fix: no-param note handling divergence

terranmon.txt

@@ -2109,9 +2109,10 @@ TODO:
     [x] figure out how IT (0..256) and FT2 (0..FFF + cut) handles volume fadeout numbers, and come up with a compatible Taud spec, then implement
     [x] Pitchbend on Amiga frequency mode sometimes works right, sometimes works wrong. (effect underdelivers) Affects every song with Amiga picth mode, AND ON THE fresh taut.js session only
     [x] Fix 4THSYM.it filters
-    [ ] 4THSYM.it: pitchbend is wrong, some notes keep playing (loudly!) even if new notes are emitted
-    [ ] some notes are emitted with wrong volset (tested with .mod, may affect others as well)
-    [ ] nearly_there_.mod: `C#5 SD300 / ... / C-5 SD200 / A#4 / G#4`: every C-5 SD200 (there are four occurances) gets skipped
+    [x] 4THSYM.it: pitchbend is wrong, some notes keep playing (loudly!) even if new notes are emitted
+    [x] `*2taud.py`: some notes are emitted with wrong volume-set command. Tested with GSLINGER.mod: on order 0x15 channel 1, mod2taud.py emits volume 8 -- also many of the effects are dropped. Suggested solution: currently all converters write default volume to the voleff when original modules (.mod/.s3m/.it) specify nothing; we should also write nothing and let the engine resolve the value just like other trackers do (also we now have "Instrument Global Volume" on instrument definition unlike the other time). This bug may affecting other formats, not just mod2taud.py, as well
+    [ ] nearly_there_.mod: `C#5 SD300 / ... / C-5 SD200 / A#4 / G#4 (at tickspeed 4)`: every `C-5 SD200` (there are four occurances) gets skipped
+    [ ] scale Oxxxx when samples get resampled
     [ ] implement bitcrusher and overdrive  (eff sym '8' and '9')