Posts Tagged berlin


At the recent Berlin Music Hackday, developer Hannes Tydén developed a mashup between SoundCloud and The Echo Nest, dubbed SoundCloudEchoNest.  The program uses the SoundCloud and Echo Nest APIs to automatically annotate your SoundCloud tracks with information such as when the track fades in and fades out, the key, the mode, the overall loudness, time signature and the tempo.  Also each Echo Nest section is marked.  Here’s an example:

This track is annotated as follows:

  • echonest:start_of_fade_out=182.34
  • echonest:mode=min
  • echonest:loudness=-5.521
  • echonest:end_of_fade_in=0.0
  • echonest:time_signature=1
  • echonest:tempo=96.72
  • echonest:key=F#

Additionally, 9 section boundaries  are annotated.

The  user interface to SoundEchoCloudNest is refreshly simple, no GUIs for Hannes:

Hannes has open sourced his code on github, so if you are a Ruby programmer and want to play around with SoundCloud and/or the Echo Nest, check out the code.

Machine tagging of content is becoming more viable.  Photos on Flicker can be automatically tagged with information about the camera and exposure settings, geolocation, time of day and so on.  Now with APIs like SoundCloud and the Echo Nest, I think we’ll start to see similar machine tagging of music, where basic info such as tempo, key, mode,  loudness can be automatically attached to the audio.  This will open the doors for all sorts of tools to help us better  organize our  music.

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Berlin Music Hackday presentation videos

There are a bunch of videos of presentations and demos from the Music Hackday berlin:

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Photos from Berlin Music Hackday

I am a jelly roll

"I am a jelly roll"

There are some nifty photos coming of the the Berlin Music Hackday.  Here’s a slide show.

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Hacking on the Echo Nest at the Berlin Music Hackday

The Berlin Music Hackday is nearly upon us.  Ben Lacker (a.k.a. DJ API) will be representing the Echo Nest at this wonderful event.  If you want to maximize your hacking time during the hackday there are a few things that you can do in advance to get ready to hack on the Echo Nest APIs:

  1. Get an Echo Nest API Key – If you are going to be using the API, you need to get a key.  You can get one for free from:
  2. Read the API overview – The overview gives you a good idea of  the capabilities of the API.  If you are thinking of writing a remix application, be sure to read Adam Lindsay’s wonderful remix tutorial.
  3. Pick a client library – There are a number of client libraries for The Echo Nest – select one for your language of choice and install it.
  4. Think of a great application – easier said than done.  If you are looking for some inspiration, checkout these examples: morecowbelldonkdj, Music Explorer FX, and  Where’s the Pow? . You’ll find more examples in the  Echo Nest gallery of  Showcase Apps.  If you are stuck for an idea ask me ( or Ben  – we have a list of application ideas that we think would be fun to write.

At the end of the hackday, Ben will choose  the Most Awesome Echo Nest  Hackday Application.  The developer of this application will go home a shiny new iPod touch.   If you want your application to catch Ben’s eye write an Echo Nest application  that makes someone say “woah! how did you do that!”, extra points if its an application with high viral potential.  Check out the list of hacks created at the London Music Hackday to get inspiration.


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