Processing Architecture; 1.Input Processing; 2.Output Processing; 3.Auxiliary Processing - powersoft DSP-Lite User Manual

Processing architecture

FIG. 6 displays the block diagram of the DSP-Lite
hardware architecture. The signal processing layout can be
summarized in three blocks:
f Input processing;
f Output processing;
f Auxiliary processing.

12 : 1.Input processing

Input processing provides the following feature:
f Inputs mono mix (not implemented in presets with only
one input signal).
f Long delay: up to 340ms total, 1 sample step (about
21us).
f Level trimmer via the VCA (smoothed).
f Gain (smoothed).
f Equalizer: 5 biquad bands (limited to 4 bands in 2 IN -
3 OUT preset of LiteMod, LiteMod HV).

12 : 2.Output processing

Output processing provides the following feature:
f Gain.
f Alignment delay: up to 10ms.
PL2
1
2
±VCCMON
TEMPMON
POTENTIOMETER
19 | DSP-Lite
Input 1
MONO
Input stage ADC
Input stage ADC
ADC
Auxiliary
ADC
input
ADC
FIG. 7: DSP-Lite: hardware architecture block diagram.
INPUT
f Equalizer: specifications changes according to preset,
see TAB. 2
f RMS Limiter: frequency dependent limiter with 2
biquad controls available on 2-way presets only.
f Peak Limiter
f Mute
f Clip limiter (not implemented in DigiMod presets)

12 : 3.Auxiliary processing

Output processing provides the following feature:
f Signal presence detection.
f Input ADC clipping detection.
f Measurement and smoothing of the VCA
potentiometer.
f Rails measurement and output stage soft clipping
f Output clipping detection
f Output stage temperature measurement and
temperature limiter (not implemented in DigiMod 3-way
presets)
f Peak and RMS limiters engaged detection (not
implemented in 3-way presets).
EE
ETH port
MCU
or
USB port
1
DAC
DSP
2
DAC
3-4
DAC
12
PL2
1
Output stage
2
Output stage
3
Output stage
4
Output stage
PL3
CLIP