I seem to have an issue or two with my Focusrite Scarlett 2i4 USB audio interface with RPI/RaspyFI. My new RPI boots up with RaspyFI but starting to play an mp3 file from the USB mem gives a couple of pops out and advances a second or two, pausing there. Twice I got after boot into a situation where the play would stay on normally but still no sound out. The playback info is "Stereo, 24 bit, 44.1 kHz, 192 kbps" but oftentimes it says "… 0 kbps"

I have:
5V 2A pwr in
powered USB HUB (kbd, mouse, USB memory)
Scarlett 2i4
HDMI display
wired net (waiting mail to get wireless)

I made it more simple by dropping the HUB and display, having only audio card and memory card, network and then SSH and browser to raspyfi.

I could change some configs if I just would get to know what to change, the mixer change in RaspyFI browser UI did not help for example. So, some tech info (HUB connected in this case):

dmesg
--
[ 3.532815] usb 1-1.3: new high-speed USB device number 5 using dwc_otg
[ 3.644073] usb 1-1.3: New USB device found, idVendor=1235, idProduct=800a
[ 3.658329] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3.672955] usb 1-1.3: Product: Scarlett 2i4 USB
[ 3.684560] usb 1-1.3: Manufacturer: Focusrite

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 0930:6545 Toshiba Corp. Kingston DataTraveler 102 Flash Drive / HEMA Flash Drive 2 GB / PNY Attache 4GB Stick
Bus 001 Device 005: ID 1235:800a Novation EMS

aplay -L
--
null
Discard all samples (playback) or generate zero samples (capture)
default:CARD=ALSA
bcm2835 ALSA, bcm2835 ALSA
Default Audio Device
sysdefault:CARD=ALSA
bcm2835 ALSA, bcm2835 ALSA
Default Audio Device

Any suggestions?

Well, I sorted this out. mpd.conf has audio_output section but if that section is not there, mpd will try to find something default. So, I commented the whole audio_output section and voila, mpd works ok, files from USB, radio too.

audio_output {
type "alsa"
name "Output"
device "hw:0,0"
dsd_usb "no"

}

Perhaps I some day figure out what should be there in this section if I ever wanted to activate it.

So…