[linux-audio-user] [martin-langer_AT_gmx.de: [sane-devel] What about creating music with scanning devices?]

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Subject: [linux-audio-user] [martin-langer_AT_gmx.de: [sane-devel] What about creating music with scanning devices?]
From: Ross Vandegrift (ross_AT_willow.seitz.com)
Date: Mon Mar 31 2003 - 00:14:39 EEST

As seen on sane-devel (Yes - that's SANE, the scanner people!)

Ross

----- Forwarded message from Martin Langer <martin-langer_AT_gmx.de> -----

From: Martin Langer <martin-langer_AT_gmx.de>
To: sane-devel_AT_mostang.com
Subject: [sane-devel] What about creating music with scanning devices?
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Hi,

I've just had an idea about a crazy scanner frontend:

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.

I'm more involved into the ALSA side of this problem and absolutely new to
sane development. So my question:

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
developer information available? I've just had a look to some command line
frontends, but they don't touch this point (ok, it's possible that I'm
blind!). But my impression was: they only handle complete scans, which I don't
want to use. Or is there a general problem in the control of scanning
devices, if I have this goal ..... because they were not build for this use.

Is there a counterpart to "sane_get_parameters()" for setting those
parameters, like lines and pixels?

Anybody out there, who can give me some hints or who can say: "Forget It!"

thanks,
martin

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-- 
Ross Vandegrift
ross_AT_willow.seitz.com

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He has it pierced.                It is a Holey Wholly Holy Holy-Water Cannon.
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