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Topics - thomas

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PIANO HI-FI DAC / Alternative to Piano DAC 1.1 and Kali?
« on: February 07, 2019, 01:21:49 PM »
Hi Allo team,

currently I am having a Piano DAC 1.1 and Kali reclocker combination. I've seen that you released new DACs meanwhile. I am running a RPI3 with Libreelec. Would switching to a Boss DAC result in an audible difference or have other advantages?

Thanks for creating such awesome RPI boards!

Hi Allo team,

I updated my Libreelec installation and seems like the newer Kernel causes issues resulting in constant noise without being able to hear anything else. Going back to the previous version the noise is gone and I can play music again.

Others reported the same issue ( but for Volumio, where it seems possible to change the bitdepth to 32 bit.
Libreelec doesn't have such an option AFAIK.

Is there another way to enforce the change to 32 bit?

Thanks for your help!

PIANO HI-FI DAC / Allo Piano Dac 1.1 & Raspberry Pi 3 Model B, no sound
« on: January 23, 2017, 02:25:34 AM »
Hi Allo team,
on weekend I received my Allo Piano Dac 1.1 along with the Kali board. First thanks for the really quick delivery!

But I couldn't make the Dac work. I've mounted it to my Pi board without the Kali board first, using the Allo power adapter.

As Pi images I've tried Libreelec 7.95.1 Beta and Volumio 2.041. Everything is connected and so far setup fine, that I can select the Pianao DAC within the Libreelec interface as well as in the Volumio interface. But no sound is coming through, neither through the RCA connectors nor through the headphone jack.

Before describing my setup further, one question: What is the on board Pi Compatibility switch for? Nowhere found a description of its purpose and when to switch to which position.

Here is my setup for Libreelec
in /flash/config.txt appened:
Code: [Select]

The output of vcdbg log msg is:
Code: [Select]
dtdebug: Opened overlay file 'overlays/allo-piano-dac-pcm512x-audio.dtbo'
Loaded overlay 'allo-piano-dac-pcm512x-audio'
dtdebug: Found fragment 0 (offset 36)
dtdebug: merge_fragment(/soc/i2s@7e203000,/fragment@0/__overlay__)
dtdebug:   +prop(status)
dtdebug: merge_fragment() end
dtdebug: Found fragment 1 (offset 112)
dtdebug: merge_fragment(/soc/i2c@7e804000,/fragment@1/__overlay__)
dtdebug:   +prop(#address-cells)
dtdebug:   +prop(#size-cells)
dtdebug:   +prop(status)
dtdebug: merge_fragment(/soc/i2c@7e804000/pcm5142@4c,/fragment@1/__overlay__/pcm5142@4c)
dtdebug:   +prop(#sound-dai-cells)
dtdebug:   +prop(compatible)
dtdebug:   +prop(reg)
dtdebug:   +prop(status)
dtdebug: merge_fragment() end
dtdebug: merge_fragment() end
dtdebug: Found fragment 2 (offset 316)
dtdebug: merge_fragment(/soc/sound,/fragment@2/__overlay__)
dtdebug:   +prop(compatible)
dtdebug:   +prop(i2s-controller)
dtdebug:   +prop(status)
dtdebug: merge_fragment() end

The output of dmesg is:
Code: [Select]
snd-allo-piano-dac soc:sound: ASoC: CPU DAI (null) not registered
snd-allo-piano-dac soc:sound: snd_soc_register_card() failed: -517
snd-allo-piano-dac soc:sound: ASoC: CODEC DAI pcm512x-hifi not registered
snd-allo-piano-dac soc:sound: snd_soc_register_card() failed: -517
snd-allo-piano-dac soc:sound: pcm512x-hifi <-> 3f203000.i2s mapping ok

The output of lsmod is:
Code: [Select]
Module                  Size  Used by
hci_uart               15605  1
btbcm                   5315  1 hci_uart
bluetooth             291488  3 hci_uart,btbcm
brcmfmac              181893  0
snd_soc_pcm512x_i2c     2051  1
snd_soc_pcm512x        16692  1 snd_soc_pcm512x_i2c
snd_soc_bcm2835_i2s     5123  2
snd_soc_allo_piano_dac     2432  0
brcmutil                4893  1 brcmfmac
snd_soc_core          104527  3 snd_soc_pcm512x,snd_soc_allo_piano_dac,snd_soc_bcm2835_i2s
cfg80211              246082  1 brcmfmac
snd_pcm_dmaengine       2943  1 snd_soc_core
snd_pcm                68095  4 snd_soc_pcm512x,snd_pcm_dmaengine,snd_soc_allo_piano_dac,snd_soc_core
snd_timer              17690  1 snd_pcm
snd                    41825  3 snd_timer,snd_soc_core,snd_pcm
bcm2835_gpiomem         2716  0
i2c_bcm2835             5101  0

The output of amixer -c 0 info is:
Code: [Select]
Card hw:0 'PianoDAC'/'PianoDAC'
  Mixer name    : ''
  Components    : ''
  Controls      : 20
  Simple ctrls  : 19

The output of aplay -l is:
Code: [Select]
**** List of PLAYBACK Hardware Devices ****
card 0: PianoDAC [PianoDAC], device 0: Piano DAC HiFi pcm512x-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

The output of aplay -L is:
Code: [Select]
    Discard all samples (playback) or generate zero samples (capture)
    Default Audio Device
    Default Audio Device

Checking with amixer I saw the the volume for Digital was set to 100%. All other mixer options do not seem to be relevant, right?
Is there anything else that I need to enable? Reading about the device tree stuff it looks like explicitly enabling i2s isn't needed.

Any help is very welcome!

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