[middle=<pitch>] and [octave=<number>] do not work

[LupusOssorum]

I read you do not support all ABC2.1 features yet but middle and octave would be particularly useful to me.

""" [middle=] - is an alternate way to define the line number of the clef. The pitch indicates what note is displayed on the 3rd line of the staff. Defaults are: treble: B; alto: C; tenor: A,; bass: D,; none: B. This setting does not affect the playback.

[octave=] to raise (positive number) or lower (negative number) the music code in the current voice by one or more octaves. This usage can help to avoid the need to write lots of apostrophes or commas to raise or lower notes.

[paulrosen]

The middle option will be supported in v3.3.3.

[kinesphere]

We are currently on version 5.6.11, but the octave function still doesn't work? Is that right? This would be very useful for me. Thanks.

[chrisfargen]

+1 for this. Support for octave= in V: and K: would be a great help for writing bass parts. As it is, there are a lot of commas involved.

X: 
T: All for me grog
C: Traditional
L: 1/8
M: 4/4
K: Gmaj
Q: 1/4=100
%
V:1 clef=treble
DG || G2 BA G3 F | EFGE D4 | d2 dd d2 cB | BA- A4 Bc |
V:2 clef=bass
D,D, || G,,2 G,,G,, G,,3 G,, | C,C,C,C, G,,4 | G,,2 G,,G,, G,,2 G,,G,, | D,D,-D,4 D,D, |