TL Audio M4 - Manual (Page 10)

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low-mid (LM) (i.e. it boosts or cuts a section of the audio spectrum around its
selected centre frequency only.), peaking, sweepable high-mid (HM) and shelving
high frequency (HF). The LF shelf operates at a frequency of 80Hz, while the HF
shelf is set at 12kHz. The EQ slopes have a second order 12dB/octave response,
and an associated gain control on both bands provides up to 15dB of cut or boost
on each selected frequency, controlling the full range of frequencies below the LF
corner frequency and above the HF corner frequency. Both mid bands have a
fixed Q of 0.7 (which corresponds to a bandwidth of around 1.5 octaves) allowing
+/- 15dB cut or boost over a moderately broad band of frequencies. The centre
frequency is selected via the dedicated variable frequency control, and the
required amount of cut or boost is applied using the associated gain control. The
range of frequencies selectable is 50Hz to 2kHz on the LM band, and 500Hz to
18kHz on the HM band, giving a wide spread of frequencies with good overlap in
the 500Hz to 2kHz region.
You should frequently A/B the sound you are Equalising by pressing and
depressing the EQ button, it is astonishing how quickly the ear can adjust to
changes. By making frequent comparisons you can make sure you do not stray
from the required sound. It is also worth spending some time getting used to the
EQ on the M4 - it sounds great and you'll be amazed how versatile and musical it
can be.
Insertion Points
Although the insert points are configured to be pre EQ, you can make them post
EQ by depressing the button marked 'POST' in the insert section (under the EQ
section on each channel strip). There is also a button to enable and disable the
insert within the signal chain, this allows for easy A/B comparison of the signal
and is also great for live set ups and recording when you want to quickly disable
an insert (i.e. a gate).
Aux Sends
Each channel strip has 4 auxiliary sends, two of which can be set to pre fade send.
Pre fade sends would typically be used for creating headphone cues, whilst post
fade sends are used for effects sends (i.e. reverb, etc). Aux 1 and Aux 2 are
switchable to pre, Aux 3 and Aux 4 are permanently fixed to post fade.
Track Level Control
This control sets the level of the signal being sent via the direct outputs, in enables
you to create a different mix to tape than what is being heard through the main
stereo bus from the channel faders - ideal for live situations. The direct output is
also selectable to become Pre EQ by pressing the button located to the bottom
right of the track level knob. If you want the level to tape to be the same value as
the fader then leave the knob in the central position, set to 0dB.