Arturia BeatStep Pro MIDI/Analog Controller and Sequencer Kit with CV/Gate Cables (Black) - Manual (Page 124)

10.9.5. Transposition
These parameters affect the way the BeatStep Pro will respond to Transposition commands:
10.9.5.1. Transposition Latch
This preference allows you to choose whether a sequence will be transposed momentarily
or latched when receiving incoming MIDI notes on the Transposition Input Channel. With
either setting the transposition will happen immediately; the difference is what will happen
once the key is released.
When Latch is Off the sequences will transpose back to the original key immediately after
the key is released. When Latch is On the sequences will stay transposed after the key is
released, and continue in that key until another key is pressed.
This parameter does not affect the transposition from the pads on the unit, only what comes
from an external source.
10.9.5.2. Seq Trans. Input channel
Instructs the BeatStep Pro which MIDI channel will set the transposition amount.
10.9.5.3. Seq Trans. Input port
Use this to tell the BeatStep Pro which MIDI port will receive the transposition request. The
options are USB, MIDI, or USB & MIDI (both).
10.9.5.4. Seq Trans. Center pitch
The Center pitch decides which incoming note means “don’t transpose”. The default value is
MIDI note #60, or middle C [C3].
So for example, an incoming C3 won't transpose the sequence, but an incoming D3 will
transpose the sequence +2, etc.
119 Arturia - User Manual BeatStep Pro - MIDI Control Center