[Korg Wavedrum MIDIfied]

You Need something like a Manual RT-System so solve this. Are you familiar with RT-programming?

Not sure if I understand what you mean. RT as in Real Time? Which problem can be solved with it?

 

Ingo

[Korg Wavedrum MIDIfied]

Hi all,

 

just a heads up: I have uploaded the recent source code. It's still a mess :whistle: , but the DSP stuff is in there.

[Korg Wavedrum MIDIfied]

An other question did you try to use DMA with the ADC?

I cosidered using the DMA, but then the timer can not start the AD conversion automagically. At least I couldn't find out how. If anyone knows, I'm all ears :smile:

 

Ingo

[Korg Wavedrum MIDIfied]

Wow! Your documentation makes a fantastic read!

It leaves me wondering though, why did you use a Wavedrum at all?

What's left of its original functionality rather looks like a burden than a benefit, at your current point.

Wouldn't it be easier to use a common drum with some pickups?

Thank you for your kind words.

I used a Wavedrum because I had one :smile: .

What makes the Wavedrum a great instrument is that the sound created by physical modeling can be layered with the internal samples. But the choice of internal samples is quite limited, at least for the WD-X (Wavedrum Silver). But I have to confess, I haven't done much layering of the Wavedrum's internal sound with external samples (yet).

 

I too thought of building a stand-alone MIDI drum, maybe out of conga hardware, and adding a few cheap piezo disks...

 

Ingo

[Korg Wavedrum MIDIfied]

Hi MidiSaron,

I find in your dokuwiki that you use the AN10913 DSP library, i need it too.

How did you add it? in details, please...

BR

 

Got me! I promised to publish the code including the FFT handling as soon as I had tidied it up. But still haven't :sleep:

First, you need to add the DSP library to the makefile as described in the Wiki. Then, the header file has to be included in each C file which contains calls to the library functions:

#include "cr_dsplib.h"

I just copied the files cr_dsplib.h and libcr_dsplibFFT_cm3.a into the folder where my source files are.

Since the input signal for the FFT is real in my case (i. e. the imaginary part is always zero), every other number of the input array is zero:

	static s16 psi_Input[128];
	static s16 psi_Output[128];
	
	//fill input buffer for FFT
	for(i=0, j=0; i<BUF_SIZE; i++)
	{
		psi_Input[j] = buffer[i];	//real part
		j++;
		psi_Input[j] = 0;		//imaginary part
		j++;
	}

Then the FFT is computed just by calling:

	vF_dspl_fftR4b16N64(psi_Output, psi_Input);		//FFT is calculated HERE

Since I had a real (read: non-complex) input signal, only the first 33 bins psi_Output[0]...psi_Output[32] contain useful information.

 

Hope it's clearer now. If you have more questions, just ask.

 

Ingo

[Korg Wavedrum MIDIfied]

@TK:

Hi Thorsten, thanks for the warm welcome! A have a few older projects, most of them running an 8051 and written in assembly language. I will port some of them to MIOS for sure.

 

@Duggle:

Yes, it's based on MIOS of couse.

[Korg Wavedrum MIDIfied]

Hi all,

 

here's my first MIDIbox project:

http://www.midibox.org/dokuwiki/doku.php?id=korg_wavedrum_midification

 

I built a LPCXpresso board into my Korg Wavedrum WD-X, to MIDIfy it, and perhaps to enhance its user interface.

 

The source code is very much work in progress (in other words, it's a mess :rolleyes: ), but if anyone is interested, just drop me a line and I'll send it.

 

Comments welcome!

 

Ingo