8 Channel Digital Signal Processor

The MU88 8 Channel Digital Signal Processor is a professional digital signal processor built for commercial audio systems that require precise mixing, echo and feedback control, and network-based audio management in a single rack-space unit. Powered by an ADI SHARC 21489 DSP engine, it processes 8 analog inputs and 8 analog outputs with bus-type acoustic echo cancellation, independent-channel feedback suppression, and automatic gain-sharing mixing. A built-in USB sound card enables direct connection to a PC for music playback, recording, and soft conferencing platforms such as Zoom and Tencent Meeting. Designed for integrators and AV consultants, the MU88 simplifies system design in conference rooms, classrooms, and multi-purpose venues by consolidating echo cancellation, mixing, and audio routing into one centrally controllable processor, reducing rack space and installation time while improving day-to-day reliability for end users.

The MU88 belongs to FHB Audio's Dante-ready digital signal processor series, positioned for integrators who need dependable audio processing with network-based control and monitoring. At its core, the unit runs on an ADI SHARC 21489 processor operating at 450 MHz SIMD with 400 MIPS / 1.6 GFLOPS of processing capacity, giving it the headroom to run multiple DSP functions simultaneously without added latency — system delay is held under 3 ms.

Working principle: analog audio enters through 8 balanced input channels, is converted and processed through the DSP engine's mixing, filtering, and dynamics stages, then routed to 8 balanced analog outputs. Bus-type AEC (512 ms tail time, 60 dB/s convergence, 60 dB cancellation depth) removes echo from conferencing signals, while independent-channel AFC applies notch-based feedback suppression with up to 10 dB of additional gain before feedback. ANS noise suppression, a Ducker, and ANC noise-gain compensation further clean up the signal path, and AMC gain-sharing automixing with a gate mixer keeps multi-microphone rooms balanced automatically.

Core value: the 8 Channel Digital Signal Processor reduces a room's audio rack to a single processor rather than a stack of separate mixers, echo cancellers, and feedback suppressors, which lowers both installation cost and long-term maintenance. Its central control support (RS232, RS485, UDP) and 8-way GPIO let integrators tie the MU88 into third-party control systems for one-touch room startup and shutdown.

System advantage: a Windows PC control application allows technicians to edit and store multiple scenes — meeting mode, presentation mode, or event mode — and includes a screen-lock feature to prevent accidental changes to a live system. Up to 30 devices can be managed from a single interface, and the MU88 supports up to 8 devices operating online simultaneously, making it suitable for both single-room installations and larger multi-room deployments managed from one dashboard.

Application positioning: the MU88 is best suited to mid-size conference rooms, training rooms, classrooms, and boardrooms that need reliable voice reinforcement, automatic mixing, and remote control without the complexity of a fully custom DSP programming project.

Product Parameters

Product Features

High-Performance DSP Engine

Built on the ADI SHARC 21489 @ 450 MHz SIMD processor with 400 MIPS / 1.6 GFLOPS of processing capacity, the MU88 runs mixing, filtering, and dynamics processing in parallel while keeping system delay under 3 ms, so live conferencing and speech reinforcement stay responsive.

Built-in USB Sound Card for Soft Conferencing

An integrated one-in/one-out USB sound card connects directly to a laptop or PC, supporting music playback, recording, and soft video-conferencing platforms such as Zoom, Tencent Meeting, and DingTalk without any additional audio interface hardware.

Bus-Type Acoustic Echo Cancellation (AEC)

Bus-type AEC with a 512 ms tail time, 60 dB/s convergence rate, and 60 dB cancellation amplitude removes echo across all active channels, keeping remote participants clear during hybrid meetings and video calls.

Independent-Channel Feedback Suppression (AFC)

Per-channel AFC uses a notch-filter algorithm to suppress feedback on each microphone independently, adding up to 10 dB of usable gain before feedback in open rooms with multiple live microphones.

Noise Suppression and Gain Compensation

ANS ambient noise suppression improves signal-to-noise ratio by up to 18 dB, while the built-in Ducker and ANC noise-gain compensator automatically manage background noise and gain shifts during quiet or noisy periods.

Automatic Gain-Sharing Mixing (AMC)

AMC automixing with a gate mixer balances multiple open microphones automatically, reducing the need for manual gain riding during meetings with several active speakers.

Flexible Central Control

RS232, RS485, and UDP control modes, together with 8-way GPIO, allow integration with third-party control systems for one-touch power, signal switching, and environmental control across a room or facility.

Scene-Based Windows Control Software

A dedicated Windows client lets technicians monitor the processor, edit and recall scenes such as meeting mode or event mode, and lock the screen to prevent accidental changes — with up to 30 devices manageable from a single interface.

Applications

Corporate Conference Rooms

Deliver clear speech reinforcement, automatic mixing, and echo-free hybrid meetings for boardrooms and mid-size conference spaces.

Training Rooms and Classrooms

Support multi-microphone lecture and training environments with automatic gain sharing and feedback suppression for consistent voice clarity.

Multi-Purpose Halls

Handle switching between presentation, discussion, and event audio scenes through recallable, pre-configured processing profiles.

Distributed / Multi-Room Facilities

Manage up to 8 online devices and up to 30 units from one control interface, simplifying oversight of processors across multiple rooms.