Tag: Max/MSP

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Max Twitter client using ruby

Send and receive Tweets using Max via OSC to a background ruby server.

An advantage of this method is that both the patch and the server are  compact and easy to understand. The Max patch does things in a Max way. And likewise with the ruby scripts.

download

https://github.com/tkzic/internet-sensors

folder: twitter-ruby

files

Max
  • twitter-client.maxpat
ruby
  • twitter-server-send.rb (for sending Tweets)
  • twitter-server-get.rb (for receiving Tweets)
ruby gems

The ruby script requires installation of the following gems

  • json
  • osc-ruby
  • twitter

For example:

# sudo gem install twitter




Twitter authorization


In addition to having a Twitter account, you will need to set up a Twitter application from the developer site here:


https://dev.twitter.com/apps


Good instructions on how to do this can be found in this stackoverflow.com post under this heading: So you want to use the Twitter v1.1 API?


http://stackoverflow.com/questions/12916539/simplest-php-example-for-retrieving-user-timeline-with-twitter-api-version-1-1


When you get to step 5 – in the instructions – instead of writing your own code, just use a text editor to copy your access tokens into these ruby programs:


    

  • twitter-server-send.rb
    • 

  • twitter-server-get.rb
    • 



Replace the strings in this line of code by copying and pasting the appropriate ones from your Twitter application:








twitterClient = Twitter::REST::Client.new do |config|
  config.consumer_key = "mqQtoYh16343tDFG3BK7QQ"       
  config.consumer_secret = "X0KexjlK49fhhrnn9EztapZfATCQqWCc5fXVJH2pE"      
  config.oauth_token = "205589709-5krgh9FR3KkLGRDnewiU7GKKBMA6i2La84c"       
  config.oauth_token_secret = "LNARAeooN2vkklkF006GRdihQ5D8YYkm8dYvEs68M"  
end






Yeah – its cryptic, but trivial compared to writing the ouath code. Just a reminder, if even one letter or quote mark, or anything is out of place, the authorization will fail.






instructions


(note: currently running with ruby version 2.0) Display your ruby version by typing: ruby –version


Sending Tweets


    

  • Open the Max patch: twitter-client.maxpat
    • 

  • In a terminal window run the ruby script:
    • 





# ./twitter-server-send.rb






    

  • In the Max patch, type in a Tweet. Press the green button to send. 
    • 



    

  • When you have tweeted enough, end the ruby server program by typing <ctrl-c>
    • 



 Receiving Tweets


    

  • Open the Max patch: twitter-client.maxpat
    • 

  • In a terminal window run the ruby script:
    • 

  • From Twitter, send a Tweet to the user name embedded in the server
    • 





# ./twitter-server-get.rb




Both ruby servers can run at the same time.


What’s next?


    

  • Parse incoming Tweets into various components
    • 

  • Combine the 2 Ruby servers
    • 



revision history


    

  • 5/21/2014 – refactored app names. Added receive server
    • 

  • 5/19/2004 – moved to twitter-ruby folder
    • 

  • 1/18/2014 – minor fixes to ruby server for current ruby version 2.0
    • 

  • 9/7/2013 – uses oauth to communicate directly to Twitter from ruby
    • 


	


	





		

		
Posted on 
Adam Rokhsar’s Max frame subtraction example
	


	
	

		
Uses video frame subtraction in jitter to control playback of audio clip.




download


https://github.com/tkzic/max-projects


folder: frame-subtraction


patch: frameSubtraction_example.maxpat


You will also need an audio file: aiff, wav, etc., to load into a Max buffer.


dependencies


You will also need the cv.jit library (computer vision): http://jmpelletier.com/cvjit/


Add the location of these files to your path in Max using Options | File Preferences.


Note: When I loaded the patch in Mac OS 10.8 – the computer automatically downloaded and installed Java updates.


instructions


    

  • Load an audio file for playback
    • 

  • Try setting minimum summed pixels to 150,000 or less for greater effect – depending on amount of light in the room
    • 




	


	





		

		
Posted on 
Send Tweets with a Little Tikes piano
	


	
	

		


This project uses the Max fzero~ object to detect which key of the piano gets pressed and send a pre-written Tweet like “Signs point to yellow” based on the color of the key.


It works with the Internet sensors project that sends Tweets from Max using Ruby. https://reactivemusic.net/?p=7013




download


https://github.com/tkzic/internet-sensors


folder: twitter-ruby


instructions


    

  1. Follow instructions here to send Tweets using Max and Ruby: https://reactivemusic.net/?p=7013
    2. 

  2. At this point you will have a Max patch open and a Ruby server running in a terminal window.
    3. 

  3. Now open little-tikes.maxpat
    4. 

  4. Carefully play individual tones on the Little Tikes piano. 
    5. 





notes


fzero~ is probably not the best choice for this. It doesn’t work above 2500hz which means it won’t probably distinguish between the lowest and highest key which are an octave apart. In fact the Little-Tikes piano, for a pitched instrument, is difficult to analyze. Due to relatively equal weight of partials to fundamental, and the quick decay. Other choices, would be pitch~ (Jehan) fiddle~ (Pucket…)


I remember seeing an Arduino project where somebody did this in reverse – actually built a motorized striker to play the piano)


… insert link to video here…


 

	


	







		

		
Posted on 
Tweet from Max with ruby
	


	
	

		
Update 6/2014: working version here: https://reactivemusic.net/?p=7013


notes


The zapier.com trigger method of sending tweets from Max is limited by number of tweets and sync rate. So it would be nice to set up another intermediary server program in ruby or php which eliminates the middle-man and just sends tweets directly.


