Here are some comments from GNMIDI user to our product or work:

Email addresses and author names are here not public to safe their privacy, old urls were updated, all comments are from real persons who spoke free (usually in newsgroups or discussion forums, some wrote directly to us).

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Subject: Very talented
From: musician, composer, producer, demo user and maybe soon registered user
Guenter,
    You are a very talented being. I enjoyed listening to several of
your original pieces.

    I also downloaded your GNMIDI file. It works great. I have a friend
who owns a Technics keyboard. It reads Technics formats and SMF GM midi
file 0 formats. It also has the capability to play Technics format
karaoke files and display the words. A typical karaoke disk costs him
.oo USD with 8 to 10 songs. And the technics library is limited.
However  the keyboard will not read a standard karaoke file downloaded
from the net. So I searched the net and found your site. I converted
several midi files from .KAR to Midi 0 and popped them into his
Technics. They worked great. My friend was very impressed. Needless to
say you will have some future customers knocking on your doorstep.
From: registered user
Subject: GNMIDI registration
Thank you for the quick reply.  I am already using the software and I must
say you are a midi genius.  Very easy to use and very powerful.
From: New GNMIDI user
Subject: Midi File Time Signature Change
I'm actually less that a week away from having a surgery that's going to leave me unable to work for a few weeks. I was hardly able to talk my wife into letting me buy the license for the GNMIDI software!! Luckily, I was able to buy that, I actually just placed the order on your site. I love the software! It works really well and was just what I needed because Ableton has such poor midi export capabilities. I love the reverse midi song feature! 

I'll make due with the Karma M3 for now for time signature conversion. Thank you so much for offering to help me with it though! I will definitely keep this email archived and maybe contact you after things are back to normal.

Thanks!
Subject: R: Midi Type 0 o 1
Newsgroups: it.comp.musica.midi
https://www.gnmidi.com it is a place where he finds something of profit sure.
Subject: Re: (Q) how do I append two .mid files together?
Newsgroups: alt.binaries.sounds.midi.d
>Trying to take 2 MIDI songs and append one to the other so both songs
>play from one file.
>
>I've tried doing a DOS copy (using /b switch) and I've downloaded
>about 6 MIDI editors and none of them seem to be able to do this.
>
>(The DOS copy will only play the first song and disregard the appended
>one.)

https://www.gnmidi.com - check out GNMIDI (application runs under
Windows) and a whole collection of DOS-mode utils to do this and many
other MIDI manipulations.

  MIDI data files have a particular structure, including an "end of
song" at the end.  To append them, you have to modify the structure.
A sequencer able to open up two files at once should be able to do an
"append", by copying the entire data from one to the end of the other,
but you may get better control using a tool specifically for doing
this (as you want to make sure that all instrument settings, etc., are
properly made, that there is space for the break needed to set up the
new song, but not more space than needed (the safe space tends to be
around 2 4:4 measures, but for some files you can cut it shorter, if
the setup requirements are minimal, or the pieces can share them).

  Guenter Nagler has done a great job of creating useful MIDI tools,
and the software GNMIDI puts a lot of them together in an easy to use
Windows app.  You can do much of what it does with the DOS mode tools,
but it is much easier to use a mouse interface for it.
From: registered user
Subject: GNMIDI registration ...
Success now that I have managed to open the tool on a different computer! I
have tried GNMIDI today and it is marvellous, the notes transposition
feature and mute channel particularly. 

Thanks.
Subject: Re: How to make Midi mode 0 files.
Newsgroups: comp.music.midi
> I'm looking for a way to convert midi's into mode 0 files. That way I'll be
> able to make my own ringtones for my new mobile phone. Who can help me?

There's a utility at https://www.gnmidi.com that allows you to convert between
the formats. The GUI tool GNMIDI requires registering.
Newsgroup: uk.music.guitar
Subject:midi drums into separate tracks?

>>> Does anybody know of an easy way to take a midi drum track, and separate it 
>>> into the different components: snare, toms, hi-hats...
>>> I can do it manually but it's a pain. I'm sure somebody has an easy way to 
>>> do it.

>> I know that cakewalk software can use a 'CAL' script to do this (basically 
>> and automation type thingy). But other than that I can't help you. Maybe 
>> somwone has written a script for your sequencer of choice. Also have a look 
>> on Hitsquad Shareware Music Machine site to see of someone has written a 
>> drum program to do this. http://www.hitsquad.com/
>> 
>> Other than that, you might well be stuck with the old copy and paste routine 
>> I'm afraid :(

> There are some utilities at https://www.gnmidi.com/ which may help you

I found there just what I needed, it works great!
I can't believe I was doing it manually :-)
Subject: Urgent - Registration
From: demo user
Hello,
please, how can I do for registration.
Send me details.
thank you.

Answer:
Go to web page https://www.gnmidi.com/gnorderen.htm and choose the progducts that you want to order. 
Payment will be done by company Share-it using paypal or credit card or bank transfer.
Subject: new user
From: registered user
Dear Gunter,
I am very pleased with GNMIDI I use a Solton X1 and Ketron SD1 and find 
the chord analyser very good.
From: registered user
Subject: oky web
Yesterday i bought your programme GNMIDI     it looks very good to me,
But i have one question to you, before i go to study the whole manuel.

How can i come in contact via your side with other people who
have a okyweb karaokefile player,and want to put in the short chords in 
the song, so that i can have a little conversation about the best way to 
do it,for the oky web.
This is from the italian producer M-live    wordbox.

Thanks in advance for your answer,or advise.
PS: GNMIDI (great programme)

Answer: it is not possible via GNMIDI side to find other oky web users.
Use newsgroups and forums about midi, there you might find other users with similar
equipment who help each other.
Subject: Re: Easy Midi edit tool
Newsgroups: alt.cellular.nokia.ringtones, alt.music.midi
> I use Anvil at the moment, it works perfect. Except I can't find the option
> to delete a part of the midi. Anvil can only delete from the selected point
> to the start or end.
>
> What should I use to edit midis?

Goto https://www.gnmidi.com coolest little midi tool out there and very 
inexpensive.
Subject: Re: splitting channels
Forum: comp.music.midi
The Casio uses MIDI format 0  which is all channels on one track.  Cubase
should convert 0 to 1 which is channels split out to tracks but if it
doesn't then get GNMIDI from https://www.gnmidi.com --you should have it
anyway for serious midi -- best damn midi tool ever made.
Subject: Re: GNMIDI
From: registered user
Thank you for responding to my email complimenting you on GNMIDI.
I am not a savvy computer user and certainly not a software engineer 
so my comments are based as an observer and user only.

The experience I have had with GNMIDI was so positive I had wanted to let you know.
Specifically I appreciate the simple, yet elegant, operation of the program 
through the icon menu. The "Tips" is very clever and useful. 
Your documentation was thorough. I've only begun to unlock the potential.

I use GNMIDI to help with my Yamaha Dislavier ( DGA1 ) in manipulating various 
MIDI files so that I can use with the piano.
In combination with the Yamaha S-YXG50 Soft Synthesizer ( to test play ) and 
the Giebler Enterprises Yamaha Diskette Manager and a set of freeware utility 
programs called "dkvutils" I have had great success.

Once again, thank you for a very good and helpful program.
I suspect that a great deal of time and effort went into developing 
GNMIDI and it is appreciated !
From: registered user
Subject: Re: Upgrade
it works great. Thank you very very much for such a wonderful 
product and such good service.

more comments ...

You find information and a demo to this software at https://www.gnmidi.com.