Mixer Soundcraft Signature 22 MTK

The device is described by columns from left to right, where a column starts with an input or output jack, and ends with a fader.
If the knobs have different values written around them, the position of those values are described as the positions of hours on an analog clock.

# Columns 1-6 (channels 1-6)
XLR: Microphone Input
TRS: Line Input
push button: Limiter / *Gr
knob: gain (hour 7: 10dB, hour 17: 60dB)
2 push buttons: high pass filter 100 Hz, USB return
knob: High Frequency Equalizer 12 Khz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: High-mid Frequency Selector (hour 7: 400 Hz, hour 12: 2 kHz, hour 17: 8 kHz)
knob: High-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low-mid Frequency Selector (hour 7: 80 Hz, hour 12: 400 Hz, hour 17: 2 kHz)
knob: Low-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low Frequency Equalizer 60 Hz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: AUX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX2 (hour 7: -inf, hour 17: 10dB)
knob: AUX3 (hour 7: -inf, hour 17: 10dB)
knob: AUX4 FX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX5 FX2 (hour 7: -inf, hour 17: 10dB)
knob: Pan (hour 7: L, hour 17: R)
push button: Mute (There is a "peak" LED at the right)
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Columns 7-8 (channels 7-8)
XLR: Microphone Input
TRS: Line Input
2 push buttons: Hi-Z, Limiter / *GR
Below is exactly the same as for channels 1-6:
knob: gain (hour 7: 10dB, hour 17: 60dB)
2 push buttons: high pass filter 100 Hz, USB return
knob: High Frequency Equalizer 12 Khz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: High-mid Frequency Selector (hour 7: 400 Hz, hour 12: 2 kHz, hour 17: 8 kHz)
knob: High-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low-mid Frequency Selector (hour 7: 80 Hz, hour 12: 400 Hz, hour 17: 2 kHz)
knob: Low-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low Frequency Equalizer 60 Hz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: AUX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX2 (hour 7: -inf, hour 17: 10dB)
knob: AUX3 (hour 7: -inf, hour 17: 10dB)
knob: AUX4 FX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX5 FX2 (hour 7: -inf, hour 17: 10dB)
knob: Pan (hour 7: L, hour 17: R)
push button: Mute (There is a "peak" LED at the right)
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Columns 9-10 (channels 9-10)
XLR: Microphone Input
TRS: Line Input
push button: Hi-Z
Below is exactly the same as for channels 1-8:
knob: gain (hour 7: 10dB, hour 17: 60dB)
2 push buttons: high pass filter 100 Hz, USB return
knob: High Frequency Equalizer 12 Khz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: High-mid Frequency Selector (hour 7: 400 Hz, hour 12: 2 kHz, hour 17: 8 kHz)
knob: High-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low-mid Frequency Selector (hour 7: 80 Hz, hour 12: 400 Hz, hour 17: 2 kHz)
knob: Low-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low Frequency Equalizer 60 Hz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: AUX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX2 (hour 7: -inf, hour 17: 10dB)
knob: AUX3 (hour 7: -inf, hour 17: 10dB)
knob: AUX4 FX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX5 FX2 (hour 7: -inf, hour 17: 10dB)
knob: Pan (hour 7: L, hour 17: R)
push button: Mute (There is a "peak" LED at the right)
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Colums 11-14 (channels 11-14)
XLR: Microphone Input
TRS: Line Input
There are no push buttons for Hi-Z and Limiter here.
Below is exactly the same as for channels 1-10:
knob: gain (hour 7: 10dB, hour 17: 60dB)
2 push buttons: high pass filter 100 Hz, USB return
knob: High Frequency Equalizer 12 Khz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: High-mid Frequency Selector (hour 7: 400 Hz, hour 12: 2 kHz, hour 17: 8 kHz)
knob: High-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low-mid Frequency Selector (hour 7: 80 Hz, hour 12: 400 Hz, hour 17: 2 kHz)
knob: Low-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low Frequency Equalizer 60 Hz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: AUX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX2 (hour 7: -inf, hour 17: 10dB)
knob: AUX3 (hour 7: -inf, hour 17: 10dB)
knob: AUX4 FX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX5 FX2 (hour 7: -inf, hour 17: 10dB)
knob: Pan (hour 7: L, hour 17: R)
push button: Mute (There is a "peak" LED at the right)
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Column 15 (channels 15-16)
XLR: Microphone Input
TRS: Line Input 15/L Mono
TRS: Line Input 16/R
There are no push buttons for Hi-Z and Limiter here.
Below is exactly the same as for channels 1-14:
knob: gain (hour 7: 10dB, hour 17: 60dB)
2 push buttons: high pass filter 100 Hz, USB return
