Digital audio processor

PLG-480

  • Model: PLG-480

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This is a high-performance digital DSP processor that supports multi-channel analog signal routing. Users can connect to the device via USB or internal network IP for host computer control, and the simple, user-friendly PC software interface presents operations in a more intuitive and easy-to-understand manner. 

The CPU employs a domestically produced high-performance DSP5001 digital audio processing chip, a dual-core SHARC+DSP processor based on the Arm Cortex-A5 high-performance floating-point core architecture, supporting 64-bit floating-point optimized FIR and IIR algorithms. The A/D section uses an ESS9842PRO analog-to-digital converter chip, capable of 32-bit sampling at 768kHz, featuring a differential filtering input design that effectively ensures high-resolution input signals and noise rejection. It also delivers a professional-grade signal-to-noise ratio of 118dB, efficiently suppressing inherent noise in the digital audio processing circuitry. 





Function


Input gain: -80dB to 12dB 

Output gain: -80dB to 12dB 

Input delay: 0~500ms 

Output delay: 0~1000ms 

Input equalizer type: DEQ/GEQ/PEQ 

Output Equalizer Type: PEQ 



Graphic equalizer: 31 bands per channel input; 

Gain range: ±20dB 



Dynamic Equalizer: 5 inputs per channel; supports bypass 

Threshold: -35dB to 20dB 

Frequency range: 20 Hz to 20 kHz 

Ratio: 1:1 to 10:1; Rise time: 2ms to 500ms; Fall time: 8ms to 2000ms 

Q value range: 0.3 to 15 

Gain range: ±20 dB 

Dynamic Equalizer Operating Modes: Cut Above / Cut Below / Boost Above / Boost Below 



Parametric Equalizer: 15 inputs per channel, 15 outputs per channel; supports bypass 

Parametric equalizer Q range: 0.3 to 15 

Parametric Equalizer Types: PEQ/High-shelf/Low-shelf/AP1/AP2 

High-pass and low-pass filtering: 

Butterworth slope: 12/18/24/30/36/42/48 dB/oct 

Bessel slope: 12/18/24/30/36/42/48 dB/oct 

Linke-Reach: 12/18/24/30/36/42/48 dB/oct 



Input noise gate: 

Threshold: -135dB to -39dB; 

Startup time: 2ms to 500ms; 

Hold time: 2ms to 500ms; 

Release time: 8ms to 2000ms 



Output limiter: 

Threshold: -50dB to 20dB; 

Startup time: 2ms to 500ms; 

Release time: 8ms to 2000ms; 

Ratio: 1:1 to INF:1; 

Gain: ±12dB 

Working mode: Hard press / Medium / Soft press 



FIR order: 512 

FIR cutoff frequency range: 20Hz–20kHz 

FIR filter types: Pass-through, low-pass, high-pass, band-pass, band-stop, external import 

FIR supports file formats: txt, csv 

FIR attenuation range: -32dB to -96dB 

FIR function types: Rectangular/Tukey/Triangular/Hanning/Hamming/Blackman/Kaiser 



Other


Channel parameter copy: supported 

Channel Group Synchronization: Supported 

Signal generator functions: sine wave / white noise / pink noise / sweep; gain range: -60dB to 6dB 

Input/output channel phase: positive (0°) / negative (180°) 

Input/Output Channel Mute: ON/OFF 

Custom user presets: 32 sets 

Engineering startup count lock: Supported 

Panel operation lock: Supported 

System language: Chinese/English 

Work indicator lights: Mute/Peak/Gate/Limiter/Level -24dB to +12dB 

RJ45 network port: UDP protocol; (supports standalone operation only) 

RJ45 connection method: Automatically obtain IP address assigned by DHCP server (router/switch) 



Specifications 

Input Channels: 4-channel analog XLR balanced 

Output channels: 8-channel analog XLR balanced 

Frequency Response (20Hz-20kHz @ +4dBu): +0/-0.3dB 

Total Harmonic Distortion (20Hz–20kHz @ +4dBu): <0.003% 

Signal-to-noise ratio (S/N): 118 dB A-weighted 

Noise floor: <-90dBu 

Dynamic range (20 Hz–20 kHz, 0 dB): >122 dB 

Maximum gain (input to output): 48 dB 

Maximum delay (input to output): 1360ms 

Channel separation (between channels @ 1kHz): >80dB 

Common-mode rejection ratio: 60Hz >100dB@+20dBu 

Input impedance (balanced/unbalanced): Bal: 20K / Unbal: 10K 

Output Impedance (Balanced/Unbalanced): Bal: 100 ohm / Unbal: 50 ohm 

Maximum input level: +20 dBu 

Maximum output level: +20 dBu 

Discrete sampling rate: 48 kHz / 24-bit 

Buffer latency: 4.2ms 

A/D chip: ESS9842PRO 

A/D sampling rate: 768kHz 

A/D converter bit width: 32-bit 

D/A chip: CS4398 

D/A Sampling Rate: 192kHz 

D/A converter bit width: 24-bit 

Sample rate: 96K 

DSP Chip: DSP-5001 

DSP clock frequency: 500 MHz 

DSP word width: 32/40/64-bit floating point dual-core SHARC+ ARM Cortex-A5TM core 

Operating voltage: AC 70V–250V, 50Hz 

Power consumption: 20W @ Max: 50W


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