Hardware Volume Control + RPi2 + IQaudIO DAC+

fluke43

Using this image from forum page

edit your /boot/config.txt, uncomment the following
device_tree_overlay=iqaudio-dacplus
device_tree_param=i2s=on

redis-cli hset acards_details snd_rpi_iqaudio_dacplus "{\"sysname\":\"snd_rpi_iqaudio_dacplus\",\"extlabel\”:\”Iqaudio DAC+ (I&#178;S)\",\"mixer_numid\":\"1\",\"mixer_control\”:\”PCM\”,\”hwplatformid\":\"01\",\"type\":\"i2s\"}"

/srv/http/command/refresh_ao

edit your /etc/modules-load.d/raspberrypi.conf

bcm2708-rng
#snd-bcm2835
snd_soc_pcm512x
snd_soc_iqaudio_dacplus

reboot

I got a couple of errors after running the refresh_ao, I'm very new to arch and linux on the whole so please let me know if any of the steps here are not required. Getting this far took a lot of trial and error. Sounding very good through the IQaudIO Pi-Amp+ too!

hondagx35

Hi fluke43,

you only have to do this:

- edit your /boot/config.txt,

nano /boot/config.txt

uncomment (remove the # in front of it) the following
device_tree_overlay=iqaudio-dacplus

- if you like to have hardware volume control

redis-cli hset acards_details snd_rpi_iqaudio_dacplus "{\"sysname\":\"snd_rpi_iqaudio_dacplus\",\"extlabel\":\"IQaudIO Pi-DAC+ (I&#178;S)\",\"mixer_numid\":\"1\",\"mixer_control\":\"PCM\",\"hwplatformid\":\"01\",\"type\":\"i2s\"}"

/srv/http/command/refresh_ao

Frank

PS: The quotes in your redis-cli hset command are incorrect.
You do not have to enable I2S in the config file.
Do not change /etc/modules-load.d/raspberrypi.conf

fluke43

hondagx35 wrote PS: The quotes in your redis-cli hset command are incorrect.
You do not have to enable I2S in the config file.
Do not change /etc/modules-load.d/raspberrypi.conf

Hi Frank,

Thanks for the detailed reply.

I have followed your instructions using a fresh image.

I get (integer 0) after running

redis-cli hset acards_details snd_rpi_iqaudio_dacplus "{\"sysname\":\"snd_rpi_iqaudio_dacplus\",\"extlabel\":\"IQaudIO Pi-DAC+ (I&#178;S)\",\"mixer_numid\":\"1\",\"mixer_control\":\"PCM\",\"hwplatformid\":\"01\",\"type\":\"i2s\"}"

When running

/srv/http/command/refresh_ao

I get

Notice: Undefined offset: 0 in /srv/http/app/libs/runeaudio.php on line 2275

Notice: Undefined offset: 0 in /srv/http/app/libs/runeaudio.php on line 2276

Warning: socket_write(): unable to write to socket [32]: Broken pipe in /srv/http/app/libs/runeaudio.php on line 99

When I select Hardware Volume control in the MPD settings of Rune I can change the volume of the bcm2835 ALSA card, but not the IQaudIODAC from the RuneUI.

Here's the debug info http://pastebin.com/xDxqSwNr

fluke43

Frank, not 100% sure what has happened, rebooted again and its working! Thanks for your help!

fluke43

I worked out why it started working...

I had edited the raspberrypi.conf prior to rebooting

Your image has it as

bcm2708-rng
snd-bcm2835

but I had changed it to

bcm2708-rng
#snd-bcm2835

Any clarification as to why I can't get the volume control working with your specific instructions would be great!

kwanying

I got it working by changing the snd_rpi_iqaudio_dacplus to IQaudIODAC (since "aplay -l" show IQaudIODAC as the hardware ID *on PI2 Image*)

redis-cli hset acards_details IQaudIODAC "{\"sysname\":\"IQaudIODAC\",\"extlabel\":\"IQaudIO Pi-DAC+ (I&#178;S)\",\"mixer_numid\":\"1\",\"mixer_control\":\"PCM\",\"hwplatformid\":\"01\",\"type\":\"i2s\"}"

unameme

Tried your way of enabling hardware volume control, it works, but I can hear nothing under 30% and there is crackling over 80%

kwanying

what is your hardware setup?

fluke43

kwanying wrote

redis-cli hset acards_details IQaudIODAC "{\"sysname\":\"IQaudIODAC\",\"extlabel\":\"IQaudIO Pi-DAC+ (I&#178;S)\",\"mixer_numid\":\"1\",\"mixer_control\":\"PCM\",\"hwplatformid\":\"01\",\"type\":\"i2s\"}"

Thanks kwanying, its working!

unameme this thread might help.

unameme

kwanying, that's it!

