Forums > MaxMSP

Midi learning tools for max, help needed

Jul 30 2010 | 9:30 am

I just bought an electronic drumkit which i use to practice playing the drums.
I know a few high-end electronic kits who have some learning functionality like a metronome
or a rhythm gate. But i have a kit without this kind of functionality. So i thought it was nice
to try and build some max patches to support my learning. But because i am pretty new to max i would like some
help and or pointers.

Here is what I would like to build.

1: A metronome (tempo, 1/32,1/16,1/8 etc…) , I think i should be able to build this by myself.

2: I want some kind of patch which can compare my input midi notes against a predefined midi file.
and i want to see if i missed of hit the note (a bit like guitar hero ;)). I also want to be able
to define the accuracy. I think this is the part i need the most help with.

3: Midi gate. Just like number 2 but i only want to here a note when it is played correctly.

I guess i need the most help with part 2. Maybe you can suggest objects i can use or point me to patches which already do this kind of stuff. I already found the suivi object but i don’t need a note follower. So every tip or pointer is welcome!

Jul 30 2010 | 9:55 pm

Hi Retonator
I’ve been waiting to see if there were any responses to this question; nothing yet? The question you pose is exactly the type of thing Max is particularly good at so you’re in the right place. Can I suggest that, if you haven’t done so already, you look at the Max tutorials, esp those on MIDI and Data Handling. The individual helpfiles for every object in MaxMSP/Jitter are also very useful, as they contain examples of typical usage. Look at the helpfiles for midiparse, select, route, counter, timer and gate; also look at the [transport] object. In your Cycling74 folder there are also some very good examples (funnily enough, in a folder called……."examples"); I’m not in front of Max right now, so I can’t be more precise……..but i’ll have a look at this again when I am.

Jul 31 2010 | 1:27 pm

thank you brendan for replying. I think you are right and i am actually in the process of doing all the tutorials and looking at the examples. So i guess most of the things i can do myself. The only thing i think is a bit difficult is the accuracy thing. I want to define a certain accuracy in which the notes have to be played at the input compared to a midi file.

I thought about pre processing the midi file so that all notes are a percentage longer at the beginning and at the end.

Jul 31 2010 | 3:11 pm

One question I forgot to ask is, are you planning to use the patch for live midi input, or to process a pre-recorded midi file? In either case I think all you’re really asking Max to do is process a stream of midi note-numbers, determining when they are input and if they coincide with a predetermined ‘clock’, set to subdivisions of the main beat.
Besides the resources I suggested, this forum itself is also a vast repository of ‘received knowledge and wisdom’; use the search tool and look for terms or phrases such as "midi quantize" "midi timing" "transport" "time signature" etc.

Keep us informed of your progress

Jul 31 2010 | 3:39 pm

…one quick way to set your ‘timing resolution’ or accuracy is to use a [gate]: a ‘1’ message into left inlet opens the gate; also send that message to a [pipe] object, connected to a ‘0’ message (which closes the gate. The right inlet to [pipe] sets the delay time, and effectively lets you control how long or short the gate is open for; small values = tight accuracy, larger values = more forgiving.
Here’s a reeeeal basic patch:

-- Pasted Max Patch, click to expand. --

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