KIT AVAILABLE !!! All In One PCB Kit to sell !!!

[slayer666]

If the pads are too hot there might be a problem with MUX IC "saturation" and as ignotus said the best solution would be to put a trim pot between a sensor and an input to limit input signal. Having said that, you may try this firmware

megadrum32_20_32_20080309.hex

It may fix the problem of over spilling or or it may not. But if the input signal is too hot you will still loose dynamic range.

I don't have a parallell port on my motherboard. Other options?

[dmitri]

If the pads are too hot there might be a problem with MUX IC "saturation" and as ignotus said the best solution would be to put a trim pot between a sensor and an input to limit input signal. Having said that, you may try this firmware

megadrum32_20_32_20080309.hex

It may fix the problem of over spilling or or it may not. But if the input signal is too hot you will still loose dynamic range.

I don't have a parallell port on my motherboard. Other options?

See this if Atmega came with a bootloader. Warning, if the procedure is done incorrectly you may loose pre-programmed firmware and you will have to use ISP cable.

[Synthex]

ok, but can you reproduce my "problem"?
Only 1 piezo attached
only lcd
No keyboard.
Megadrum Default settings.

Yes, I can reproduce the "problem".
I do the test with MAX4558 and CD4051, the problem is the same ...
I will test the last firmware ...

[slayer666]

ok, but can you reproduce my "problem"?
Only 1 piezo attached
only lcd
No keyboard.
Megadrum Default settings.

Yes, I can reproduce the "problem".
I do the test with MAX4558 and CD4051, the problem is the same ...
I will test the last firmware ...

Good, I'm working on my keyboard now. I noticed that the keyboard uses 4pins in the schematic, but on your design it has 5pins? What's up with that?

[Synthex]

KeyBoard.gif

[slayer666]

If the pads are too hot there might be a problem with MUX IC "saturation" and as ignotus said the best solution would be to put a trim pot between a sensor and an input to limit input signal. Having said that, you may try this firmware

megadrum32_20_32_20080309.hex

It may fix the problem of over spilling or or it may not. But if the input signal is too hot you will still loose dynamic range.

I don't have a parallell port on my motherboard. Other options?

See this if Atmega came with a bootloader. Warning, if the procedure is done incorrectly you may loose pre-programmed firmware and you will have to use ISP cable.

How do I upload the firmware with midiox if the firmware is in hex format?

[Synthex]

How do I upload the firmware with midiox if the firmware is in hex format?

A MegaDrum firmware file must be modified slightly: three bytes, 0xF0 0x7F 0x40, must be prepended and one byte, 0xF7, must be appended and rename the *.hex file to *.syx

[slayer666]

How do I upload the firmware with midiox if the firmware is in hex format?

A MegaDrum firmware file must be modified slightly: three bytes, 0xF0 0x7F 0x40, must be prepended and one byte, 0xF7, must be appended and rename the *.hex file to *.syx

How do I modify it?

Please explain how you do it step by step.. I don't want to mess up as I don't have a parallell port.

[Synthex]

Here is the file (you can compare it).

[slayer666]

Here is the file (you can compare it).

The update went smooth, but how do I modify hex ?