On 14 Jul 2005, at 1:45 PM, David W. Fenton wrote:
That would suggest that each USB device adds its own timecode to the
data. If it didn't, the hub shouldn't be causing any bottlenecks,
because in computer terms, there really *isn't* much data involved.
Hi David,
My understanding is that a standard four-port USB 1.1 hub does not
assign bandwidth dynamically. Instead, it splits the bandwidth four
ways, no matter what devices you have attached, so a MIDI device
plugged into such a hub would have a maximum bandwidth of 2.75 Mb/sec,
whereas if the MIDI device were on its own USB bus with no other
devices it could get up to 11 Mb/sec.
The Belkin TetraHub fixes this problem, but only if you have USB 2.0.
It assigns each USB 1.1 device the full 11 Mb/sec (and dynamically
assigns the rest to any USB 2.0 devices.
- Darcy
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Brooklyn, NY
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