''Here is a broken link to download a converter
http://members.lycos.nl/s10manager/Files/syx2wav.zip''
I found this, maybe someone can make more sense of it than i can.
syx to wav conversion
here's the structure if you want to write a routine to do it.
<sysex start> <sysex MID> <IR command message> <IR data> <checksum for IR data> <sysex end>
<sysex start> = 0xF0
<sysex MID> = 0x00 00 7D
MID = Manufacturer ID = Configurable in Axe-fx by default it's 125 = 0x7D
<IR command message> = 0x00 0A 00 00 00
<IR data> = 1024 Little-endian 32-bit signed integers (2's complement) nibbled out for sysex.
* The nibble itself is also little endian
* For example for the 32-bit integer value 0x78563412
* little endian value is 0x12345678
* nibbled out for sysex = 0x02 01 04 03 06 05 08 07
<checksum for IR data> = One byte XOR checksum of the pre-nibbled IR data, the checksum byte is also nibbled out in little endian fashion.