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AV InstituteAV Institute LLC
04Week 4 · 5–7 hours

DSP & Professional Audio

Digital signal processing, mics, and acoustic echo

Audio is where commercial AV gets technical. Understand digital audio and DSP fundamentals — sample rates, gain structure, dB and headroom — then microphones, routing, automixing, equalization, and acoustic echo cancellation. Finish with safe commissioning and tuning.

Key Competency

Design and safely commission a small-room audio DSP path.

AV Institute
AV Institute · Week 4DSP & Professional Audio
Lesson

Biamp Tesira & Q-SYS DSP Concepts: Commissioning, Tuning & Verification

Est. 55 minCompetency: Describe DSP commissioning and verification at a high level.

Learning objectives

  • Describe Biamp Tesira and Q-SYS DSP concepts at a high level.
  • Outline a safe commissioning workflow.
  • Tune a room systematically.
  • Verify the result with test signals and a call.

Vocabulary

Biamp Tesira
A DSP platform with fixed and configurable audio blocks.
Q-SYS
A combined DSP/control platform with a software design environment.
Pink noise
A test signal with equal energy per octave; used for tuning.
RTA / analyzer
A real-time spectrum analyzer used while tuning.

Lesson content

Two DSP ecosystems dominate commercial AV: Biamp Tesira and Q-SYS. Both give you audio blocks (mixers, AEC, EQ, dynamics) you wire in software and load to the DSP. The concepts transfer; the software differs.

Ecosystem concepts

  • Biamp Tesira — server/processor with a design tool; drag audio blocks and wires; supports AEC, automixing, routing.
  • Q-SYS — DSP and control in one design environment; same audio blocks plus UCI and scripting.

Safe commissioning workflow

  1. 1Confirm all gains at unity to start; nothing clipped.
  2. 2Set preamp gains for each mic with a talker.
  3. 3Route and enable AEC per mic with the correct reference.
  4. 4Configure the automixer.
  5. 5Apply HPF and gentle EQ using pink noise and an analyzer.
  6. 6Set a limiter on outputs.
  7. 7Align speaker delays by ear from a representative seat.

Verification

  • Confirm no clipping anywhere in the chain.
  • Confirm the far end hears no echo (test call).
  • Confirm local talkers are clear from several seats.
  • Confirm content audio (share) reaches the far end and the room.
No endorsement

References to Tesira and Q-SYS are conceptual for training. This is not manufacturer certification and confers no endorsement.

Worked example

Commissioning the conference room: preamps set with a talker, AEC enabled per mic with the far-end reference, automixer tuned, HPF + light EQ set with pink noise, limiter on outputs, delays aligned by ear. A test call confirms no echo and clear talkers from six seats.

Implementation checklist

  • ✓Preamps set with a real talker.
  • ✓AEC per mic with correct reference.
  • ✓HPF + gentle EQ via pink noise/analyzer.
  • ✓Limiter on outputs; delays aligned.
  • ✓Verified by test call and seat walk.

Downloadable study guide

study-guide.txtcopy-paste ready
01. Tesira and Q-SYS both provide audio blocks wired in software; concepts transfer.
02. Commissioning: gains → AEC → automix → EQ → limiter → delay → verify.
03. Verify with pink noise/analyzer, a test call, and a seat walk.
04. Confirm no clipping, no echo, clear talkers, content reaches both ends.