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<blockquote data-quote="William Kueppers" data-source="post: 108764" data-attributes="member: 4925">Re: X32 DiscussionKarl let me shed some light on this. First we all know that traffic cops&nbsp; are poor traffic controllers. We also know that Dictatorships are very&nbsp; efficient. USB is a master/slave (host/client) protocol up to V3. There&nbsp; is no arbitration which I think you have confused with CSMA/CD a&nbsp; Ethernet protocol. USB has nothing to do with it. USB was originally for&nbsp; slow devices such as keyboards, mice, and printers. It provided a&nbsp; deterministic minimum response time for devices via round robin service.&nbsp; It has evolved over time to deal with faster data rates (v3.1 at&nbsp; 10Gbps) and somewhat different usage such as OTG (host arbitration) and&nbsp; other specialized uses. I&#039;m surprised that the USB Audio spec has never&nbsp; been used extensively by companies. It&#039;s been around for a long time.&nbsp; Concepts have been copied of course. I believe that the Fruit and M$&nbsp; think they have a better mousetrap (make that a cash cow lock in).On&nbsp; to Firewire or the serial SCSI (Shugart origin) protocol. It was&nbsp; designed for high speed large amounts of data transfer off disc&#039;s etc.&nbsp; It is a peer to peer protocol for more intelligent devices and&nbsp; eliminates the involvement of the processor (CPU) for the bulk of the&nbsp; job by using DMA ( direct memory access). This (DMA) and the low&nbsp; overhead and priorty levels (isochronous data transfer for audio) give&nbsp; it the edge. Speed has also been improved over time. Hardware&nbsp; arbitration makes the traffic cop part fast. I hope this has helped&nbsp; clarify the differences without too much boring detail and I have run&nbsp; down and buried the traffic cop.</blockquote>

[QUOTE="William Kueppers, post: 108764, member: 4925"] Re: X32 Discussion Karl let me shed some light on this. First we all know that traffic cops are poor traffic controllers. We also know that Dictatorships are very efficient. USB is a master/slave (host/client) protocol up to V3. There is no arbitration which I think you have confused with CSMA/CD a Ethernet protocol. USB has nothing to do with it. USB was originally for slow devices such as keyboards, mice, and printers. It provided a deterministic minimum response time for devices via round robin service. It has evolved over time to deal with faster data rates (v3.1 at 10Gbps) and somewhat different usage such as OTG (host arbitration) and other specialized uses. I'm surprised that the USB Audio spec has never been used extensively by companies. It's been around for a long time. Concepts have been copied of course. I believe that the Fruit and M$ think they have a better mousetrap (make that a cash cow lock in). On to Firewire or the serial SCSI (Shugart origin) protocol. It was designed for high speed large amounts of data transfer off disc's etc. It is a peer to peer protocol for more intelligent devices and eliminates the involvement of the processor (CPU) for the bulk of the job by using DMA ( direct memory access). This (DMA) and the low overhead and priorty levels (isochronous data transfer for audio) give it the edge. Speed has also been improved over time. Hardware arbitration makes the traffic cop part fast. I hope this has helped clarify the differences without too much boring detail and I have run down and buried the traffic cop. [/QUOTE]

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