Sony MZ-R55

Fix:  This occurs if a system’s soundcard is ISA based — common 
for standard on board audio solutions (since Windows cannot 
automatically take a setting away from an ISA soundcard and give it 
to the PCLink). It will also occur if you are running an audio program 
when you plug in or unplug the PCLink. Make sure to therefore close 
all audio programs before doing this. You may need to configure your 
computer manually by selecting USB Audio Device in the 
Multimedia Control Panel or the Sounds and Multimedia 
Properties control panel. See the section “Checking that the PCLink 
is selected as preferred device” (page 7) earlier in this manual for 
further details.

Problem:  You have installed the PCLink and it seems to be recording 
fine, except there are pops and clicks every now and then.

Fix:  Some USB host controllers do not function within USB 
specification. Also Windows, in conjunction with other hardware in 
your system, may be consuming all the isochronous bandwidth of the 
USB bus. Both of these interfere with the data flowing to the PCLink, 
causing it to randomly add pops and clicks. The main instances 
where this occurs is if:

• USB frame rates are out of specification – isochronous data transfer 

(required for audio) is not possible via USB with a frame rate that is 
too fast or too slow.

• Controllers do not enumerate devices correctly – some controllers 

do not send USB resets at the appropriate times or may enumerate 
one part of a composite device.

• Corrupting audio data – some USB controllers introduce artifacts 

into sound data (i.e. CATC traces of USB data have shown non-zero 
vales in data that should be all zeros).