[sdiy] Digital IO board with USB control & VBnet access examples...??

cheater00 . cheater00 at gmail.com
Mon Jun 10 10:34:51 CEST 2013


Hi Brian,
touch screens routinely work with a physical resolution much lower
than the screen resolution (why would they be the same?) and an
interpolated resolution much higher than the physical resolution.

Cheers,
D.

On Mon, Jun 10, 2013 at 9:51 PM,  <rsdio at sounds.wa.com> wrote:
> m.: I've never seen a control surface with more than 10 bits of resolution. If
> someone can point out a product that exceeds 10-bit A/D, then please mention it
> here. I'm not talking about the Lemur, unless you can tell me whether the touch
> response actually exceeds the 800x600 pixel resolution.
>
> Anyway, the Livid Builder Brain has breakout pins on one of the headers so that
> you can attach a serial A/D that reaches 14-bit or 16-bit (or even 24-bit if
> you could get a 24-bit A/D working reliably with a ribbon controller). You'd
> need to develop your own firmware if you add a better A/D, but at least you
> wouldn't need to design a USB device.
>
> Getting back to the original question, I totally made the assumption that since
> this is Synth DIY, then it would be most useful to have a USB-MIDI device that
> would respond to Note and Control events. There are certainly I/O boards that
> implement raw, custom USB to pins, but that seems far removed from a musical
> application. The Builder Brain will work directly with Ableton, Max/MSP or
> other music software without a driver or translation hardware. Provided that
> you can do all the manipulation that you need with Logic Pro, Max/MSP, or the
> equivalent, then I personally recommend against VB.
>
> Brian
>
> p.s. I think the Lemur uses floating point, so it's rather difficult to
> determine the actual control input resolution without doing a histogram of the
> actual, raw values coming from the surface. Has anyone done the analysis? I
> searched the web and found no concrete information about the native touch
> resolution of the Lemur (or iPad, for that matter). In the case of the iPad,
> it's probably an Apple trade secret.
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