jsynthlib-devel

[Jsynthlib-devel] Making a Patch for Roland Kit on the HPD-15?

[Daniel R. <dr....@co...>]

Hello all.

First off, thanks to those who responded to me privately, who probably meant
to reply to the list. The answer to my last questions were "set the
checksumOffset, start, and end values." That worked.

So now I've advanced quite a bit in my HelloWorld, and now I have the
following code

        super.trimSize = 16;
        super.checksumOffset = 14;
        super.checksumStart = 6;
        super.checksumEnd = 13;
        byte[] first = new byte[] {
                (byte)0xF0,                         // It's a MIDI System
exclusive message!
                0x41,                               // Roland ID
                0x10,                               // Device ID 17 (minus
one)
                0x00,0x2E,                          // Model ID 2E for
HPD-15
                0x12,                               // Command ID (this is
data set, could be a request 0x11)
                0x01,0x00,0x10,0x00,                // the offset for the
user kit, pad A1
                0x00, 0x00, 0x07,12,                // the nibbled data for
the shekere 124
                (byte)0xFF,                         // checksum will go here
                (byte)0xF7                          // end
        };

which works perfectly for ONE parameter change (I'm amazed. I had never
nibbled before :). But now I want to send an entire kit (pads A1, A2, etc.).
I've tried the two obvious things, making two sysexs back to back (they get
trimmed to one, otherwise the checksum would be calculated just once). I've
also tried putting in more than one offset and data (message was received
but didn't do the right thing).

I can send more than one sysex message, but I imagine there's a better way.

Thanks in advance for your help!

Best,
Daniel

Re: [Jsynthlib-devel] Making a Patch for Roland Kit on the HPD-15?

[Robert W. <wi...@op...>]

Hello Daniel,
further action depends perhaps on your sysex device implementation.  
If there is a sysex which changes several parameters, then use it.  
Otherwise, there is no other possibility then sending several sysex  
messages at a time. It requires to write your own sendPatch(Patch)  
method. I did the same in my Roland JD800 driver  (JSynthLib/ 
synthdrivers/RolandJD800/RolandJD800SinglePatchDriver.java).,
Robert.


On Dec 22, 2007, at 2:42 AM, Daniel Rosenstark wrote:

> Hello all.
>
> First off, thanks to those who responded to me privately, who  
> probably meant
> to reply to the list. The answer to my last questions were "set the
> checksumOffset, start, and end values." That worked.
>
> So now I've advanced quite a bit in my HelloWorld, and now I have the
> following code
>
>         super.trimSize = 16;
>         super.checksumOffset = 14;
>         super.checksumStart = 6;
>         super.checksumEnd = 13;
>         byte[] first = new byte[] {
>                 (byte)0xF0,                         // It's a MIDI  
> System
> exclusive message!
>                 0x41,                               // Roland ID
>                 0x10,                               // Device ID 17  
> (minus
> one)
>                 0x00,0x2E,                          // Model ID 2E for
> HPD-15
>                 0x12,                               // Command ID  
> (this is
> data set, could be a request 0x11)
>                 0x01,0x00,0x10,0x00,                // the offset  
> for the
> user kit, pad A1
>                 0x00, 0x00, 0x07,12,                // the nibbled  
> data for
> the shekere 124
>                 (byte)0xFF,                         // checksum  
> will go here
>                 (byte)0xF7                          // end
>         };
>
> which works perfectly for ONE parameter change (I'm amazed. I had  
> never
> nibbled before :). But now I want to send an entire kit (pads A1,  
> A2, etc.).
> I've tried the two obvious things, making two sysexs back to back  
> (they get
> trimmed to one, otherwise the checksum would be calculated just  
> once). I've
> also tried putting in more than one offset and data (message was  
> received
> but didn't do the right thing).
>
> I can send more than one sysex message, but I imagine there's a  
> better way.
>
> Thanks in advance for your help!
>
> Best,
> Daniel
>

Re: [Jsynthlib-devel] Making a Patch for Roland Kit on the HPD-15?

[Daniel R. <dr....@co...>]

Hi Robert,

Thank you so much for your answer. In the days since I wrote my message, I
kept fiddling and ended up sending several sysex messages with a 40ms delay
between each. The biggest problem since then was that the Handsonic said
there was a Midi buffer overflow when in fact I had the checksum wrong for
the subsequent sysex messages. Now it all works.

Never thought I'd be doing this byte-level stuff (and liking it :).

Now I have to decide if what I want to write is really a JSynth driver or
rather a Handsonic controller that does not even use JSynth (i.e., something
like this
http://www.ex5tech.com/ex5ubb_cgi/ultimatebb.cgi?f=6&t=000145&ubb=get_topic).
I thought JSynth would handle the tricky bits, but it turns out that the
javax.sound.midi package handles the hard parts, JSynth structures them in a
particular way, and then I have to write the interaction with the Handsonic.
At the risk of reinventing the wheel I think that doing the structure myself
might be more to the point of what I want to do.

Thank you again for all of your help,
Daniel

On 12/24/07, Robert Wirski <> wrote:
>
> Hello Daniel,
> further action depends perhaps on your sysex device implementation.
> If there is a sysex which changes several parameters, then use it.
> Otherwise, there is no other possibility then sending several sysex
> messages at a time. It requires to write your own sendPatch(Patch)
> method. I did the same in my Roland JD800 driver  (JSynthLib/
> synthdrivers/RolandJD800/RolandJD800SinglePatchDriver.java).,
> Robert.
>
>
> On Dec 22, 2007, at 2:42 AM, Daniel Rosenstark wrote:
>
> > Hello all.
> >
> > First off, thanks to those who responded to me privately, who
> > probably meant
> > to reply to the list. The answer to my last questions were "set the
> > checksumOffset, start, and end values." That worked.
> >
> > So now I've advanced quite a bit in my HelloWorld, and now I have the
> > following code
> >
> >         super.trimSize = 16;
> >         super.checksumOffset = 14;
> >         super.checksumStart = 6;
> >         super.checksumEnd = 13;
> >         byte[] first = new byte[] {
> >                 (byte)0xF0,                         // It's a MIDI
> > System
> > exclusive message!
> >                 0x41,                               // Roland ID
> >                 0x10,                               // Device ID 17
> > (minus
> > one)
> >                 0x00,0x2E,                          // Model ID 2E for
> > HPD-15
> >                 0x12,                               // Command ID
> > (this is
> > data set, could be a request 0x11)
> >                 0x01,0x00,0x10,0x00,                // the offset
> > for the
> > user kit, pad A1
> >                 0x00, 0x00, 0x07,12,                // the nibbled
> > data for
> > the shekere 124
> >                 (byte)0xFF,                         // checksum
> > will go here
> >                 (byte)0xF7                          // end
> >         };
> >
> > which works perfectly for ONE parameter change (I'm amazed. I had
> > never
> > nibbled before :). But now I want to send an entire kit (pads A1,
> > A2, etc.).
> > I've tried the two obvious things, making two sysexs back to back
> > (they get
> > trimmed to one, otherwise the checksum would be calculated just
> > once). I've
> > also tried putting in more than one offset and data (message was
> > received
> > but didn't do the right thing).
> >
> > I can send more than one sysex message, but I imagine there's a
> > better way.
> >
> > Thanks in advance for your help!
> >
> > Best,
> > Daniel
> >
>