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Messages - rio

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As I am still thinking of hanging 2 Atmegatrons directly to 1 FX pedal, I wanted to ask, for example, how high the output impedance of the Atmegatron is.

Can a "T-pad attenuator" be installed in a cable as described here:
How high must R1, R2, R3 be calculated in order not to damage the equipment and obtain good signal quality?
The input impedance of the FX device is 1 Mohm.

Thank you and Greetings!

Hi paul,

please, can you tell me how high the current consumption (mA) of the Atmegatron/Odytron is? Thanks.


Everything else / Re: Post your songs!
« on: July 16, 2018, 10:21:42 PM »
Great tune ;) can also push it up on soundcloud - if you like.

PS: the credits are 8) !

Greetings, rio

Everything else / Re: Post your songs!
« on: July 13, 2018, 08:29:03 AM »
OK - Great. I'll listen to it in my studio this evening ... cool that you always technically explain your stuff ;)

I now use various delays in my setup too (uploading a picture of my setup would probably not a bad idea :) - even composing a new song :o) ... One of the delay is analogue - others are emulating the analog sound. Thus I have a delay behind each of atmegatron and odytron ... but these are used wisely;)


ok thanks, for your great explanation...

ok, it looks like they are: "Cutoff", "Reso", "Filter LFO":

1. So can I use "Alps RK12L12C0A0E" as a replacement? - they have 15A taper -> they are logarithmic - Are you sure? I ask, because the 3 others are linear.

2. For the boost poti: I don't find Bourns PTV09A-1025F-B102  --> only PTV09A-4225F-B102 (can I take these as replacement therefor?)
they are linear, right?

PS: With that middle number 1025F, I can only find these "logarithmic" ones: "PTV09A-1025F-A203" <--- but these are not the right ones, right?

Please, I need more details about these both potentiometer types...


I think ALPS RK09D1130C2P should fit.

The 6 potentiometer at the top are all the same, right?
What are the "values/parameter" for the volume and boost potentiometers?

Greetings, rio

ok thx.


Hi paul,

Can you tell me which potentiometer is used for the distortion (which is on the far right)?
That Potentiometer is scratching a bit with me. Maybe I like to replace it.

Is it "Logarithmic" or "Linear"? Please, can you tell me the resistance value, the shaft-height in mm, the type (pin count, identification/product/model number)?
thank you.


Everything else / Re: Post your songs!
« on: June 22, 2018, 11:39:26 PM »
hey ToyKeeper,

after I could hear the songs in peace at home :D - here are some thoughts about it:

easy does it draft 1:
  these are really nice lead sounds and melodies that you created there. The recording sounds a bit overdriven, but maybe it was your intention. Personally, I think it would sound better, if not so distorted - especially in the bass area, there is a lot lost by that. You can certainly rasp at one point or another, otherwise thats quite passable... I would cut it a bit more. The combination of the bass melody with the lead sounds is really cool ...

digitest 1: is the arpeggio sound by atmegatron? it sounds nice melodic ... although the part is quite strong. the other sounds in the background are not bad either;) not misunderstand me - I really like both tunes;)

Everything else / Re: Post your songs!
« on: June 20, 2018, 08:22:41 AM »
Well, as it turns out, dragging my feet was an understatement.  I still haven't gotten back to it, months later.


I've spent most of my music time lately looking for a better way to do midi sequencing, so I can capture ideas while exploring and then clean them up for a more organized render later.  And I just got a Digitakt to help with this, and to serve as a drum machine.  Hopefully it'll help me stop dragging my feet and actually get some songs done.

yeah ..for sure, that's important.

I really like the combination of Atmegatron and Microbrute, retro digital plus retro analog in a single dirty sound.

post a picture !

I really have to listen here under bad conditions at work, but what I have listen so far sounds fantastic (both songs)!
I have to listen to this at home ;)

Greetings, rio

Everything else / Re: Post your songs!
« on: February 12, 2018, 08:20:44 AM »

thx :D
The song is stored in the hardware sequencer, which uses a few more instruments of various devices, which I then recorded live.

I'm not entirely sure whether the lead in a middle section was a processed Atmega or something else though.

Part C is definitely the SID part. But there, the phase of the two channels could be better. The SID instrument is a sync + ring modulation.
Part D starts with Atmegatron lead...,  Part b/B starts with odytron rhythm. The Arps are all from a second SID board.

And though the notes seemed at first to be missing, it worked as a nice effect when D came back later.

I think I wanted to let a little air there ;)

I've been dragging my feet on a song lately.... Hopefully I'll finish the song soon so I can put it online.

I'm curious, I want to hear it ;)

I laid out a structure with the bass line and then tried to put other stuff on top.

That's fine. I think I always start with the beats (which could also be a bit more varied) and then I work on the bass and back to the beats.
It often happens to me that some parts are a bit too stiff, a little more variation could make the thing even more lively. I forget to granulate the parts even more. .. and what I unfortunately do not use enough are my two old speech synthesizers!

Greetings !

Everything else / Re: Post your songs!
« on: February 07, 2018, 08:18:21 AM »
here is my first tune, where the odytron sets the rhythm and Atmegatron plays the melody - regardless of any other instruments I used for that song (SID, 303, virus, p2k).

Greetings ;)

Atmegatron / Re: CC for Volume
« on: January 19, 2018, 10:50:56 PM »
Hi the function to call is in: 

You need to set a value for EnvLevel.  You can do this in the CC list in the normal place in the engine (AtmEngine::midiControlChangeReceived).  However you'll have to call the amplifier directly, not via the patch.  Also ... be warned, by setting the volume digitally  you are changing the bit rate of the sound.  So if you set the bit rate to half, you're changing the 8 bit sound to a 7 bit more.  Halve it again and it's a 6 bit sound.

It's how the miniAtmegatron works, but I didn't think it was suitable for the full Atmegatron, hence the analogue pot.

Would it be possible the "use of CC 7 for Volume" to implement in the option page (regardless of bit lossness)?


Atmegatron Librarian / Re: Atmegatron librarian CPU usage
« on: January 04, 2018, 08:10:17 AM »
Hey paul,

Thanks for all support (the firmware updates are great!), but I wanted to ask again, if there is any news on the mentioned librarian bug? Many Thanks & Good succeed.

Best regards, rio

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