Page 2 • RuneAudio Forum
it described just only upto 48000Hz 16bit?
Our evaluation on special HDMI driver seems to be able to handle higher sample rate.
it described just only upto 48000Hz 16bit?
Our evaluation on special HDMI driver seems to be able to handle higher sample rate.
Hi, AEDIO
I worked for the generation of filters this fantastic tool.
http://www.audiovero.de/en/acourate.php
This creates a wav to convolve in Brutefir, for example. With your driver we could make use of them ?.
I worked for the generation of filters this fantastic tool.
http://www.audiovero.de/en/acourate.php
This creates a wav to convolve in Brutefir, for example. With your driver we could make use of them ?.
Yes it is right, my multichannel solution "only" works up to 48000 Hz and 16 bit. 44,1 kHz 16bit is CD standard and absolutely all right for me...
Take a look a the the whole Thread https://github.com/raspberrypi/linux/issues/1000 thats why i did not use other values.
Do you use a modified omxplayer?
Regards
Take a look a the the whole Thread https://github.com/raspberrypi/linux/issues/1000 thats why i did not use other values.
Do you use a modified omxplayer?
Regards
Hi Isabido
"assi's" crossover filter uses FIR filter.
And it has also EQ part implemented in IIR filter.
And from my experiences room compensation sounded less smooth
than using high end drivers, as room acoustic correction is varies
by position in the room.
For example , you can see the measurement result of the drivers
I have demonstrated Dec.,27 ,2015.
at facebook
https://www.facebook.com/yutaka.iida.aedio/posts/970597729673982?pnref=story
In this configuration , there was no need to compensate if the room acoustics is smooth.
"assi's" crossover filter uses FIR filter.
And it has also EQ part implemented in IIR filter.
And from my experiences room compensation sounded less smooth
than using high end drivers, as room acoustic correction is varies
by position in the room.
For example , you can see the measurement result of the drivers
I have demonstrated Dec.,27 ,2015.
at facebook
https://www.facebook.com/yutaka.iida.aedio/posts/970597729673982?pnref=story
In this configuration , there was no need to compensate if the room acoustics is smooth.
hi skyunlimited,
I donot know exactly. "assi" does not use omxplayer as it did not work as expected, I heard.
"assi" software uses his own hdmi_play.bin(2)
Please read by using online trasnlator software such as Google browser
http://audio2.amanogawa.info/article/raspi/02.html
The software is here,
http://audio2.amanogawa.info/public/text/hdmi_play.c
Any question?
I donot know exactly. "assi" does not use omxplayer as it did not work as expected, I heard.
"assi" software uses his own hdmi_play.bin(2)
Please read by using online trasnlator software such as Google browser
http://audio2.amanogawa.info/article/raspi/02.html
The software is here,
http://audio2.amanogawa.info/public/text/hdmi_play.c
Any question?
In my case I need to convolve my own filters. Then send them via HDMI.
Acourate generated filters, integrated into a single WAV for each way (crossover, driver linearization, alignment, and room correction).
I think that the system would function.
Acourate generated filters, integrated into a single WAV for each way (crossover, driver linearization, alignment, and room correction).
I think that the system would function.
Isabido,
Did you already implement these features on your software?
If so I hope you will get good result.
Did you already implement these features on your software?
If so I hope you will get good result.
That software is not my property, I'm a user. I think with my bad English, we have not understood.
Reference:
http://www.audiovero.de/en/acourate.php
I mean that the software generates filters per channel, to run on a Convolver such as Brutefir.
Reference:
http://www.audiovero.de/en/acourate.php
I mean that the software generates filters per channel, to run on a Convolver such as Brutefir.
By taking a look at the source i found that this Software uses openmax (omxplayer), i think the same way kodi uses it. This is something I was looking for a long time. Whenever it comes to multichannel audio via Hdmi, it comes to this closed source thing but it is never explained how to do it. Hdmi-play makes it possible to pipe into openmax. (There is no alsa-sink for openmax).
I will try it later this weekend.
Regards
PS: Using google translate makes things funny but it is hard to understand 🙂
I will try it later this weekend.
Regards
PS: Using google translate makes things funny but it is hard to understand 🙂
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3type programs can be downloaded as binary form at Index of /software
this system is working on Raspi2 with Raspbian OS.
About explanation,
From "assi" I have received 3 programs, I have here trasnlated his e-mail to English.
==== Start of "assi" comments====
This program modified from demonstration software /opt/vc/src/hello_pi/hello_audio/audio.c
This demo software was not working as 8 channels outputs
on newly purchased YAMAHA AV amp.
That might be partially my fault because I did not understand OpenMX
features and know-hows.So I have to struggle to let it work with various
AV amp and OpenMX.
