Comment 3 for bug 1073813

We should distinguish two use cases:
1. Having a fast cpu saving waveform for life situations
2. Having a detailed Waveform for manual track analysis

The current solution focuses 1.

Is it possible to calculate the Missing Samples on the fly when having use case 2?
Is a three band waveform required in 2?
We may consider something like is done, when displaying a high resolution JPG on web. Showing a low res version during the load of the high res version.