Sonic Visualiser

I just started using Sonic Visualizer and I have some comment that might be of interest.
 
Charm reports: "Developed by Chris Cannam of the Centre for Digital Music at Queen Mary, University of London (with some input from CHARM), this free program is a highly customisable playback and visualisation environment that includes such features as variable-speed playback, looping, and the ability to annotate the recording, for instance to identify specific points of reference; you can also use the annotation facility to tap to the beats and so generate tempo data which can be displayed on screen or exported to a spreadsheet program. A particularly attractive feature is the ability to synchronise a number of recordings so that you can jump from one to the corresponding point in another. There is a range of built-in visualisations such as spectrograms, again highly customisable, but an essential strength of Sonic Visualiser is its ability to support third-party plugins: these offer a constantly expanding range of analytical facilities ranging from automated onset detection to pitch estimation and the capture of intensity data."

The software is very good. Much better than anything that I have used up to now.

One can measure the pitches on the spectogram and play with its colors. You can play several sound fills simultaneously and this way it is very easy to examine various recordings of the same composition. You can mute each sound track as you wish. The great advantage of this is that it makes you sharpen your listening.

Ideas for improvement:

 
1) There should be a more friendly help. I would recommend making a video/s on Youtube that will explaining how to use the software on various levels. This would help a lot.
 
2) I am examining Sprechstimme pitches and often it would be useful to have a virtual keyboard that could play midi sounds in order that I could make sure that what I hear is really on the level that I think it is.
 
That is all for the moment. I will probably have more comments as I use SV.