Hearing an 8-cent scale on Alto Recorder

Dear Tuners,

I would like to lay out a way for some of you to hear single cents in ascent
and descent on a common alto recorder.

First, get an alto recorder and play low C (LH 1,2,3 & Thumb hole).

Second, sing the perfect fifth above the C while continuing to play a C so
that there are no beats heard.

Third, play this fingering: 0 0 X X (no thumb) and it should be that
identical pitch you sang.

The "normal" fingering for the G is the open voiced sound of the recorder
itself. Only the LH second hole is covered on the instrument. Between these
2 notes is an interval of just under 2 cents.

Play this fingering between the 2 already identified for an even division of
just under a cent: 0 0 X X 0 X (no thumb)

To continue descending by single cents play the following fingerings:

0 0 X X

0 0 X X 0 X

0 X

0 X 0 0 0 0 half

0 X 0 0 0 half half

0 X 0 0 0 0 X

0 X 0 0 0 X

And it continues. It is important not to waver the breath. Try not to think
about tuning and just blow evenly. There may be a slight timbre change
between the top 2 notes and the second hole G series. Most professionals
color this "normal" G with the following: 0 X 0 0 0 half

I can improve its color and still get the pitch where it needs be.

Most people I have demonstrated this to in person hear the motion, but are
unsure of the direction! When I play the first note just before the second
note, then they hear the 8-cent spread and marvel. Slightly tongue each
note so there is full definition in the change of pitch.

Good adventures!

Best, Johnny Reinhard