Yes but you have to make sure the card uses recovered clock from the incoming SPDIF stream as its master clock. It is no problem for the cards which specifically offer "external clock" switch. However, a simple USB card with SPDIF input like http://www.ebay.com/itm/External-USB-2-0-7...=item2320e5a362 which does not offer any external clock switch, only the input selector switch (the first control called "PCM Capture Source"):
pavel@eeepc:~$ amixer -c 1 contents
numid=14,iface=MIXER,name='PCM Capture Source'
; type=ENUMERATED,access=rw------,values=1,items=4
; Item #0 'Mic'
; Item #1 'Line'
; Item #2 'IEC958 In'
; Item #3 'Mixer'
: values=0
numid=12,iface=MIXER,name='PCM Capture Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=13,iface=MIXER,name='PCM Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=6928,step=0
: values=5543,5543
| unk-4-0x00000000,0x00000452,
numid=3,iface=MIXER,name='Line Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=4,iface=MIXER,name='Line Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=8065,step=0
: values=6144,6144
| unk-4-0x00000000,0x000002ee,
numid=9,iface=MIXER,name='Line Capture Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=10,iface=MIXER,name='Line Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=6928,step=0
: values=0,0
| unk-4-0x00000000,0x00000452,
numid=1,iface=MIXER,name='Mic Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=2,iface=MIXER,name='Mic Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=8065,step=0
: values=0,0
| unk-4-0x00000000,0x000002ee,
numid=7,iface=MIXER,name='Mic Capture Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=8,iface=MIXER,name='Mic Capture Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=6928,step=0
: values=0,0
| unk-4-0x00000000,0x00000452,
numid=11,iface=MIXER,name='IEC958 In Capture Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=5,iface=MIXER,name='Speaker Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=6,iface=MIXER,name='Speaker Playback Volume'
; type=INTEGER,access=rw---R--,values=8,min=0,max=197,step=0
: values=158,158,158,158,158,158,158,158
| unk-4-0x00000000,0x00000000,
Will the CM106 chip http://www.steila.com/USB4IO/CMedia/CM106-...tasheet-1.3.pdf inside the soundcard switch its clock from its internal oscillator to the clock recovered by its internal SPDIF receiver when it is directed to switch input to the "IEC958 In" source? I don't know