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Messages - shabbee

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Odytron / Re: glitchy response when sending MODULATION messages
« on: April 05, 2017, 10:48:35 PM »
 :D :D :D

Hi Paul,

Much better now with V1.2

Many thanks


Odytron / Re: glitchy response when sending MODULATION messages
« on: April 01, 2017, 10:06:41 AM »
Hi Paul

Just wondering if you sent the beta? Haven't seen anything in my inbox.



Odytron / Re: glitchy response when sending MODULATION messages
« on: March 24, 2017, 05:59:52 PM »
Hi Paul,

That would be great, if you could email it to me I'll let you know how I get on.



Odytron / glitchy response when sending MODULATION messages
« on: March 20, 2017, 05:07:24 PM »
Hi Paul,

I wonder if you have noticed when sending MOD messages over MIDI to ODYTRON that the response is rather glitchy as the MOD level increases? The behaviour is the same as increasing the LFO MOD depth using the value slider suggesting it's not a MIDI issue. In addition, sending a lot of MOD data can cause the value LED to light up and remain lit but this is quite intermittent.

I have uploaded the new firmware but has made no difference.



miniAtmegatron / Re: Incompatible Uno ??
« on: June 07, 2016, 09:36:59 PM »

I burned the bootloader and the synth appears to be ok with the new 328P. I have another clone with the surface mount 328, this is not right so can only assume the chip is a clone of some variety. Seems to behave like an uno for the simple things buy guess it ain't up to digital synthesis.  I've ordered genuine arduino today so I have a reliable reference.

miniAtmegatron / Re: Incompatible Uno ??
« on: June 07, 2016, 02:36:40 PM »
Completely agree, this is what I'm finding, I learned about the LGT8F88A today. After spending 90 minutes trying to burn a bootloader into the net ATMEL328, when the device ID came back as 000000 got me thinking about fakes. For the time wasted trying to resolve problems the genuine arduino is money well spent. I just need to figure out how to skip the id check (something about adding -F) and see what happens then but I may find I still have audio issues. 

Thanks for your support

miniAtmegatron / Re: Incompatible Uno ??
« on: June 06, 2016, 07:41:15 PM »
As far as I can see, the microprocessor is genuine, the pcb is not though hence my struggle to understand why there is an issue.

miniAtmegatron / Incompatible Uno ??
« on: May 14, 2016, 05:42:13 PM »
I have a Uno clone with an odd symptom.  When I adjust the filter most of them result in the sound breaking up and distorting really badly to the point that audio becomes silent. With another board (clone that uses a surface mount processor) it all sounds fine. I have verified the A/Ds are working on all ports so not sure why this is. My reason for posting is to make people aware. If I solve it with a new processor I will let you know. If anyone else has seen this and fixed it pls let me know

miniAtmegatron / Re: multiplex signal to replace S6
« on: March 15, 2016, 11:55:41 PM »
Hi Paul,

Thanks for the reply, I may not have explained my plan clearly so want to add a bit more detail.

Assuming the filter Q and cutoff as an example, The wiper of each pot is connected to its own 4066 analog switch, I'm looking to control each 4066 switch from D2 (currently play switch) as suggested but with an inverted clock to one to enable switching between the 2 pot wipers.The outputs of both 4066 switches will be connected to the same A input of the UNO. I will use the same clock signal to replace the slide switch signal emulating either state of the switch. I'm hoping this approach will minimise the amount of code I need to change as I'm very new to that side.

I'm guessing/hoping I only need to make changes to MinHardware?

Does this correspond with your post above?


miniAtmegatron / multiplex signal to replace S6
« on: March 08, 2016, 11:19:47 PM »
I'm trying to edit the code so that I can have 12 pots instead of the 6 with the little slide switch to change between functions. The hardware is no problem but as I'm just learning Arduino I'm struggling with the software.

I've tried to add the blink sketch lines to the miniatmegatron.ino so that D1 is sending out a clock pulse to control the multiplexing hardware. As you probably guessed this doesn't work as I get no signal when I scope D1. I'm convinced D1 is possibly defined elsewhere in the miniatmegatron code thus cancelling my setup and loop function, but I have no clue. I've also noted that the slower the clock frequency this interrupts the running of the miniatmegatron, my conclusion is that my approach is very lame and crude.

If I upload the blink example sketch alone, I can see the clock function working ok.

I need some pointers as my only option is to build a clock generator but I'm hopeful to the skilled programmer this would be an easy  piece of code to write. I'm also mindful that I may need some additional debounce for when then pots are read but one step at a time!

Thanks for reading and any help

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