> The basic idea is to use a scanner as music instrument and translate a scan > line into music notes (x-scale for differnt notes and intensity for the > volume). Therefore it would be nice to have a constant y value (I don't see an > interesting use for y!). So it would be great to read out that one y-line > and produce MIDI notes until Ctrl-C is pressed.
Just to make sure I'm getting the right ideas: you want a scanner to scan a single line over and over quickly so that you can synthesize music by moving objects above the scanner's glass surface? Sounds very interesting indeed! > Is it possible to solve this (read out one line without y movement) in a > frontend application? Or do I have to patch the backend part? Is there any It has little to do with the frontend. Scanners are designed to scan whole 2D documents, so making just a frontend will not be enough. You'll probably have to find a scanner that can do this in hardware (not easy, I suppose), then probably modify its backend. > Is there a counterpart to "sane_get_parameters()" for setting those > parameters, like lines and pixels? The name of sane_get_parameters() can be misleading. It is supposed to return secondary values, i.e. values calculated from the scan options, such as the total number of bytes. Options are set using sane_control_option(), that's what you're looking for, I suppose. > Anybody out there, who can give me some hints or who can say: "Forget It!" Given that (most?) scanners weren't designed for real-time scanning, I'd suggest you look at video cameras instead. It should be fairly easy to do what you want by using a digital video camera, dissect the DV stream so as to take one line only, then use that to generate your music. Andras =========================================================================== Major Andras e-mail: and...@users.sourceforge.net www: http://andras.webhop.org/ ===========================================================================