Non deterministic or rule based music
April 8, 2013
What is rule based art?
Non deterministic art has been around quite a while. In the recent decades it started to break out from modern art museums via computer games while inserting itself into business under the name gamification. Rule based art has many forms of appearance. Be it a painting which is made of several pieces which can be moved by the spectator or an installations which depends on various influences like the sound of this windharp embedded in a natural environment. In this post Bitsphere likes to share some insights into the basics of rule based music creation.
Rules and interconnections
Out of very few rules are generally a lot of possible combinations arising. Imagine the action of driving a car: There are few possibilities: left – right – forward – backward – fast – slow. By applying these rules you may reach more places than you would have time to in a lifetime.
If the driver lined up all his decisions by this rules to describe his way from home to the grocery store it would go like: forward 10m – right 90° – forward 500m – right 75° – forward 400m – left 100° – forward 45m. It is clear that only one alteration in the description led to another outcome (the car stops at the gas station for example) and if altering two or more decisions led to a completely other outcome (the car ends up in a holiday resort abroad).
What we also may keep in mind is that there might be other ways to get to the grocery store. Which says that another application of the rules leads to the same outcome.
Example of rule based music construction
To give you a short example of how to work with rules here is a sample piece of music which is based on two rules:
- In each bar the note is shifted up by a third in the diatonic scale (and transposed to a certain range) g – h – d – f – a – c – e – g
- The rhythm in each bar corresponds to a digital number 000001, 00000010, 000000011, 00000100, etc. If there appears a 1 in the number there is sound and if not there is none.
That is how the first eight bars look like in classical score:
This is how it sounds like:
If you have anything to say about ruled based art and music – may it be a link to a resource or your personal opinion – drop me a line!
Sound Map Project, Bandcamp, Typo3, 2013
January 28, 2013
Several things are going on at the Bitsphere Project and made the blog becoming a little starving though in general the year started very good.
The Sound Map Project
The Sound Map Project is going on well there are already a few recordings collected. Birds, waves and the noise of a building site among other sounds. There are some technological issues the final version will for sure not be as intended and described in the last post Developing a Neuchâtel Sound Map. The main reason about the technology change is evernote is recording sounds in exactly one file format which is very well protected by copyright in case of an android phone. But luckily there are many free recording apps which allow high quality file formats. Another issue is that a stand-alone web site allows more flexibility in providing access to the sound map for people with a less technological background which do not know evernote yet.
CMS
Currently Bitsphere is doing a website with the open source CMS Typo3. To work with a CMS to do the bitsphere.ch site and others was a long hold back idea which now comes true and will hopefully make it more easy to update the website on a regular basis. It seems that the skill of mastering a professional CMS also opens business opportunities. In the end the sound map may be done using that system too.
One Minute Video
This year will be a one minute video most likely too. There is an idea with an augmented reality app using a laser to generate music and then turn the outcome in a sounding video.
Ringtones on Vibedeck.com moved to http://bitsphere.bandcamp.com
Vibedeck hosted the Bitsphere Ringtones for a while as mentioned earlier. Unfortunately they are no longer offering a free service and will drop all non paying accounts by the end of January. At this very moment it seems the best solution to move them to bandcamp.com since they offer paid downloads with reasonable fees. http://bitsphere.bandcamp.com is the new URL to get them. Still you may listen to all the sounds at soundcloud but soundcloud is somewhat too limited to offer downloads to non paying users so chances are that the limit is exceeded by people not really using the sounds.
Finally
Thank you for making 2012 the year with the most visits on this blog. If you have any questions, ideas or issues just make use of the comment section or the numerous social media links on this site!
Bitsphere One Minute Video 2012
October 1, 2012
Once again Bitsphere wrote an animation video for the Oneminute video festival in Aarau, Switzerland. This years video consists of colors and music which change in an algorithmic pattern:
Bitsphere decided not to let the video run in the competition blocks, so it was screened only once in Aarau. If anyone knows about a one minute video festival anywhere else in the world, please drop a line so Bitsphere can send it there.


