Hardware Volume Control + RPi2 + IQaudIO DAC+

[ianhaynes]

[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]

[alienbob]

[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]

[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]

[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