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fooks wrote:in my new pc is not compatible with guitar port, which seems to mess everything up.
Line 6 wrote:Chipset – You computer’s motherboard has a specific chipset type and Line 6 Monkey
scans this to see if yours might be one known to have problems with USB audio hardware.
TonePort and other USB audio devices require a maximum bandwidth as well as an
uninterrupted data flow in two directions to continually input and output audio data at a
fixed sample rate. The USB isochronous transfer mode is intended to guarantee this
uninterrupted data flow. Standard USB 1.1 specifications do provide for this performance,
but there are some chipsets that have been identified as having a flaw where the USB data
flow can be interrupted, causing dropouts and bursts of white noise from the analog
outputs of the USB device. The chipsets we have verified as having this type of problem
are several using the Intel ICH6 architecture, including models 915G, 915P and 925X.
Note that this chipset issue is one that affects all USB 1.1 audio interfaces and not just
those manufactured by Line 6. Intel has published information on their website
acknowledging this issue and provides more technical details. Other USB audio hardware
manufacturers have posted warnings of this issue as well. It is also important to note that
you may not experience problems with other USB devices such as printers or hard drives
on systems with these problem chipsets, since these devices utilize a USB bulk transfer
mode, and momentary data interruptions do not result in noticeable problems in the
performance of these types of devices.
The most successful workaround we have found is adding a PCI-based USB card (to
desktop computers with these chipsets) or a CardBus or PCMCIA USB controller card (for
laptops with these chipsets). Once these cards are installed, these computers often stop
exhibiting the "white noise burst" problem, because the USB implementation on these
cards overrides the flawed built-in USB implementation of the computers. We have had
positive reports on USB add-on cards that utilize NEC chipsets, such as the SIIG USB 2.0
Dual-Port PCI model. For a PCMCIA card, the USB 2.0 models manufactured by D-Link
have also performed well in our testing. Some problems reported have been specific to
USB cards with VIA chipsets. It's important to note, however, that adding a USB card
doesn't always solve the problem. Some computers, probably because of the way they
handle USB, still exhibit this problem even after a card is installed. Line 6 and other audio
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