Hi – I would really like to get this working with my AudioQuest DragonFly DAC.

I have followed the steps suggested in the quick start guide. This enables me to connect with MPoD (from iPhone) to the Pi and to get a list of music. Unfortunately it does not want to play any of the files.

I am not much of a Linux expert, but I have noticed some errors in the dmesg log. The last lines read:

[ 3.302264] usb 1-1.3: new full-speed USB device number 4 using dwc_otg
[ 3.444744] usb 1-1.3: New USB device found, idVendor=21b4, idProduct=0081
[ 3.457773] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3.471037] usb 1-1.3: Product: AudioQuest DragonFly
[ 3.481934] usb 1-1.3: Manufacturer: AudioQuest inc.
[ 3.492847] usb 1-1.3: SerialNumber: (C) 2011 Wavelength Audio, ltd.
[ 7.872380] EXT4-fs (mmcblk0p2): recovery complete
[ 7.886035] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 7.900384] VFS: Mounted root (ext4 filesystem) on device 179:2.
[ 7.913755] devtmpfs: mounted
[ 7.923380] Freeing init memory: 128K
[ 9.288947] udevd[143]: starting version 175
[ 10.395678] Registered led device: led0
[ 11.820904] 4:1:1: cannot get freq at ep 0x1
[ 11.876344] usbcore: registered new interface driver snd-usb-audio
[ 17.133166] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 17.588003] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 22.663499] mmc0: missed completion of cmd 18 DMA (512/512 [1]/[1]) – ignoring it
[ 22.677567] mmc0: DMA IRQ 6 ignored – results were reset
[ 22.703122] mmc0: missed completion of cmd 18 DMA (512/512 [1]/[1]) – ignoring it
[ 22.717233] mmc0: DMA IRQ 6 ignored – results were reset
[ 27.033422] smsc95xx 1-1.1:1.0: eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
[ 31.159866] CIFS: no cache= option specified, using "cache=loose". This default will change to "cache=strict" in 3.7.
[ 37.252863] CIFS VFS: Error connecting to socket. Aborting operation
[ 37.253105] CIFS VFS: cifs_mount failed w/return code = -113

To me it seems that the DragonFly is recognised, but something seems to go wrong elsewere along the line.
I would really appreciate any suggestions on how to get this working. If I can be of any assistance in testing or whatever, glad to help!

Hi Erik, I'm further investigating the problem with the Dragonfly. As i told you, it seems that it uses by default 24 bits communication, so my goal is to detect where this command is stored, and change it in 16 bit mode.
By the way, if the foundation can solve the tedious usb problems, this issue will no more affect your music. Just be patient, I'll sort it out!

A post is coming also to show the complete situation, since I think lot of people will be interested in using the Audioquest Dragonfly with RaspyFi!

[email protected] ~ $ cat /proc/asound/card1/pcm0p/sub0/hw_params
access: RW_INTERLEAVED
format: S24_3LE
subformat: STD
channels: 2
rate: 96000 (96000/1)
period_size: 12000
buffer_size: 48000

Con flac a 96Khz Si sentono spesso dei clip, con flac a 44Khz va un po' meglio ma i clip ci sono ancora.

[email protected] ~ $ lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 0424:2512 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 005: ID 058f:9254 Alcor Micro Corp. Hub
Bus 001 Device 006: ID 059f:1022 LaCie, Ltd
Bus 001 Device 007: ID 413c:2003 Dell Computer Corp. Keyboard
Bus 001 Device 008: ID 13b1:0020 Linksys WUSB54GC v1 802.11g Adapter [Ralink RT73]
Bus 001 Device 009: ID 21b4:0081

The USB fix worked for me using my dragonfly. Thanks very much, the perfect little player now, just gonna have to wait for the shortcrust pi case to come out and i think it will be perfection! Also any little leftover pops i did get are gone when unplugging the ethernet cable, so next thing for me is to try a wireless nano card that also uses the usb and see if that allows me to control raspyfi without the pops caused by usingthe cable (until possibly a fix is found).

Thanks for the link, already one step ahead tho and already used the great guide for setting up wireless I didnt use "sudo alsamixer" at all, is there any need to? Sadly I still get the odd click especially on higher res tracks, will this be addressed in the next version of raspyfi?

I was able to get the dragonfly working on version 1.0 of Raspyfi. But, the sound is very soft. The web GUI says 100, but it is hardly audible with headphones.
Any ideas?