～番 pitch accent

Question

I am aware 一番 bifurcates semantically with 2 readings. I am wondering about other number + 番's pitch in 標準語. When counting with the exception of 5番 which seems to be 平板型, the rest seems to follow a pattern with a downstep before ば: いちばん{LHLL} にばん{HLL} さんばん{HHLL} etc. Is this correct?

I also seem to have heard these words pronounced in such a way that the end seems to go up.

1. ろくばん{LHHH}: 1 (in her other videos she mostly says ろくばん{LHLL}, so is this intonation? Also is she speaking 関西弁?)
2. いちばん{LHLL}にばん{HLL}よんばん{LHHH}ろくばん{LHLL}さんばん{LHHH}ななばん{LHLL} 2 4番 and 3番 seem to differ from their normal pronunciations. I wonder if I heard it right. When two ordinal numbers are read together do they become one word so to speak and the middle gets heightened? This also sounds like that 3
3. The pronunciation of 4番 and 7番 seem to be flattened here, like the one above. 4. Similarly, 5
4. This one sounds like さんばんよんばんごばん{LHHHHHHHHLL} 6. Is that correct?

Also when an ordinal number modifies another noun, how does the pitch change? にばんさん{LHHHH} or にばんさん{HLLLL}? さんばんウッド{LHHHHLL}?

Answer 1

Besides [ごばん]{LHH}, [さんばん]{LHHH} (or [さんばん]{HHHH} in practice) is also 平板. (See this)

When two or more numbers are read together, they may be put in one pitch contour that follows either of the following patterns.

• [□□□…□□ばん]{LHHHHLLL}, if the last number is さん, よん, きゅう or じゅう
• [□□□…□□ばん]{LHHHHHLL}, otherwise

#3 and #6 are typical cases of that.

よんばんろくばん and さんばんななばん in #2 are basically the same, except he pronounces the second number in each pair more or less retaining its original accent.

#1, #4 and #5 are 関西弁. She says [ろくばんななばん]{HHHHHLLL}. If she says [ろくばん]{LHLL}, she is mixing 標準語. The standard pronunciation in 関西弁 is [ろくばん]{HLLL}. Keeping it high to connect to the next number is the same as in 標準語.