Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "jjcorley0000" <jjc@s...> wrote:
> 
>     The SysEx spec errors concern me a bit.  Do you have any more 
> information on them?  Since I'm working with four versions 
> (DTXpressI/II/II and DTXtremeI) and they are very similar, I've 
been 
> able to answer a few questions by cross checking the other specs, 
> particularly the DTXtreme as it's manual and has a bit more text 
with 
> it.

The errors I've found to date are pretty minor but they need to be 
corrected to get things working.

----------------------------------------

The spec says:

B.1 bulk dump - systam data

	system data - 202 bytes

But I think it should be:

B.1 bulk dump - system data

	system data - 203 bytes

-----------------------------------------

The spec says:

	drumkit data - 1066 bytes
	-------------------------------------------------------
	offset	type	range	name
	-------------------------------------------------------
	0	UC*8	ASCII	name
	8	UC	0-127	volume
	9	UC	0-127	reverb return level
	10	UC	0-127	reverb send level
	11	UC	0-11	reverb type
	12	UC	0-69	reverb time
	13	UC	0-63	HH sens
	14	UC	0-127	song select
	15	UC	0-2	tempo select MSB
	16	UC	0-127	tempo select LSB
	17	3bytes	-	reserve
	20	[DRSRC]*25
	970	[DRTR]*16
	-------------------------------------------------------

But I think it should be:

	drumkit data – 1070 bytes
	-------------------------------------------------------
	offset	type	range	name
	-------------------------------------------------------
	0	UC*12	ASCII	name
	12	UC	0-127	volume
	13	UC	0-127	reverb return level
	14	UC	0-127	reverb send level
	15	UC	0-11	reverb type
	16	UC	0-69	reverb time
	17	UC	0-63	HH sens
	18	UC	0-127	song select
	19	UC	0-2	tempo select MSB
	20	UC	0-127	tempo select LSB
	21	3bytes	-	reserve
	24	[DRSRC]*25
	974	[DRTR]*16
	-------------------------------------------------------


The spec says:

	OB64	0:-64, 1:-32, ... 32:0, 33:+1, ... 64:+32
	OB127	0:-127, 1:-62, ... 64:0, 65:+1, ...127:+63

But I think it should be:

	OB64	0:-32, 1:-31, ... 32:0, 33:+1, ... 64:+32
	OB127	0:-64, 1:-63, ... 64:0, 65:+1, ...127:+63

However, I haven't tested this last one yet, I'm just guessing that 
is what they really meant.

I'll let you know if I find any others, or let me know if you think 
I've got this wrong somehow.

Cheers,

Peter