Emu XL-7 & MP-7 User's Group

Paul,

You must be a teacher! What an eloquent explanation.

DF Tweedie

--- On Tue, 2/23/10, Paul Vickers <paul@...> wrote:

> From: Paul Vickers <paul@...>
> Subject: Re: [xl7] Newbie: understanding Hex & SysEx??????????????
> To: xl7@yahoogroups.com
> Date: Tuesday, February 23, 2010, 4:39 AM
> Hexadecimal is a base-16 counting
> system. In decimal (base 10) we use  
> the digits 0-9. The sum 9+1 leads to an answer that cannot
> be  
> expressed in a single digit so we add a '10s' column, put a
> 1 in it  
> and put zero in the units column, hence: 10. Hex, as it is
> base 16  
> needs 16 digits to represent its units, so we have 0-9
> which have  
> their usual decimal meaning and then A-F for the hex units
> whose  
> decimal values are 10, 11, 12, 13, 14, and 15. So, the sum
> F+1 is 15+1  
> in decimal = 16. As 16 cannot be represented by a single
> hex digit we  
> put a 1 in the 16s column and a zero in the units column to
> give: 10.  
> So 10 in hex is 16 in decimal.
> 
> Thus we see that FF in hex is 255 in decimal (15*16 + 15).
> 
> Hex is widely used in computing circles because of its
> ability to  
> represent powers of 2 in a few digits. A single 8-bit byte
> can hold up  
> to 256 binary values (from 00000000 to 11111111). As each
> nybble (4- 
> bits, or half a byte) has a maximum value of 15 decimal
> (1111) then a  
> single byte can be represented by a maximum of two hex
> digits.
> 
> 
> On 23 Feb 2010, at 01:31, Rob wrote:
> 
> > I've only been producing and using the Emu a few
> months. I've been  
> > reading manuals and everything on the internet I can
> find. I am  
> > starting to understand Hex & have figure out NRPNs
> and CC. BUT some  
> > SysEx is alien to me. The Emu manual has things like
> KK VV XX YY ZZ  
> > NN but hex is 0 to H. The sysex info seems to have
> different  
> > meanings for different commands for the letters.
> >
> > 8n kk vv is the command for note off.
> >
> > n = midi number
> > kk = ?
> > vv = ?
> >
> > Is this so standard that all companies shouldn't have
> to define it  
> > and I'm missing some chart on it?
> >
> > Is 8n kk vv all I enter or do I need more numbers for
> machine ID,  
> > EMU id, on, off, etc?
> >
> > Most of the tutorial sites treat you like a computer
> programer not a  
> > layman.
> >
> >
> > 
> 
> 
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