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Aleksandar Pavić
Asked: 2021-11-23 03:49:55 +0800 CST

Audioquest Dragonfly black green light

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I have Audioquest Dragonfly Black, v1.5

It says on their website, when light is blue, it's registered on 48 khz when light is green it's 44.1 khz

When I plug it on laptop under windows, it's blue light, but when I plug it in the same laptop under Ubuntu 20.04 it's green light.

Any ideas how to get it to perform at 48k in Ubuntu 20.04 ?

20.04

1 Answers

  1. I was able to get blue light, after following tutorial "Enable High Quality Audio on Linux" from 2018 published on medium.com

    I've modified original config code to fit ubuntu 20.04:

    default-sample-format = float32le
default-sample-rate = 48000
alternate-sample-rate = 44100
default-sample-channels = 2
default-channel-map = front-left,front-right
default-fragments = 2
default-fragment-size-msec = 125
resample-method = soxr-vhq
remixing-produce-lfe = no
remixing-consume-lfe = no
high-priority = yes
nice-level = -11
realtime-scheduling = yes
realtime-priority = 9
rlimit-rtprio = 9
daemonize = no

    into: /etc/pulse/daemon.conf

    Alsa config on 20.04 is moved to: /usr/share/alsa/pulse-alsa.conf

    You can copy it to pulse-alsa.conf.old and edit original file with:

    with following content:

    # Use PulseAudio plugin hw
pcm.!default {
   type plug
   slave.pcm hw
}

    But I have figured out that original alasa config file works better for me!

    To restart alsa and pulse, following command works on ubuntu 20

    sudo killall pulseaudio && sudo alsa force-reload && sleep 2 && sudo killall pulseaudio && sudo alsa force-reload

    Difference is very much audible, very much!

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