# 20.12TT

> 20.12TT (iPhone/iPad app by SEIKAKU.)

- Source: https://appshunter.io/ios/app/2012tt/id1372622631 (this page in markdown: same URL + `.md`)
- Developer: [SEIKAKU](https://appshunter.io/developer/860317297)
- Category: Music
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 17 MB
- Languages: American English
- Released: 2018-04-22
- Data updated: 2026-05-18
- User reviews in markdown: https://appshunter.io/ios/app/2012tt/id1372622631/reviews.md

## What is 20.12TT?

20.12TT is a kind of APP program similar to 20.4Live,T20i Its operation object is the second generation digital mixer product which is researched and developed independently by SEIKAKU, and it controls the device through the way of network connection with iPad. Its main function is as the followings:
   -16 microphone preamplifiers with dedicated trim control  16
   -20 line-level inputs  
   -6 Aux sends(4 Analog aux sends and 2 internal aux sends)  
   -4 subgroups and stereo main outs 
   - All channels Control Room output    
   -2 headphone output    
   -USB record/play in main channel  
   -100mm sliding electric fader   
   -touchable color LCD display   
   -24-bit/48KHz sampling rate     
   -Program, save, load & copy functions    
   -Digital gate         
   -Digital compressor     
   -Digital 4-band full parametric EQ   
   -PAN                
   -Phase reverse
   -Time delay
   -Scenes with digital fader and aux position reference   
   -6 DCA for Digital Control Audio Amplifier or MUTE  
   -Remote Control: Ethernet or USB,
   -Expand socket for option module:  Multi-track USB audio recording module or CobraNet module etc(USB Audio Module      or  16in/16out Digital CobraNet module)

Requirements: 
* iPad with iOS9.0 or above. 
* a wireless router. 
*20.12TT Device (for control)


## Version history (last 5 releases)

### 1.3.3 — 2022-03-28

fix some bug.

### 1.3.2 — 2018-07-14

This app has been updated by Apple to display the Apple Watch app icon.

V1.1.3.2主要更新 2018/7/12
1. Fixed an issue where GroupSolo was not displaying properly.
2. Modified the FullMixer interface fader image, adding the green bar display when pushing
3.EQ/PEQ Flat logic adjustment (can be operated under any circumstances)
4.EQ map correction (when 20KHz is pulled to the right, it is not convenient to drag operation)
5. Keep in line with the machine, modify all mS to ms lowercase
6. When the LongFader interface pops up a warning dialog box, the processing mode is consistent with the host.
7. Fixed the problem that the COPY function could not select CH2 and CH10.
8.FullMixer page push to the top will cover the channel name problem
9.Gate/Comp affects the power lamp when switching
10.APP FULL MIXER interface When the channel LINK is used, one of the channels in the first row will light up. And the host won't
11.APP DCA interface The lower right corner of the English display is not complete. Not consistent with the host
12. Fixed the problem that the Solo of the Main channel can be turned on and off.
13. Fixed the problem that the parameter adjustment name on the fader does not switch when the FX1/FX2 interface switching parameter adjustment is fixed.
14. Fixed PEQ interface FREQUENCY, GAIN button Slow sliding parameter value error
15. Fixed FX page, Tremolo/Flanger/Chorus/FlangerRev/ChorusRev
When adjusting, the parameters are not correct with the host.
16. Fixed channel name display problem after AUX1-8link
17. Fixed APPPEQ interface selection EQ1-4 Select Q After switching to N.C, the fader does not move.
18. The APP MIXER interface selects the DCA1-6 error box and will pop up all the time. Instead of clicking OK once, it will not pop up.
19. Fixed the problem of channel synchronization by pressing the up, down, left and right buttons on the machine side.
20. Fixed that switching from the FullMix interface to the DCAFader interface would randomly illuminate a SoLo problem.
21: Fixed a problem with splash screens when EQ ON/OF and type switching
22: Fixed an issue where the APP C Strip interface selected MAIN, the error was displayed, the LINK button was added, and the ASSIGN interface could be switched and the host could not switch.
23. Fixed the problem that the GATE button will change to MIXER when switching to the MIXER interface.
24. Fix the English mark on the APP GATE interface fader as parameter threshold, the parameter attack fader above the value shows error
25. Correct the APP COMP interface parameter threshold, parameter attack, parameter release, parameter comp ratio fader above the value display error
26. When the APP is connected to the host, restarting the host APP cannot be connected back.
27. Fix APP PEQ interface to select EQ1-4 mobile fader, then close EQ and then open EQ fader will not return to the previous position, no memory function problem
28. Fix the stuck hole that will be introduced when Led refreshes
---------
please use the hardware version:v1.2

### 1.1.0 — 2018-06-04

- Fixed the bug when detect device could not return the device name.
- Add refresh button to refresh connection

### 1.0.10 — 2018-04-22

Increase scroll function at the home page

### 1.0.9 — 2018-04-17

No release notes.

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## More apps by SEIKAKU

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All apps by SEIKAKU: https://appshunter.io/developer/860317297

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-18.*