The Wave Number parameter is sent via four data bytes (each byte containing 4 bits of the parameter).
So the line in the ini file should be something like: 11 00 20 2C | 00 00 - 7F 7F | val0.3 val4.7 val8.11 val12.13 (Maybe the order of the 4 "val..." should be reversed; I can't see from the MC-808's SysEx implementation which order is correct.)
Unfortunately the BCF and BCR
work with 14-bit values, i.e. the max. range is 0-16383, whereas the
Wave Number parameter uses 0-16384, so you won't be able to select the very
highest wave number (at least not this way)...