The DAW Environment

Lorenz Schwarz
Karlsruhe University of Arts and Design (HfG)
Winter Semester 2025/26
Course info

Slides marked include a live REAPER demonstration.

← Overview

The DAW Environment

Early digital music workstations

These systems introduced digital workflows beyond tape-based editing:

  • Synclavier I (1977)
  • Fairlight CMI (1979)
Fairlight CMI IIx. Photo: Peter Wielk, CC BY-SA 4.0, via Wikimedia Commons.
The DAW Environment

Video example

Herbie Hancock demonstrates the Fairlight CMI
Sesame Street (1983)

▶ Watch online (external link)

The DAW Environment

Digital audio workstation (DAW)

A DAW integrates audio hardware, recorded media, MIDI, processing, and mixing within one software environment.

  • record and import audio and MIDI
  • arrange and edit material on a timeline
  • process, automate, route, mix, and monitor signals
  • host instrument and effect plug-ins
  • render and export completed work
The DAW Environment

Overlapping roles in DAW production

A single person may move between several forms of practice:

  • composer: organizes material and form
  • performer: records gestures, takes, and automation
  • editor: selects and reshapes recorded material
  • engineer: records, routes, processes, and measures signals
  • producer: makes decisions about the complete work

→ Technical decisions become part of composition, performance, and authorship.

The DAW Environment

DAW production environment

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The DAW Environment

Destructive and non-destructive editing

DAWs normally store editing decisions without changing the original audio file.

  • non-destructive editing: cuts, trims, fades, gain changes, and processing are stored as project instructions
  • destructive editing: directly changes the sample data stored in an audio file

→ The project stores editing decisions while the source files remain available.

The DAW Environment

DAW software

Ableton Live, Adobe Audition, Ardour, Bitwig Studio, Cubase,
Digital Performer, FL Studio, Logic Pro, Nuendo, Pro Tools,
REAPER, Studio One, and others …

Audio editing software: Audacity (free and open-source), Steinberg WaveLab

The DAW Environment

Interface and timeline

The DAW Environment

REAPER interface overview

↓ Download REAPER

Download and open REAPER, then locate:

  • toolbar and transport
  • track controls
  • timeline and arrange view
  • mixer and master track
REAPER interface overview
The DAW Environment

Toolbar and transport

The toolbar provides editing commands and timeline states. The transport controls playback, recording, position, repeat, stop, and pause.

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The DAW Environment

Timeline, tempo, and grid

The timeline organizes tracks, media items, and automation in musical or absolute time.

  • tempo: defines musical timing in beats per minute
  • grid: divides the timeline into rhythmic or absolute intervals

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The DAW Environment

Tracks and media items

Tracks contain, process, and route audio, MIDI, or automation data. A media item is a recorded or imported segment placed on the timeline.

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The DAW Environment

Regions, clips, and events

DAWs use different terms for objects and ranges on the timeline.

  • clip: timeline segment in Pro Tools or Audition
  • region: Logic Pro object containing MIDI or referring to audio material
  • event / part: Cubase uses audio events and MIDI parts; parts contain MIDI events
  • media item: REAPER object containing audio or MIDI
The DAW Environment

Automation

Automation records and plays back parameter changes (volume, pan, effects, etc.) over time, enabling dynamic, evolving mixes.

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The DAW Environment

The interface is not neutral

A DAW interface guides how sound is imagined and organized.

  • the timeline encourages linear construction
  • grids and default meter favor synchronization
  • tracks divide material into parallel layers
  • channel strips inherit concepts from tape recorders and mixing consoles
The DAW Environment

Signal flow

Routing and buses

The DAW Environment

Channels, sends, shared buses, and outputs in a mixing-console signal path

Mixing consoles established the routing logic inherited by DAWs: channels route, split, combine, and distribute audio through shared buses.

The DAW Environment

Folders, buses, and groups in REAPER

REAPER coordinates tracks through audio routing or control linking.

Method Relationship Typical use
folder automatic child → parent routing submix and project organization
bus track explicit routes feed another track serial submix, parallel processing, or cue mix
track group controls are linked; audio paths remain unchanged coordinated volume, pan, mute, or solo
The DAW Environment

Serial submix and folder routing

A submix combines several tracks before the Master. In REAPER, it can use a parent/child folder or explicit routing to a bus track.

