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Mailist to discuss all issues regarding the Digitech GSP-2101 Guitar FX Processor

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Re: [gsp-2101] 2101Edit Program

2004-10-25 by Graham Pearson

Hi Jeff:
Martin Ecker wrote 2101Edit (version 1.1) back in 1999, when Windows 98 ruled. Unfortunately, his program does not operate reliably under more recent versions of Windows. Although you must have version 3.00 EPROMs to use 2101Edit, this does not guarantee its successful execution.
Because DigiTech did not release the specifications for the System Exclusive message used to transfer algorithms between the 2101 and a computer, Martin cleverly resorted to a "button-pressing" scheme. When you finish building an algorithm using 2101Edit, Martin's program sends a sequence of System Exclusive messages that simulate button presses. When receiving these messages, the 2101 thinks you are manually entering a new algorithm using it's front panel.
The main problem with this approach is that the 2101 needs varying "breathing" times between consecutive button presses. If you're not careful, it hasn't finished processing the last button press before another one comes down the MIDI cable and so the 2101 ignores it. This means that any subsequent button presses are out of sequence and the whole algorithm building procedure is jeopardized. You've tried long times (500 ms or more) between consecutive button presses, but I see this didn't help.
Another problem is that sometimes the 2101 interprets a single System Exclusive "button press" message as two button presses, and so again you're out of sequence.
We know of these problems because we tried to replicate Martin's scheme in our 2101 interface for our MIDIWizard software. The feature was not sufficiently reliable that we wanted to release it. I hope this explanation is not too long-winded for you. I just wanted you to know that its not exactly Martin's fault that his 2101Edit program is unreliable.
Keep in touch,
Graham Pearson
> -----Original Message-----
> From: Jeff [mailto:jeffb300z@...]
> Sent: Sunday, October 24, 2004 11:06 AM
> To: gsp-2101@yahoogroups.com
> Subject: [gsp-2101] 2101Edit Program
>
>
> Hi all, a a I recently discovered the editing program that lets you create new algorythems graphicly, on the pc, them dump them to the 2101. This is great. The algorythem creation ability was one of the reasons I wanted a 2101 in the 1st place, but then found it very dificult to do with the limited display on the unit.
>
> The 2101Edit program runs OK on my XP SP1 machine, but when I dump to my 2101, the unit doesn't make the changes I
> send. The furthest I get, is where it will ask me to store the preset which was being displayed at the time of the dump. I alsways end up back where I started - nowhere, and then usually the 2101 edit program locks up.
>
> I have tried tweaking the settings, like delaying the button push time by setting the paramiter in the 2101 edit
> program to the max of 4000ms.
>
> Has anyone had success with this program? Any tips?
>
> Regards,
> Jeff B.

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