January 27th, 2011

Sequencer interface update

I updated the sequencer I showed in yesterday’s video. You can download the new version from the same URL:


In addition to giving a 8 x 16 drum grid to program beats, the sequencer also has 8 multisliders (effectively step sequencers) in it that you can use to send volume changes, filter messages, whatever. The slider step sequencers are mapped to CC 10 – 17. You can change which one you’re controlling using the slider in the upper right corner. BPM control is right underneath.

I posted an Ableton .als with the midi mapping all setup to control an Impulse (multisliders mapped to volume).


Unfortunately I uncovered a few bugs with the multislider widget. They’re fixed in this interface (I overwrote the slider widget javascript) for the most part, but a couple of the bugs will have to wait until the next app update.

Image of a step sequencer running in Control

8x16 step sequencer in Control


  1. great sequencer! how can i change the octave?

    Comment by KaKa — February 1, 2011 @ 9:56 pm
  2. Glad you like it! You’ll have to edit the script file… follow the instructions here to learn how to load scripts off your computer:


    At the top of the sequencer.js file there are a couple of lines like so:

    control.notes = [60, 62, 64, 65, 67, 69, 71, 72];
    control.noteNames = [‘C4’, ‘D4’, ‘E4’, ‘F4′,’G4′,’A4′,’B4′,’C5’];

    Just change these values to whatever you want and then load the file. Right now it’s designed to work with the Impulse instrument in Ableton…

    Comment by charlie — February 1, 2011 @ 10:04 pm
  3. you are so fast. I’m not involved in coding stuff therefore how can i set octave range changeable?

    Comment by KaKa — February 1, 2011 @ 10:26 pm
  4. The only way is via code… maybe when I release the next update I can try to include a version that lets you change the range with buttons. I guess if you need something before then I would try to change it in whatever program you’re using… Live, Logic etc. all have ways of changing MIDI pitches.

    Comment by charlie — February 2, 2011 @ 12:02 am

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