# CQ (or Qu): channel EQ control from a third-party app over MIDI/TCP?

**URL:** <https://forums.allen-heath.com/t/cq-or-qu-channel-eq-control-from-a-third-party-app-over-midi-tcp/33128>\
**Category:** CQ General Discussions\
**Created:** [9 October 2026 14:59 UTC](https://forums.allen-heath.com/t/cq-or-qu-channel-eq-control-from-a-third-party-app-over-midi-tcp/33128 "2026-10-09T14:59:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![simonet](https://avatars.discourse-cdn.com/v4/letter/s/958977/32.png) [@simonet](https://forums.allen-heath.com/u/simonet)\
**Post date:** [9 October 2026 14:59 UTC](https://forums.allen-heath.com/t/cq-or-qu-channel-eq-control-from-a-third-party-app-over-midi-tcp/33128/1 "2026-10-09T14:59:04Z")

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“Hi, I control a few A&H desks from my own iPad app over MIDI (scenes, mutes, levels with  
‘get’ read-back). The CQ MIDI protocol document (V1.6.3) has no EQ parameters. I asked the  
same question for SQ here: [LINK]. Is channel EQ available from third-party apps on CQ,  
and is there any documentation? Thanks!”

> [@SQ: how to control channel EQ from a third-party iPad app? (MIDI/TCP)](https://forums.allen-heath.com/t/sq-how-to-control-channel-eq-from-a-third-party-ipad-app-midi-tcp/33127):
>
> Hi all, I’m a working musician and the developer of Stemly, a multitrack backing-track player for iPad that I use live. I’ve added control of my SQ-5 to my own build, using the published “SQ MIDI Protocol” (Issue 5), over USB and over MIDI/TCP (port 51325): scene recall, mutes (FX returns etc.) levels (inputs, sends, DCA, FX returns, Aux/Matrix masters) with read-back via the “get” command, so faders on the iPad follow the desk and never jump soft key triggering (tap tempo) What I cannot fin…

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**Author:** ![frenchie](https://avatars.discourse-cdn.com/v4/letter/f/71e660/32.png) [@frenchie](https://forums.allen-heath.com/u/frenchie)\
**Post date:** [10 October 2026 12:54 UTC](https://forums.allen-heath.com/t/cq-or-qu-channel-eq-control-from-a-third-party-app-over-midi-tcp/33128/2 "2026-10-10T12:54:37Z")

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Yes all EQ parameters are available via TCP.  
I understand that you want to implement it inside your Stemly app.

To read TCP frame, I use Wireshark on a PC where the CQ is connected and I run CQMixpad app.  
Set Wireshark to read your ethernet connection with the CQ and add this filter:

`tcp.len >= 8 && tcp.len <= 18`

Then move the control on the CQMixpad app to get the TCP frame out.  
Test them with PacketSender (app for PC).