Yamaha RY8 Owner's Manual page 44

DESIGNATING THE METER - If you want to create a pattern from scratch with
a specific time signature, you must first designate the meter for an empty
User pattern while still in Pattern Record Standby Mode—i.e., before initiating
Step or Realtime recording operation. Hold [MODE] and press [PAGE+].
The default meter setting will be flashing. To designate a different meter,
press [-1] and [+1]. To return to Record Standby Mode, hold [MODE] and
press [PAGE-].
ASSIGNING THE TIME SIGNATURE
You cannot change the time signature for an existing pattern. You can only
assign a time signature to an empty User pattern. You can designate both
time signature and quantization factors according to the following table:
Time Signature Quantization Factors
01/04
02/04
03/04
04/04
05/04
01/08
03/08
05/08
07/08
01/16
03/16
05/16
07/16
09/16
11/16
13/16
15/16
36
12, 16, 24, 32
12, 16, 24, 32
12, 16
12, 16
12
16, 24, 32
16, 24, 32
16, 24
16
16, 32
16, 32
16, 32
16, 32
16
16
16
16
the