The DSP Toolchest
413
MIOStrip
• Synopsis: Mobile I/O Channel Processor
• Category: EQ, Dynamics, Channel Strip
• Channels: 1, 2
Description:
MIOStrip provides a complete channel strip processor in one self-contained signal processor. It in-
cludes dynamics (gate and compressor with side-chain EQ) and EQ in a flexible, internally routable
package.
MIOStrip is a mono or stereo processor and provides a mono sidechain input channel.
The default signal flow through the processor is:
input
→
gate
→
EQ
→
compressor
→
output.
When
Comp First
is enabled, the EQ and compressor order is swapped, and the signal flow
becomes:
input
→
gate
→
compressor
→
EQ
→
output.
The dynamics processor blocks normally detect the level from the signal that is at the input of
the dynamics block, optionally pre-processed by the block's associated side-chain EQ. It is also
possible to route the side-chain input channel to the input of each block's side-chain EQ and
detector. This allows you to use an external key signal to control the dynamics processing in the
channel strip. You can select the side-chain source of each dynamics block independently.
Note: Each band of EQ is capable of being configured as one of 6 types of EQ Filter. The types are:
Peaking/Parametric, Low Shelf, Hi Shelf, Hi Cut, Low Cut, Band Pass, and RIAA. The first 5 types
are parametric filters that allow you to use the Frequency, Gain and Bandwidth controls to adjust
position and shape of the filter that is applied. The RIAA type is special. It is used to decode a signal
that has been RIAA encoded (for example, the signal on a phonograph disc). This filter type would
be selected if you need to decode the output of a phonograph player that is directly connected
to the inputs of your interface, with the use of an external RIAA phono preamp. Only one band of
EQ should be set to RIAA on a channel as using the filter twice will not provide useful results.
Parameters:
Gate Enable
{Off, On}
Enables the gate. When disabled, the gate is hard-bypassed, and does not consume DSP
power.
Gate Threshold
[-100, 0] dB
Sets the threshold at which the gate begins to act. There will be no gain reduction applied by
the gate when the input signal is above this threshold.
Gate Attack
[0, 1k] ms
The characteristic attack time of the removal of the gain reduction. Longer attack times will
cause the gate to cut off the initial transients that bring the gate out of gain reduction. When
the attack time is negative, the Gate detector applies an auto-attack to the incoming signal
to accurately track fast transients smoothly. The attack time is applied in the detector stage
of the Gate block.
