John and list;
On Fri, Nov 13, 2020 at 8:28 AM John Covici <cov...@ccs.covici.com> wrote:
> Hi. I have a ?Dragonfly Red which is supposed to be a USB dac, and I
> am unable to connectit with alsa. Its seen by the system and here is
> what I get for the card under Alsa:
>
> 1 [v10 ]: USB-Audio - AudioQuest DragonFly Red v1.0
> AudioQuest AudioQuest DragonFly Red v1.0 at
> usb-0000:00:14.0-10.2, full speed
>
> But if I try to use something like mpv to play anything with commands
> such as
>
> mpv --audio-device=alsa/usbstream, the system comes back with invalid
> type for card.
>
> If I do aplay -l I get for the card:
>
> card 1: v10 [AudioQuest DragonFly Red v1.0], device 0: USB Audio [USB
> Audio]
> Subdevices: 1/1
>
> So, how would I even designate the device and how would I get alsa to
> play it -- there is no volume control on the device which makes it
> even more complicated.
>
> Thanks in advance for any suggestions.
>
>
As it happens I have an original DragonFly which works just fine with ALSA.
With it plugged in, instead of "aplay -l", use "aplay -L" (also it doesn't
hurt to do "sudo aplay -L"). In my case I see the following:
default:CARD=DragonFly
AudioQuest DragonFly, USB Audio
Default Audio Device
sysdefault:CARD=DragonFly
AudioQuest DragonFly, USB Audio
Default Audio Device
front:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
Front speakers
surround21:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
Direct sample mixing device
dsnoop:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
Direct sample snooping device
hw:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
Direct hardware device without any conversions
plughw:CARD=DragonFly,DEV=0
AudioQuest DragonFly, USB Audio
Hardware device with all software conversions
usbstream:CARD=DragonFly
AudioQuest DragonFly
USB Stream Output
In my case, I'm mostly interested in using the DragonFly as a dedicated
music-playing DAC so I would do the following:
1. tell PulseAudio to ignore it (I don't want it to be the system
default) - see this article for example
https://jamielinux.com/blog/tell-pulseaudio-to-ignore-a-usb-device-using-udev/
2. use the plughw:CARD=DragonFly,DEV=0 device for a music player like
GogglesMM that talks directly to ALSA, or hw:CARD=DragonFly,DEV=0 for music
players like Guayadeque that use gstreamer to talk to the DAC. This is
because, at least in the case of the original DragonFly, it only accepts
24bit signals, which you can see if you type:
cat /proc/asound/DragonFly/stream0
which in my case looks like this:
AudioQuest inc. AudioQuest DragonFly at usb-0000:00:14.0-1, full speed :
USB Audio
Playback:
Status: Stop
Interface 1
Altset 1
Format: S24_3LE
Channels: 2
Endpoint: 1 OUT (ASYNC)
Rates: 44100, 48000, 88200, 96000
Bits: 24
Channel map: FL FR
I hope this helps!
Chris Hermansen · clhermansen "at" gmail "dot" com
C'est ma façon de parler.
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