[LAU] Roland A500S: snd-usb-audio error -5

[david]

On 01/28/2017 01:41 PM, Len Ovens wrote:
> On Sat, 28 Jan 2017, david wrote:
>
>> On 01/28/2017 01:11 PM, Len Ovens wrote:
>>> On Sat, 28 Jan 2017, david wrote:
>>>
>>>> That's interesting. I wonder of their "Advanced" term is just a
>>>> synonym for "Proprietary"?
>>>
>>> The manual does not claim this is Roland technology or that it is
>>> licenced from someone else. Looking up FPT USB MIDI on the web does only
>>> return Roland/Cakewalk pages for as long as I looked.
>>
>> Sounds a bit proprietary to me. Even if a technology isn't patented or
>> otherwise legally restricted - if no one else uses it, it's
>> effectively proprietary.
>
> I agree, in general if I driver is needed for both Windows and MacOS, I
> concider it proprietary.
>
>> Haven't most modern/current MIDI devices switched to USB? If so, do
>> the old MIDI hardware transmission speed limits still apply?
>
> It depends... Some just take the base midi and add a USB chip in which
> case there is no speed improvement. Beyond that, I don't know. Even
> USB1.1 is certainly able to go faster.

So I wonder. Is there some sort of upper speed limit in the MIDI 
standard? Is the MIDI standard smart enough to negotiate speeds if 
various MIDI devices differ? Or was the MIDI standard strict in saying 
that your device must operate at this official speed?

-- 
David W. Jones
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authenticity, honesty, community
http://dancingtreefrog.com