cat simply dumps the output of one thing into the standard output. if you type cat readme.txt you'll get the whole text of the readme file pumped out into your terminal screen. if you do cat mysong.mp3 you'll get a bunch of gobbledygook flooding your terminal.
/dev/dsp is the device name of your sound card. so if you cat the contents of a file or the output of another device you can use the redirect command, >, to send that output to /dev/dsp and you'll likely hear something. for example i just did this command: sudo cat audio/HumanAfterAll.wav > /dev/dsp and i'm now listening to a sort of ringing noisy mess. doing: sudo cat Desktop/americas_logo.png > /dev/dsp gave me like 15 seconds of whitish noise. if your scanner is a usb scanner, you can find out what device it is by plugging it in and running this command in a terminal: dmesg | tail I just did it with a wireless mouse device and got this info: [17792.582043] usb 3-2: new low speed USB device using uhci_hcd and address 2 [17792.746260] usb 3-2: configuration #1 chosen from 1 choice [17792.781655] input: Wireless Mouse Wireless Mouse as /devices/pci0000:00/0000:00:10.1/usb3/3-2/3-2:1.0/input/input6 [17792.781866] generic-usb 0003:05FE:0011.0002: input,hidraw1: USB HID v1.10 Mouse [Wireless Mouse Wireless Mouse] on usb-0000:00:10.1-2/input0 i searched around my /dev directory and found this: /dev/bus/usb/003/002 I take that as usb3-2 your machine might be different, but the usb scanner should come up as a device somewhere in /dev/bus/usb so then you could have a terminal open, run the cat command and then control your scanner with whatever software you have on your computer to scan images or something like that. its not very elegant, but you might get some noise out of it. 2010/11/11 João Mário <[email protected]> > On Thu, 11 Nov 2010 23:45:13 +0000 > Rob Myers <[email protected]> wrote: > > > On 11/11/2010 11:29 PM, esphera wrote: > > > > > > Just wondering that you might understand me wrong the previous post. > > > I want to know how can I make a scanner's input data, transformed > > > into sound? > > > > > > I had some advices such as "hack the drivers" or "you can do it with > > > puredata" > > > > > > but I would really like to know how? > > > > > > thanks very much > > > > > > p.s.: I already use arss and enscribe software. but I want hardware > > > stuff. > > > > I don't think you'll be able to just do it with pure hardware. Every > > scanner has a commmunication protocol, even old-fashioned parallel > > port scanners. You need at least something like an Arduino to send > > the commands the scanner is listening for to start it scanning. > > > > Which isn't really related to pure:dyne... > > > > - Rob. > > > > --- > > [email protected] > > http://identi.ca/group/puredyne > > irc://irc.goto10.org/puredyne > > It certainly isn't related to p:d but I thought that p:d community > would fit in this kind of project... so I ask for opinion > > @grant centauri - what those commands do? > > --- > [email protected] > http://identi.ca/group/puredyne > irc://irc.goto10.org/puredyne >
--- [email protected] http://identi.ca/group/puredyne irc://irc.goto10.org/puredyne
