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#+title: Allen & Heath CQ-20B

based on MIDI Protocol V1.2 Issue 2

[[file:img/CQ-20B.png]]

The CQ uses MIDI Channel 1 for all control messaging.

* MIDI setup

#+begin_quote
The CQ transmits MIDI messages when any changes are made on the unit (or using a connected app ) to any parameters that include NRPN MIDI Control. This means the raw MIDI output from the CQ can be recorded and then ‘played back’ to the CQ later to automate level and mute control.
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* Available Controls
** Scene change
** Soft Keys
** Mutes
** Levels
** Panning/Balance
** Getting values
* Reference Tables

** Decimal, HEX, Note conversions

[[file:img/cq_ref_1.png]]

** Soft Key Note and Hex values

[[file:img/cq_ref_2.png]]

** Mutes Parameter Numbers

[[file:img/cq_ref_3.png]]

** Level Parameter Numbers — Inputs and FX to Outputs and FX

[[file:img/cq_ref_4.png]]

** Level Parameter Numbers — Outputs, FX unit input and DCAs

[[file:img/cq_ref_5.png]]

** Pan Balance Parameter Numbers — Inputs and FX to Main LR and Outputs

[[file:img/cq_ref_6.png]]


* Further
- [[https://www.allen-heath.com/hardware/cq/cq-20b/resources/][CQ-20B Documents]]
- CQ MIDI Protocol V1.2.0 ([[https://www.allen-heath.com/content/uploads/2024/06/CQ_MIDI_Protocol_V1_2_0_iss2.pdf][pdf]])
- [[https://www.allen-heath.com/hardware/controllers/midi-control/][A&H MIDI Control]] software