My program is NOT the standard-like software , but I like to make them work
even the code is dirty.
In the page there are 3 programs,
hdmi_play.bin2: originally written and tested for Marantz NR1501 after trials and errors I could make them work as 8 channel output.
The follwing 2 programs are not verified on Marantz NR-1501 (Yutaka IIDA will have to verify).
hdmi_play.bin2A:LFE channel is mapped to CS(Center / Sub?) , this worked well on Yamaha RX-A1040 AV amp.
hdmi_play2B.bin channel mapping was changed to "1" to "8". this worked well in Yamaha RX-A1040.
(1) copy programs into /usr/bin
sudo cp hdmi_play2?.bin /usr/bin/
(2) then you have to edit pipe out section of /etc/mpd.conf
audio_output {
type "pipe"
name "amafir"
; followings are sample for hdmi_play2A.bin
; command "amafir /home/pi/amafir | nice -n -20 hdmi_play2.bin 96000"
command "amafir /home/pi/amafir | nice -n -20 hdmi_play2A.bin 96000"
; command "amafir /home/pi/amafir | nice -n -20 hdmi_play2B.bin 96000"
format "96000:32:2"
}
====end of "assi" comments====
this system is working on Raspi2 with Raspbian OS.
About explanation,
From "assi" I have received 3 programs, I have here trasnlated his e-mail to English.
==== Start of "assi" comments====
This program modified from demonstration software /opt/vc/src/hello_pi/hello_audio/audio.c
This demo software was not working as 8 channels outputs
on newly purchased YAMAHA AV amp.
That might be partially my fault because I did not understand OpenMX
features and know-hows.So I have to struggle to let it work with various
AV amp and OpenMX.
My program is NOT the standard-like software , but I like to make them work
even the code is dirty.
In the page there are 3 programs,
hdmi_play.bin2: originally written and tested for Marantz NR1501 after trials and errors I could make them work as 8 channel output.
The follwing 2 programs are not verified on Marantz NR-1501 (Yutaka IIDA will have to verify).
hdmi_play.bin2A:LFE channel is mapped to CS(Center / Sub?) , this worked well on Yamaha RX-A1040 AV amp.
hdmi_play2B.bin channel mapping was changed to "1" to "8". this worked well in Yamaha RX-A1040.
(1) copy programs into /usr/bin
sudo cp hdmi_play2?.bin /usr/bin/
(2) then you have to edit pipe out section of /etc/mpd.conf
audio_output {
type "pipe"
name "amafir"
; followings are sample for hdmi_play2A.bin
; command "amafir /home/pi/amafir | nice -n -20 hdmi_play2.bin 96000"
command "amafir /home/pi/amafir | nice -n -20 hdmi_play2A.bin 96000"
; command "amafir /home/pi/amafir | nice -n -20 hdmi_play2B.bin 96000"
format "96000:32:2"
}
====end of "assi" comments====
I have tried hard, but i can not get any sound using an Onkyo SR606
I am able to pipe a test wav from sox to amafir and hdmi_play2.bin, but i can not pipe from mpd into amafir|hdmi_play2 and not even from mpd to hdmi_play2.bin.
I think there must be some other changes in the mpd.conf.
Could you please post the whole mpd.conf?
Regards
I am able to pipe a test wav from sox to amafir and hdmi_play2.bin, but i can not pipe from mpd into amafir|hdmi_play2 and not even from mpd to hdmi_play2.bin.
I think there must be some other changes in the mpd.conf.
Could you please post the whole mpd.conf?
Regards
Hi Skyunnlimited, How many taps have in your filter? You have limited access to usb.1.0 to avoid problems sync/jitter or strange noises.
Thanks!
skyunlimited,
"assi" answered as below in Japanese
===Start of "assi"'s comment===
[original J]
soxで再生できるのにmpdで再生できないのはおそらくmpd.confのなかの
hdmi_play2.bin呼び出しのところでniceを設定しているせいです。
[If you cannot play with mpd even though played with sox output , it may be caused 'nice' command preceeding 'hdmi_play2.bin' .]
[The followings are work-around for this problem.]
1.mpd.confのuserの項目をrootに変更する。 または
[1. change user in mpd.conf to 'root' (this was NOT recommended by security reason,
but you may check by this what is the root cause.]
2./etc/security/limits.confを編集してuser mpdにnice値を設定する権限を与える。
[2. set enable user 'mpd' to be able to set "nice" command and its value.]
3.nice値の設定を辞める。
[3. Discard "nice" priority setting though you may listen the breath pause of playing music.But you know what is the root cause.]
===End of "assi"'s comment===
He had sent me default user = "root" generated system, but it was not not recommended , so I did not experience any problem like this.