Or you could use the mxj searchTweet program, which has been updated to do this on the search side.


twitter gem


update: Got it working with this gem: https://github.com/sferik/twitter. Its much easier than dealing with xively.


docs: http://rdoc.info/gems/twitter


how to destroy a tweet: http://stackoverflow.com/questions/10640811/twitter-gem-how-to-get-the-id-of-a-new-tweet


how to get a timeline: http://bobbyprabowo.wordpress.com/2010/01/01/simple-twitter-gem-tutorial/


example of error handling code:


MAX_ATTEMPTS = 3
num_attempts = 0
begin
  num_attempts += 1
  retweets = Twitter.retweeted_by_user("sferik")
rescue Twitter::Error::TooManyRequests => error
  if num_attempts <= MAX_ATTEMPTS
    # NOTE: Your process could go to sleep for up to 15 minutes but if you
    # retry any sooner, it will almost certainly fail with the same exception.
    sleep error.rate_limit.reset_in
    retry
  else
    raise
  end
end


 


Another useful SO post: http://stackoverflow.com/questions/16618037/twitter-rate-limit-hit-while-requesting-friends-with-ruby-gem/16620639#16620639


 

	


	





		

		
Posted on 
How to set up Max Twitter triggers with Xively and Zapier
	


	
	

		
note: 6/2021 – Everything on this post no longer works, except the idea. See Internetsensors posts for current methods


notes


pachube.com and cosm.com have now changed into xively.com. Also Twitter has migrated to the version 1.1 API. The old method of sending tweets with cosm.com no longer works as of of June 2013.


Here are revised instructions for setting up an intermediary program that allows you to send Tweets from Max/MSP using a xively.com “device” (feed). This setup is required by the tweetCurl patches in the Max/MSP internet sensors project:


https://reactivemusic.net/?p=5859


Summary: the Max program will issue an http: put request to your xively.com feed with the Tweet text as data. When the data is received it triggers a request to xapier.com which logs into your Twitter account and sends the Tweet. xapier.com handles authentication using Oauth.


1. set up a xively.com account (self explanatory)


2. add a device. From the xively.com home page select “develop” from the “web tools” menu. You’ll get a screen like this one:




Click on +add device. The following screen will appear:




Fill in the fields. The names and choices can be whatever you want.  Then click the “Add Device” box to get the following screen:




Now click on +Add Channel. Fill in the Channel ID field with the name: tweet (as shown below) then click the “save channel” box.




3. Add Trigger. The trigger will link this channel to Twitter. Please follow the instructions here: https://xively.com/dev/tutorials/zapier/


Notes:


    

  • You will need to sign up for a free zapier account
    • 

  • assign Twitter as your action service for the “zap”
    • 

  • For the ‘message’ field of your zap select “body trigger datastream value value”. This will be the actual text of the tweet coming from xively.com
    • 

  • limited to 10 tweets per hour
    • 

  • when you select twitter as an action in zapier, it will attempt to log you in to do the oauth authentication. If you are already logged into Twitter – make sure its the correct account.
    • 

  • zapier will provide you with the URL to insert into the trigger field in your xively.com device.
    • 



4. From the xively.com device screen copy the feed-ID and API-key into your Max patch in the appropriate fields.




 


 


 


 

	


	







		

		
Posted on 
Hatsune Miku
	


	
	

		
A vocaloid character


http://en.wikipedia.org/wiki/Hatsune_Miku




(from Wikipedia)


Hatsune Miku (初音ミク?) is a singing synthesizer application with a humanoid persona, developed by Crypton Future Media. It uses Yamaha Corporation‘s Vocaloid 2 and Vocaloid 3 singing synthesizing technology. She was the second Vocaloid sold using the Vocaloid 2 engine, and the first Japanese Vocaloid to use the Japanese version of the Vocaloid 2 engine. Her voice is sampled from Japanese voice actress, Saki Fujita. Hatsune Miku has performed at her concerts onstage as an animated projection.[1] Hatsune Miku is portrayed to be a 16-year-old girl with long teal pigtails.


http://www.youtube.com/watch?v=rL5YKZ9ecpg


An example in Max


by FitanyCereal 




 

	


	







		

		
Posted on 
Tesla vehicle API with Max/MSP
	


	
	

		
notes


update 12/2013 – see this post for an example of how to display geo-coded data from Max/MSP to Google maps https://reactivemusic.net/?p=8115




original post




This is a reference to some notes. In June, I wrote a Max patch to communicate with my brother David’s Tesla Model S, using an API which runs on Tesla servers and communicates with the car. You can do things like honk horn, flash lights, open doors – and also receive data on speed, position, and battery condition.


Can’t really test the control part of this – without the possibility of causing a car accident in California, but here’s a screen shot of the files. Essentially  I just ran a node server for the API and communicated from Max using Osc.




The last thing I did was to track his return trip from SFO to Santa Cruz and plot points on a map.We will eventually update this prototype to plot data on a Google Map.


Much of the logic was borrowed from the Irish Train mapping project: https://reactivemusic.net/?p=5477