TG33 MIDI buffer full - illegal data

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V50fan
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TG33 MIDI buffer full - illegal data

Unread post by V50fan » Tue Jul 17, 2012 3:00 pm

When trying to dump sysex soundbanks or single sounds to my TG-33 i always get this two messages: "Error - Illegal Data" and then "MIDI buffer full"
However, only with my Atari emulator Steem it goes ok, but then requesting a sound or bank to the computer goes wrong.

What can i do about this? I already tried another Midi-port with no result.



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Clyde
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Re: TG33 MIDI buffer full - illegal data

Unread post by Clyde » Tue Jul 17, 2012 10:47 pm

Are you running your Atari emulator on a modern computer that has a CPU rated at multiple gigahertz? If so, that may be your problem. When the TG33 was designed, computer CPUs ran at a megahertz speed rating, thus midi buffers and ram were designed to work within those parameters. Often when you run midi data to one of these old synths on a gigahertz rated CPU, the synth can't clear the midi buffer as fast as the incoming data, so it fills the buffer and gives you a midi buffer full error message. Some programs like Midiox allow you to slow down sysex transmission to accomodate older synths and overcome this issue.
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Re: TG33 MIDI buffer full - illegal data

Unread post by V50fan » Wed Jul 18, 2012 6:54 am

Yes, i have a 3ghz duocore PC. Were can i slow down midi-communication in MIDI-ox?



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Re: TG33 MIDI buffer full - illegal data

Unread post by Clyde » Wed Jul 18, 2012 11:39 am

You'll have to have a Midiox user fill in the details for you, I have not used a computer with keyboards in many years. This issue happens often enough that I've seen people post the solution many times about slowing down the transmission of data.
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Re: TG33 MIDI buffer full - illegal data

Unread post by synthjoe » Sun Jul 29, 2012 6:21 pm

Go to View/SysEx... then Sysex/Configure... on the resulting window. 'Delay' and 'Delay after F7' are the parameters that allow you to insert break between data bytes/packets. I don't think there's any use in going above a few 100 ms, but YMMV - experiment. Help is pretty good in explaining what the individual parameters on that screen do.



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Re: TG33 MIDI buffer full - illegal data

Unread post by Clyde » Mon Jul 30, 2012 2:26 am

Synthjoe, many thanks for posting that tip!
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Re: TG33 MIDI buffer full - illegal data

Unread post by tb323 » Mon Jul 30, 2012 7:32 am

I had the same problem with my TG33. The only thing I had to do was to increase the buffer size to more bytes than the sysex message has which is 592 bytes. Seems like it doesn't like multiple parts. :)



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Re: TG33 MIDI buffer full - illegal data

Unread post by V50fan » Tue Jul 31, 2012 6:11 pm

Well thanks guys, works now! :D



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Re: TG33 MIDI buffer full - illegal data

Unread post by Clyde » Tue Jul 31, 2012 11:04 pm

Isn't it great when other forum members post possible solutions that solve our issues? That is the great thing about our forums here!
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Re: TG33 MIDI buffer full - illegal data

Unread post by synthjoe » Wed Aug 01, 2012 10:03 pm

So, what did you change to make it work? The details might be useful to others at some later point in time...

Glad you're sorted! :)



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