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Linux hints

Posted by soundchekk (A) on April 17, 2014 at 04:57:54

In Reply to: Audioquest Dragonfly 1.2 - My early experiences posted by soundchekk on April 16, 2014 at 03:54:53:

Some Linux hints related to the Dragonfly

You need to open a terminal first.


1. Find out card number

cat /proc/asound/cards

or store exact result in variable

cardnumber="(cat /proc/asound/cards | grep "\[Dragon" | tr -d " " | cut -f 1 -d "[" )"


2. Setting DF analog volume control from commandline with amixer

amixer -c $cardnumber sset "PCM" 50%

replace $cardnumber with result from 1.

and "50%" with value from range 0%-100%

3. Differentiate DF v1.0 and v1.2

"bcdDevice" variable shows DF revision


[root@abcde ~]# lsusb -vv

Bus 002 Device 002: ID 21b4:0081
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x21b4
idProduct 0x0081
bcdDevice 1.20
iManufacturer 1 AudioQuest inc.
iProduct 2 AudioQuest DragonFly
iSerial 3 (C) 2013 Wavelength Audio, ltd.
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 131
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 200mA
...
...


Enjoy.

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