Product Overview

The Harmonai GLA-204 is a compact, high-performance 2-in/4-out digital audio processor, part of the professional GLA-series DSP audio processing lineup. It features the U.S.-based Analog Devices (ADI) ADSP-21571 dual-core SHARC+ DSP chip, built on the Arm Cortex-A5 high-performance floating-point core architecture and optimized for 64-bit floating-point FIR and IIR algorithms. A/D conversion uses the AK5552 chip (32-bit, 768kHz sampling rate), while D/A conversion uses the AD1955 chip (24-bit, 192kHz master-grade output), delivering professional-grade 118dB input signal-to-noise ratio (SNR) and 120dB output SNR.

The unit provides 2 analog inputs and 4 analog outputs. Each channel supports 5-band Dynamic Equalizer (DEQ), 31-band Graphic Equalizer (GEQ), and 15-band Parametric Equalizer (PEQ). Output channels additionally support 15-band PEQ and FIR filtering. Real-time PC-based control is enabled via USB or LAN IP connection, with an intuitive and user-friendly PC software interface.

Typical Applications

The GLA-204 is suitable for small conference sound reinforcement (meeting rooms/classrooms) — audio signal processing and EQ management; background music in commercial spaces (malls, restaurants, cafés) — audio signal routing; light-duty live sound (small venues/bars); education facilities (classrooms, training rooms) — PA system audio management; and compact home theater systems — audio signal optimization.