(a) remove "nice" in mpd.conf pipe output
or
(b) temporarily set "mpd" user as root.(my case)
"assi" answered as below in Japanese
===Start of "assi"'s comment===
[original J]
soxで再生できるのにmpdで再生できないのはおそらくmpd.confのなかの
hdmi_play2.bin呼び出しのところでniceを設定しているせいです。
[If you cannot play with mpd even though played with sox output , it may be caused 'nice' command preceeding 'hdmi_play2.bin' .]
[The followings are work-around for this problem.]
1.mpd.confのuserの項目をrootに変更する。 または
[1. change user in mpd.conf to 'root' (this was NOT recommended by security reason,
but you may check by this what is the root cause.]
2./etc/security/limits.confを編集してuser mpdにnice値を設定する権限を与える。
[2. set enable user 'mpd' to be able to set "nice" command and its value.]
3.nice値の設定を辞める。
[3. Discard "nice" priority setting though you may listen the breath pause of playing music.But you know what is the root cause.]
===End of "assi"'s comment===
He had sent me default user = "root" generated system, but it was not not recommended , so I did not experience any problem like this.
(a) remove "nice" in mpd.conf pipe output
or
(b) temporarily set "mpd" user as root.(my case)
And other example for Intel based PC and ASUS XONAR U7 sample.
http://aedio.fam.cx/software/mpd.conf.new
This is NOT HDMI and format required by device is S24_LE so 24bit conversion required.
http://aedio.fam.cx/software/mpd.conf.new
This is NOT HDMI and format required by device is S24_LE so 24bit conversion required.
I am testing as mpd user "root" and "hdmi_play2A.bin", I can map 8 channels and it seemed to work well on SONY TA-DA3200ES.
I checked ,
Front => Low / Surround => Mid / Surround Back => High as 3way FIR filter.
I guess SONY TA-DA3200ES was older one (it was released at 2006) and designed as compatible with PS-3 output. hdmi_play2A.bin was now verified with old SONY and newer YAMAHA, so most of AV amplifier which is HDMI linear PCM multi-channel compatibility.
So if you donot mind or can be responsible for risk of "root" user, you may use hdmi_pla2A.bin and "root" user.
I checked ,
Front => Low / Surround => Mid / Surround Back => High as 3way FIR filter.
I guess SONY TA-DA3200ES was older one (it was released at 2006) and designed as compatible with PS-3 output. hdmi_play2A.bin was now verified with old SONY and newer YAMAHA, so most of AV amplifier which is HDMI linear PCM multi-channel compatibility.
So if you donot mind or can be responsible for risk of "root" user, you may use hdmi_pla2A.bin and "root" user.
I have added in the directory Index of /software
- mpd.conf for Raspberry pi/HDMI multi-channel (mpd.conf.rpi2multi)
- some of configuration file for amafir program (BruteFIR)
# ls -la
合計 2408
drwxrwxrwx 2 root root 4096 1月 3 12:47 .
drwxrwxrwx 7 root root 4096 1月 2 20:52 ..
-rw-r--r-- 1 root root 1822720 1月 3 12:46 amafir_para.tar
-rw-r--r-- 1 root root 170269 1月 2 20:53 hdmi_play.tar.gz
-rwxr-xr-x 1 pi pi 142392 1月 2 04:13 hdmi_play2.bin
-rwxr-xr-x 1 pi pi 142392 1月 2 04:13 hdmi_play2A.bin
-rwxr-xr-x 1 pi pi 142392 1月 2 04:13 hdmi_play2B.bin
-rwxr-xr-x 1 root root 14273 1月 3 02:33 mpd.conf.new
-rw-r----- 1 root root 14226 1月 3 12:47 mpd.conf.rpi2multi
- mpd.conf for Raspberry pi/HDMI multi-channel (mpd.conf.rpi2multi)
- some of configuration file for amafir program (BruteFIR)
# ls -la
合計 2408
drwxrwxrwx 2 root root 4096 1月 3 12:47 .
drwxrwxrwx 7 root root 4096 1月 2 20:52 ..
-rw-r--r-- 1 root root 1822720 1月 3 12:46 amafir_para.tar
-rw-r--r-- 1 root root 170269 1月 2 20:53 hdmi_play.tar.gz
-rwxr-xr-x 1 pi pi 142392 1月 2 04:13 hdmi_play2.bin
-rwxr-xr-x 1 pi pi 142392 1月 2 04:13 hdmi_play2A.bin
-rwxr-xr-x 1 pi pi 142392 1月 2 04:13 hdmi_play2B.bin
-rwxr-xr-x 1 root root 14273 1月 3 02:33 mpd.conf.new
-rw-r----- 1 root root 14226 1月 3 12:47 mpd.conf.rpi2multi
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