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        General >> 3rd Party >> serial rs232 <+> midi interchanger new approch 
        
(Message started by: vsmvdd on Dec 1^st, 2006, 12:18am)

Title: serial rs232 <+> midi interchanger new approch
Post by vsmvdd on Dec 1^st, 2006, 12:18am

Hi im new to this forum although having used these products
for many years... thankyou!

using midiox yoke is fine for machines with easy interfaces

but

most people with a laptop esp the older ones and for stage
and live work
even some machines will have usb 1
even usb 2 isnt so good for multichain device and give 10 of miliseconds latency

and input simultanious midi streams

most of us have a spare com port
so i made a rs232 to midi converter the right way

i simply use two micro controller cores
to do the job of converting 38,400 baud to 31250 baud

instead of one micro always being tied up processing midi out or in
it forgets the other
if you see what i mean but the cpu uart doesnt and is basicaly
the same thing as a midi port
so you can see it was older interfaces were the problem
not drivers but hardware thinking

this is known as a paket lossy system

and this interface fixes it totaly
i notice 1ms latency driving sereral devices
and also midi input via keyboard
and also input addressing a software synth
in the midi out machine
from a laptop running a .mid file

i used the roland drivers and disabled multiport
i have plans to add this as many makers use it

maybe also rework the scheme to allow for 64 channels
via serial as 4 separate out sockets and 4 ins merged

look at this site

i will move this project to a band i know domain
and let them use it as they asked for it

so,,,,

http://www.edaboard.com/viewtopic.php?t=206631#733487

look here and its free

so enjoy....!

look thru the pages attached archive
and download the app to view the schematics
the main design graphic that shows
is the high end version
the device can be broken into in or out only
and built in 1hr using vero board

if you need any help or advice

simeon.webber@ntlworld.com ......... msn passport email
vsmvdd@edaboard.com ......... email box

youll find that you can use linux or windows drivers
ALL the drivers i tried worked first time
from most makers sites

as did the rest of the electronics and flash system

a pleasure to build this project
from start to finish