Crackling in my case might have been caused by increasing volume on my amplifier too much, as it was pretty high, to hear something below 50%

fluke43, I have RPi2 + IQAudio DAC+, Denon amplifier and Tannoy DC4T speakers.

ianhaynes

I'm confused by the above.

What do you have to edit and where? The config.txt?

Where do you run this line of code?

/srv/http/command/refresh_ao

ianhaynes

Please ignore my comments above. Apologies for my ignorance!

After a few minor issues with MobaXterm I was able to run the code and get the hardware volume control working. The range is limited as others have reported, with an effective range between 60 and 100.

Cyclopse

Apologies I am new to Linux. On first boot up my card IQ Audio DAC plus is missing from pick list. I just had analogue or Hdmi out. Did what Frank suggests removing # by editing boot/con fix.txt and now have the option for IQ Audio DAC. However, DAC plus still not showing as an option.

Any help most welcome.

Thanks

Steve

ACX

Cyclopse wroteDid what Frank suggests removing # by editing boot/con fix.txt and now have the option for IQ Audio DAC. However, DAC plus still not showing as an option.

You have to edit /boot/config.txt, enabling I2S output and the IQaudIO DAC+ module. From the next release this will be managaed directly from the UI.

alienbob

Looking forward to having this option from the UI for the DAC+, been sitting here for a couple of nights fiddling with the settings wondering what the hell is going on... is my new DAC+ broken?

To clarify all I did was edit /boot/config.txt and uncommented

device_tree_overlay=iqaudio-dacplus

as per the above instructions.

EDIT:

Just downloaded beta 0.4 and come to do the same change and the config flle syntax has changed, the line is now

dtoverlay=iqaudio-dacplus

On another note I'm pretty sure that the overall volume output is higher now, which is awesome!

gearhead

This does not work for me with clean/new image. Either I get fixed volume when hardware is selected or I can have variable volume with software. Aplay -l identifies the card and I do have sound. It is a pcm5122 card and i2c is its interface.

Keith

hondagx35

Hi all,

please provide us the following info:

cat /proc/asound/cards

and from

alsamixer

The volume control name / label.

Here an example (HifiberryDAC+)

 cat /proc/asound/cards
 0 [ALSA           ]: bcm2835 - bcm2835 ALSA
                      bcm2835 ALSA
 1 [sndrpihifiberry]: snd_rpi_hifiber - snd_rpi_hifiberry_dacplus
                      snd_rpi_hifiberry_dacplus

: alsamixer.jpg (120.29 KiB) Viewed 3900 times

- sysname = "snd_rpi_hifiberry_dacplus"
- volume control name = "Digital"

gearhead

For my setup:
# cat /proc/asound/cards
0 [ALSA ]: bcm2835 - bcm2835 ALSA
bcm2835 ALSA
1 [IQaudIODAC ]: IQaudIODAC - IQaudIODAC
IQaudIODAC
2 [Camera ]: USB-Audio - USB2.0 1.3MP UVC Camera
USB2.0 1.3MP UVC Camera at usb-bcm2708_usb-1.4, high speed

From Alsamixer I select f6 : and then the card: IQaudIODAC I can select 'Digital' but cannot make increase/decrease like I can PCM and Playback.

Keith

hondagx35

Hi Keith,

so "Digital" should be the right control name.

From Alsamixer I select f6 : and then the card: IQaudIODAC I can select 'Digital' but cannot make increase/decrease

This should work.

Sorry but i have no IQaudIODAC here, so i can not test this.
Maybe some other users can help with this.

Frank

gearhead

Frank,

Thanks for the help. This used to work. I do not know what is going on. The only difference I can think of is that I am now on a wire instead of wifi. I updated the runeUI by git pull according to the other thread and still nothing. What I have is my own board which is a PCM5122 connected like an IQAudio. I get nothing when I try to use the HiFiBerryDAC+ (selected in /boot/config.txt) which uses the same chip (And I think it is connected the same way) and do not know why. Is the driver aware of any eeprom with config variables n it?I have tested this card on a Pi2 and a B+ and, like I said, it worked before, but doesn't now. It was noticeably clearer with Hardware volume control and I had almost nothing below 50% and all control was between 50 and 100%.

When I type that redis-cli command, the UI does go look like it is changing. When it goes to 'hardware', the volume goes to full volume and I cannot adjust volume from the UI. I can click a value, but it immediately goes to 0 in the UI. I can adjust volume by my up/dn keys from the terminal running alsamixer and adjusting "PCM". Digital always shows 0.

Any help?

Keith