knob: High Frequency Equalizer 12 Khz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: High-mid Frequency Selector (hour 7: 400 Hz, hour 12: 2 kHz, hour 17: 8 kHz)
knob: High-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low-mid Frequency Selector (hour 7: 80 Hz, hour 12: 400 Hz, hour 17: 2 kHz)
knob: Low-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low Frequency Equalizer 60 Hz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: AUX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX2 (hour 7: -inf, hour 17: 10dB)
knob: AUX3 (hour 7: -inf, hour 17: 10dB)
knob: AUX4 FX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX5 FX2 (hour 7: -inf, hour 17: 10dB)
knob: Pan (hour 7: L, hour 17: R)
push button: Mute (There is a "peak" LED at the right)
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Column 16 (channels 17-18)
Identic with channels 15-16:
XLR: Microphone Input
TRS: Line Input 17/L Mono
TRS: Line Input 18/R
There are no push buttons for Hi-Z and Limiter here.
knob: gain (hour 7: 10dB, hour 17: 60dB)
2 push buttons: high pass filter 100 Hz, USB return
knob: High Frequency Equalizer 12 Khz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: High-mid Frequency Selector (hour 7: 400 Hz, hour 12: 2 kHz, hour 17: 8 kHz)
knob: High-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low-mid Frequency Selector (hour 7: 80 Hz, hour 12: 400 Hz, hour 17: 2 kHz)
knob: Low-mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low Frequency Equalizer 60 Hz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: AUX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX2 (hour 7: -inf, hour 17: 10dB)
knob: AUX3 (hour 7: -inf, hour 17: 10dB)
knob: AUX4 FX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX5 FX2 (hour 7: -inf, hour 17: 10dB)
knob: Pan (hour 7: L, hour 17: R)
push button: Mute (There is a "peak" LED at the right)
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Column 17 (channels 19-20)
No XLR input
TRS: Line Input 19/ L mono
TRS: Line Input 20 / R)
knob: trim (hour 7: -20dB, hour 17: 30dB)
push button: USB Return
Missing knob
Missing knob
knob: High Frequency Equalizer 12 kHZ (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Mid Frequency Selector (hour 7: 140 Hz, hour 12: 750 Hz, hour 17: 3 KHz)
knob: Mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low Frequency Equalizer 60 Hz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: AUX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX2 (hour 7: -inf, hour 17: 10dB)
knob: AUX3 (hour 7: -inf, hour 17: 10dB)
knob: AUX4 FX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX5 FX2 (hour 7: -inf, hour 17: 10dB)
knob: Pan / Balance (hour 7: L, hour 17: R)
push button: Mute (There is a "peak" LED at the right)
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Column 18 (channels 21-22)
RCA White: Line 21 / L
RCA Red: Line 22 / R
USB port
knob: Trim (hour 7: -20dB, hour 17: 30dB)
push button: USB Return
Missing knob
Missing knob
knob: High Frequency Equalizer 12 kHZ (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Mid Frequency Selector (hour 7: 140 Hz, hour 12: 750 Hz, hour 17: 3 KHz)
knob: Mid Frequency Equalizer (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: Low Frequency Equalizer 60 Hz (hour 7: 15dB, hour 9: 9dB, hour 11: 3dB, hour 12: -0+, hour 13: 3dB, hour 15: 9dB, hour 17: 15dB)
knob: AUX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX2 (hour 7: -inf, hour 17: 10dB)
knob: AUX3 (hour 7: -inf, hour 17: 10dB)
knob: AUX4 FX1 (hour 7: -inf, hour 17: 10dB)
knob: AUX5 FX2 (hour 7: -inf, hour 17: 10dB)
knob: Balance
push button: Mute (There is a "peak" LED at the right)
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Column 19
TRS: aux 1
TRS: aux 4
TRS: headphones
knob: Phones Level (hour 7: minim, hour 17: maxim)
knob: FX Type 1
knob: AUX1
knob: AUX2
knob: AUX3
Missing knob
knob: AUX5
knob: Balance
push button: Mute
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Column 20
TRS: AUX2
TRS: AUX5
TRS: Foot Switch
push button: Phantom Power
knob: FX Type 2
knob: AUX1
knob: AUX2
knob: AUX3
knob: AUX4
Missing knob
knob: Balance
push button: Mute
Fader + 4 push buttons: PFL, master, group 1-2, group 3-4

# Column 21 (Group 1-2)
TRS: AUX3
USB port: USB Power
knob: Param 1 (hour 7: minim, hour 17: maxim)
knob: Param 2 (hour 7: minim, hour 17: maxim)
knob: Param 1 (hour 7: minim, hour 17: maxim)
knob: Param 2 (hour 7: minim, hour 17: maxim)
knob: AUX1 master
knob: AUX2 master
knob: AUX3 master
knob: AUX4 master
knob: AUX5 master
push button: Mono
2 push buttons: Master, Master
2-buttons Fader

# Column 22 (Group 3-4)
XLR (father): Master L
TRS: Group 1
tRS: Group 3
At the left, 5 push buttons vertically AUX1 - AUX5: Pre/Post
At the right, 5 push buttons vertically AUX1 - AUX5: AFL
push button: Mono
2 push buttons: Master, Master
2-Buttons Fader

# Column 23 (Master)
XLR (fater): Master R
TRS: Group 2
TRS: Group 4
push button: Interval Mute
Master Fader