[BugFix] HiFiBerry DAC+ HW Volume (RuneAudio 0.3-beta)

rhodo

I've been away this weekend but tested your solution this morning and it works excellent (although the refresh_ao command produces a lot of errors). Hardware volume control works fine now, Thanks.

Fin

ACX wrote We are planning to implement a more natural custom volume control in a future version.

Please do!

If possible, perhaps include customisation, so that the user can set the maximum level to match their amplifier choice.

aj78

Customisation of the max level (or perhaps different curves for different popular DACs) would be a great blessing: I have the IQaudio DAC, and 96% volume corresponds to 0dB. So if you put the volume to 100% and play a track that has been normalised, it clips.... It would be nice if, when you do the volume curve mapping for this DAC, setting 100% on the RuneUI actually sent 96% to the hardware.

Stwert

Yes, I would also vote for a remapping of the range to better fit with what the actual values from alsamixer are doing. (Using IQAudIO DAC+)
I realize this is a bit off thread topic, but there seems to be a discussion here already so I thought I would throw in my vote too.

shakey102001

Second that thought (IQaudio Pi-dac)

ICLlP

ACX wroteHi andy.room,
HiFiBerry Digi/Digi+ don't have hardware volume control.

What is Hardware Volume Control?

Triodefreak

No joy so far.

Step 1. I login in with user: root and password:

After executing your step 2: I see : " (integer) 0"

After executing step 3: I see: " Locked!"

And I can't go to step 4 since I have to use the ip address.

But when I go to ip addres http://192.168.178.27/mpd/ I cannot choose the hifiberry dac+

Kind regards,
Bas

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gswg

A little off topic but alsa has calls that allow the application to get the range / max and min values from the sound card's driver.

In the IQaudIO Pi-DAC(s) I've set 100% to +4db, and 0% to -103.5db (mute on the TI PCM5122 DAC) I did this as the PCM5122 will actually allow you to go up to +23db or thereabouts and if you want clipping then that was what you achieved

Anyway, just FYI

Gordon

taizen

Hi ACX,
with control volume in place with Hifiberry dac+ the sound of HiRes (24b 192kHz) has clicks and pause.
When I flash the SD Card, without volume control,It is very good !
Regards

ACX

taizen wroteHi ACX,
with control volume in place with Hifiberry dac+ the sound of HiRes (24b 192kHz) has clicks and pause.

Please check if the HiFiBerry DAC+ is the only active output with the mpc outputs command. The behaviour you describe could happen because the Rpi analog output is still enabled and resampling occurs, generating high load on the system.

taizen

Thanks ACX,
It works again

Maybe it depends of the order I enter the command lines ?
Regards

ACX

taizen wroteMaybe it depends of the order I enter the command lines ?

It's something that we want to review for the next 0.4 release.

gearhead

Just a question. Since the DAC and DAC+ use the same chip, just different pins, shouldn't there also be a similar edit for the DAC? something like this or has this been fixed. I ask as I still do not have digital volume on my HifiBerryDAC.

Keith

hondagx35

Hi gearhead,

the HifiBerryDAC has no hardware volume control.

From HiFiBerry Website:

Q: Does it have a volume control?
A: Our new HiFiBerry DAC+ board comes with an integrated volume control. However the older HiFIBerry DAC uses the digital data without any post-processing. It will output the sound stream with the volume the application feeds it. Many applications can use an internal volume control (so called software volume control). If the application you want to use does not have a software volume control, you can’t control the volume by software. However the best way to control the software is a analog volume control after the DAC. While software volume control is an option, it will reduce signal-to-noise ratio. If you connect the DAC to your amplifier, you should use the volume control of your amplifier.

gswg

The PCM5102A as used in the DAC is a line level output only.

The PCM5122 as used in the HiFiBerry DAC+ and IQaudIO DAC and DAC+ has a variable "hardware volume" control.

Gordon@iqaudio.com

davidemania

Does this fix work for HiFiBerry Dac (not the + version?) I tried the fix but when I write the "refresh_ao" command I get an answer like LOCKED! and the volume knob is stuck to 100%

thanks
Davide

ACX

For the last time: the HiFiBerry DAC (not the + version) does NOT have the hardware volume...

davidemania

Sorry! I totally missed the thread pages behind the first... wow, really a wonderful first post on the forum for me

thank you anyway!

lashnarz

Thanks for the hint. It's really works on my HifiBerry DAC+.

JeffD

Hi,

The volume control doesn't work when playing spotify, allthough it picks up the last level of the mpd player.
How can I fix this?

Jeff

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