How to fix custom song glitches on emlators.

I didn't remember string were the heaviest, oh well...
Just saying, are the special instruments counted for the block limit?

With special instruments i mean those:
@0x00 = a 'buzzing-bee' kind of synth.
@0x01 = a weird futuristic sounding brass.
@0x02 = a less shrill version of 0x01.
@0x03 = a lower octave sci-fi sound.
@0x04 = a static percussion sound.
@0x05 = a sawtooth synth. I like this one the best.
@0x06 = a higher octave slightly more funky sawtooth.
@0x07 = soft static. (Zozo's rain sound)
@0x08 = sounds like a saxophone on crack.

Thinking to that better i don't even know their size...