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The DAW Environment

Parallel bus routing

The direct paths remain active while post-fader sends feed an additional processing bus.

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The DAW Environment

Track grouping

Grouping links selected controls without creating a submix. Each track retains its normal route to the Master.

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The DAW Environment

Routing in REAPER

The Routing Matrix shows connections between tracks, buses, hardware inputs, and outputs.

  • create or remove routes
  • inspect complex signal paths
  • verify folder, send, and output assignments

Routing Matrix in REAPER

The DAW Environment

MIDI

The DAW Environment

MIDI data and controllers

MIDI exchanges performance and control data, not recorded sound.

  • notes and duration
  • velocity and expression
  • continuous controllers and commands

A controller translates physical gestures into MIDI data:

  • keys, pads, wheels, and pedals
  • knobs, faders, pressure, and buttons
  • the receiving instrument determines the sound

MIDI.org
The DAW Environment

MIDI items and piano roll

In REAPER, MIDI events are stored in media items and edited in the MIDI editor.

  • horizontal position: time
  • vertical position: pitch
  • note length: duration
  • lower lanes: velocity and control data
MIDI notes and velocity in the REAPER piano roll
The DAW Environment

MIDI instruments in the DAW

The DAW hosts plug-ins and connects them to its MIDI, audio, timing, automation, and routing systems.

  • an instrument plug-in generates audio, usually from MIDI data
  • an effect plug-in processes an incoming audio signal

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The DAW Environment

Plug-ins

The DAW Environment

Plug-in formats and FX chain

The format must be supported by the operating system, DAW, and plug-in developer.

  • VST3: cross-platform
  • Audio Units: Apple platforms
  • CLAP: newer open format

VST3 · Audio Units · CLAP

Plug-in chain in REAPER
The DAW Environment

AI-assisted functions in DAWs

Machine-learning models support specific tasks in some DAWs and plug-ins.

  • source separation and speech transcription
  • pitch, tempo, and content analysis
  • generative performance and processing suggestions

These functions may be integrated into the DAW, loaded as plug-ins, or provided by external services.

The DAW Environment

Project organization

The DAW Environment

Self-contained projects

A portable project keeps the project file and all used media together.

  • copy imported recordings into the project media folder
  • separate source media, project versions, and renders
  • use stable file and folder names
  • reopen a copied project folder to test portability
The DAW Environment

Project safety

  • undo history: reverses recent editing operations
  • autosave: writes recovery copies at regular intervals
  • backup: preserves earlier project states
  • versioned save: creates deliberate milestones before major changes

Use clear names such as montage_01, montage_02_edit, and montage_03_mix.

The DAW Environment

Practical exercises

The DAW Environment

Project setup and automation

Create a small REAPER project with one generated sound.

  1. save the project in a new, self-contained folder
  2. create and render a short sound with JS: Tone Generator
  3. use a volume envelope to create a clear level change
  4. close and reopen the project; confirm that the media and automation remain available

Bypass the envelope and compare both versions.

The DAW Environment

MIDI and a virtual instrument

Use ReaSynth, a basic synthesizer included with REAPER.

  1. load VSTi: ReaSynth (Cockos) and select the Virtual MIDI Keyboard as its input
  2. arm the track, enable monitoring, and record a short phrase
  3. edit either its notes, timing, or velocity
  4. change one ReaSynth parameter without changing the MIDI item

Compare changes to the performance data with changes to the instrument sound.

The DAW Environment

Selected references

  • Constantinou, Stace. “Working with Sound in the DAW: Towards a New Materiality of the Audio-Object.” In Producing Music, Routledge, 2019, pp. 229–45.
  • Walzer, Daniel. “Blurred Lines: Practical and Theoretical Implications of a DAW-Based Pedagogy.” Journal of Music, Technology & Education, vol. 13, no. 1, 2020, pp. 79–94.
  • The MIDI Association. “MIDI Specifications.” MIDI.org.

© 2026 Lorenz Schwarz

Original text, diagrams, illustrations, photographs, audio, and video are licensed under CC BY 4.0, except where otherwise noted.

Fairlight CMI IIx photograph:
Peter Wielk · CC BY-SA 4.0 · via Wikimedia Commons

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