By the same author
The general concept is the following. There are six key 'frames' which can be edited manually. It is possible to generate intermediate sounds by interpolation between the frames.
The overall duration of the generated sound is limited only by available memory and your patience (the calculation might appear time consuming): please note the Steps control which determines how many intermediate sound frames would be generated between the 6 given reference sound frames. Another point is that every frame might be as long as 10 seconds - that gives a minute if number of steps is 1, two minutes if it's 2, and so on.
Each frame might have different duration.
There is button which allows to copy one frame into another.
There is the Preview button which allows to hear the sound of every separate frame and see its spectral map. When all the frames are ready either Play or Save button would generate the complete piece which will be played or saved afterwards.
On the roadmap: