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 Forum index » DIY Hardware and Software » Arduino
Another Sequencer (for drums)
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bubzy



Joined: Oct 27, 2010
Posts: 553
Location: United Kingdom
Audio files: 62

PostPosted: Tue Jan 14, 2014 6:39 am    Post subject: Another Sequencer (for drums) Reply with quote  Mark this post and the followings unread

hello again....

after almost completely giving up on my other sequencer, I have decided to start again but with a more simple idea, this is a 4 gate out drum sequencer, it has tempo setting, shuffle, and random population options, the steps are programmed using buttons to turn them on or off, there is a cycling LED that will show the current step. step length can vary from 1 to 64 steps per gate, so gate 1 can have 8 steps, gate 2 can have 14 steps, gate 3....... you get it. this can allow for some interesting rhythms. there is currently no option to vary the length of the gate out, other than to have a lower BPM, I don't know if this is necessary, as if it was REALLY important, you could use this device to trigger an adsr with a longer time on it.

anyway, heres the current incarnation.


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capicoso



Joined: Nov 19, 2012
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Location: Argentina

PostPosted: Wed Jan 15, 2014 1:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cool Smile
Will you add more features or is it done?
My sequencer has the option to vary the gate time, but i also found it a bit useless. I then put a switch to select gate or trigger, just that.

What happened with the other sequencer?
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bubzy



Joined: Oct 27, 2010
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PostPosted: Wed Jan 15, 2014 1:54 pm    Post subject: Reply with quote  Mark this post and the followings unread

the other one got very complicated, I lost a massive chunk of the code and got disheartened, I may revive it sometime, but got a load of other stuff on the go at the moment Very Happy thanks for the interest.
I don't think it will have any other features, im considering a reverse function although I don't know how useful that would be Very Happy

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capicoso



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PostPosted: Wed Jan 15, 2014 4:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

ouch...


that's fine, if we keep adding features it'll never end... The only thing i could think that would be cool is the option to save patterns
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bubzy



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PostPosted: Thu Jan 16, 2014 2:14 am    Post subject: Reply with quote  Mark this post and the followings unread

yeah I thought about that, but then theres not a logical way to display it, and im out of pins for I2C :/
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bubzy



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PostPosted: Thu Jan 16, 2014 9:57 am    Post subject: Reply with quote  Mark this post and the followings unread

made the front panel today


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bubzy



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PostPosted: Thu Jan 16, 2014 4:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

added some doodles to the panel. its all in white so its difficult to photograph :/


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roglok



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PostPosted: Fri Jan 17, 2014 1:39 am    Post subject: Reply with quote  Mark this post and the followings unread

nice sequencer and a lovely panel, richard!
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bubzy



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PostPosted: Sun Feb 02, 2014 4:48 pm    Post subject: Reply with quote  Mark this post and the followings unread




here is the "finished" version (is DIY stuff ever complete)?

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scriptstyle



Joined: Jan 22, 2008
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PostPosted: Sun Feb 02, 2014 5:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

this is cool are you going to post the sketch?
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bubzy



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PostPosted: Mon Feb 03, 2014 2:12 am    Post subject: Reply with quote  Mark this post and the followings unread

I'm not sure at the moment, this would mean I would have to get the schematic up to date and everything, then answer questions like "why isn't this working" Very Happy ill consider it over the next couple of weeks (it still needs some tweaks anyway)
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PHOBoS



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PostPosted: Mon Feb 03, 2014 6:16 am    Post subject: Reply with quote  Mark this post and the followings unread

looks great bubzy! thumleft I like the green LED's on 4th steps. And I'm curious about how you did the shuffle function, it sounds very good.
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bubzy



Joined: Oct 27, 2010
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PostPosted: Mon Feb 03, 2014 6:40 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Phobos Very Happy
shuffle took a while.
basically its this

Code:
//pseudocode assuming "shuffle" is switched on.

boolean shuffleState ;

if(shuffleState)
{
add shuffle interval to "beat"
shuffleState = !shuffleState
}

else if(!shuffleState)
{
subtract shuffle Interval from "beat"
shuffleState = !shuffleState
}

//where "beat" is the interval between steps
}
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bubzy



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PostPosted: Mon Feb 03, 2014 10:48 am    Post subject: Reply with quote  Mark this post and the followings unread

here it is in the box with (some of) the modular Very Happy


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