IQaudIO Pi-DAC

[rst1]

[nic]

I have a PiDac languishing next to my PC just waiting for the header to be soldered I'm a bit thick when it comes to Linux etc , are you able to provide more detailed instructions regarding setting hardware volume control via SSH ? I need to use this as I have power amps with no gain controls

cheers

Nic

[ACX]

Hi rst1, thank you for the feedback. We got 3 DAC samples from IQaudIO and we are going to test them soon. I'm also interested in the hardware volume configuration.

[rst1]

Hi,
unfortunately I haven't managed to get the Volume thing on the Playback tab working last night, neither with the HifiBerry or the Pi-Dac, both end up giving "cannot open mixer: No such file or directory" when I run "alsamixer" from the commandline, regardless which mixer_type I choose. I'll try to investigate deeper when I'm at home tonight.

-Ralf

[nic]

ACX : Hifiberry and Pidac have different gender 8-pin headers , you will need to use a fresh Pi if you have already soldered headers in for Hifiberry and want to use PiDac and vice-versa. Looks a bit tricky to desolder the pin header in PiDac , PCB tracks look like a solder-sucker may do some damage

Looking forward to seeing I2S support in future releases

cheers

Nic

[ACX]

[gswg]

I am playing around with volume control. You need to use the correct mixer name in mpd.conf which then gets it all working however there appears to be an issue between the MPD volume and the ALSA volume so you hear nothing until around 70% volume. I am assuming this is a linear / logarithmic issue between MPD and ALSA - investigation continues.

To "make it work" but with limited control as described above...

first find the hw number assigned to the IQaudIO Pi-DAC...
pi@raspberrypi /etc $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpiiqaudioda [snd_rpi_iqaudio_dac], device 0: IQaudIO DAC HiFi pcm512x-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0



in /etc/mpd.conf (change the hw numbers below to correspond to your "aplay -l" results)

audio_output {

type "alsa"
name "Output"
device "hw:0,0"
mixer_control "Playback Digital"
mixer_device "hw:0"
mixer_index "0"
dsd_usb "yes"

}



Gordon@IQaudIO.com
twitter @IQ_Audio

[Peter]

Why not try one of these to changer header gender? Or am I missing something (as usual)?

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Male-To-Male-Gender-Changer.jpg (23.81 KiB) Viewed 6979 times

[rst1]

[rst1]