Allo PIANO 2.1 HI-FI DAC and 384 kHz/32bit Kernel support

Max2Play Home 2016 (en) Forums Max2Play on Raspberry PI Allo PIANO 2.1 HI-FI DAC and 384 kHz/32bit Kernel support

This topic contains 3 replies, has 2 voices, and was last updated by  Heiner Moderator 5 months, 3 weeks ago.

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  • 4. January 2017 at 10:35 #25454

    Any ideas on how to get 384 kHz/32bit working with Max2Play?

    When I use alsacap I can see …

    [email protected]:~# alsacap -c 1
    *** Scanning for playback devices ***
    Card 0, ID PianoDACPlus', namePianoDACPlus’
    Device 0, ID PianoDACPlus multicodec-0', name‘, 1 subdevices (1 available)
    2 channels, sampling rate 8000..192000 Hz
    Sample formats: S16_LE, S24_LE, S32_LE
    Subdevice 0, name subdevice #0'

    And if I look into allo.tar I can see that the firmware only goes up to 192000.

    And if I look at https://github.com/raspberrypi/linux/pull/1460 (Enable 352k8 and 384k sample rates for I2S connected boards/HATs that support those rates) it seems that others are also trying…. I also saw notes about Rune and Moode v3.0 supporting these rates from http://dietpi.com/phpbb/viewtopic.php?f=9&t=900&p=4073

    I have installed m2p_rpi3_allo_238_wps.img and are now running version Beta-170103 on a Raspberry PI 3.

    • This topic was modified 7 months, 2 weeks ago by  mattzee.
    • This topic was modified 7 months, 2 weeks ago by  mattzee.
    • This topic was modified 7 months, 1 week ago by  mattzee.
    16. January 2017 at 17:28 #25974

    Hi mattzee,
    So sorry about the late response. Unfortunately, we do not currently have a fix to support these extremely high sample rates. However, if you find a fix that could be implemented, let us know and we will look into it.

    16. January 2017 at 21:43 #25990

    Looks like Clive has already done a patch for this too, https://patchwork.kernel.org/patch/9186213/

    Do you see any issues if I compile this up and give it a go?

    20. February 2017 at 15:09 #27046

    Hi mattzee,
    Sorry about the late response. Have you tried it, yet? As mentioned, we have not had any experience with these high sample rates. Feedback would be appreciated.

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