Casio CZ/ VZ/ FZ - Pro Series

He he,

I liked the phrase "It's easy to be a general after the battle" if it  
wasn't for Sequential Circuits we wouldn't have midi period,we would  
be stuck with DCB or 16 CV-Gate leads for an 8-voice polysynth...

J

On 22 Aug 2013, at 09:28, Daniel Forró wrote:

>
> On 22 Aug, 2013, at 3:21 PM, fulfil_objective wrote:
>
>> High speed sysex transfer is both desired and encouraged, for
>> example, in the case of sending sound data to a sampler. If you
>> wanted to send 128 megabytes of sounds to your sampler, and if you
>> were restricted to 31250 bps, it would take 9.5 hours to send the
>> sounds. USB MIDI devices enable higher speeds, and that speed is
>> encouraged.
>
> Yes, in the times when nobody used USB for MIDI, SCI used higher MIDI
> speed for the purpose of SDS in some of their instruments, but very
> soon this idea was abandoned and manufacturers started to use SCSI
> SMDI standard for sample transfers.
>
>>
>> 31250 bps is the speed of an old dialup modem (actual throughput) on
>> a good day. If you tested at 115200 bps, that is merely 3.7 times
>> faster than 31250 bps. Still very slow by today's standards.
>
> Yes, today's standard are today's standard. Nobody knew anything about
> them 30 years ago. Try to see it this way. It's easy to be a general
> after the battle.
>
>> So yes, I think a capable modern computer with a good USB system can
>> send sysex out faster than the CZ can deal with it. And it's not
>> necessarily tied to CPU speed of the computer either, more like the
>> speed of the whole computer-USB system.
>>
>> You will probably find it enlightening to read the "Universal Serial
>> Bus Device Class Definition for MIDI Devices", Release 1.0, Nov 1,
>> 1999, which you cand download here:
>>
>> http://www.usb.org/developers/devclass_docs/midi10.pdf
>
> Yes, but transfer between the interface and the target MIDI device
> must follow MIDI standard, which is 31250 bps. Dot.
>
> Daniel Forro
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>