| A | Ampere; unit of electrical current |
| ADAT | Alesis Digital Audio Tape; in this manual, the multichannel optical digital-audio format |
| ADC | Analogue-to-Digital Converter |
| ASP | Analogue Signal Processing |
| BNC | Bayonet-style coaxial connector used for iD48 Word Clock input/output |
| CPU | Central Processing Unit |
| Cue mix | Independent artist/headphone monitor mix |
| DAC | Digital-to-Analogue Converter |
| DAW | Digital Audio Workstation |
| dB | Decibel |
| dBu | Decibel level referenced to 0.775 V RMS |
| dBFS | Decibels relative to digital full scale |
| DC | Direct Current |
| D.I. | Direct Injection / Instrument Input |
| DoC | Declaration of Conformity |
| DSP | Digital Signal Processing |
| EQ | Equaliser |
| FAQ | Frequently Asked Questions |
| FCC | Federal Communications Commission |
| GB | Gigabyte |
| GUI | Graphical User Interface |
| HPF | High-Pass Filter |
| HV | High Voltage |
| I/O | Input / Output |
| JFET | Junction Field-Effect Transistor |
| LED | Light-Emitting Diode |
| Polarity | The positive/negative orientation of an audio waveform; a polarity-invert control reverses it |
| RAM | Random Access Memory |
| RoHS | Restriction of Hazardous Substances |
| Sample rate | Number of digital-audio samples taken per second, expressed in kHz |
| SMUX | Sample Multiplexing; method used by ADAT to carry fewer channels at higher sample rates |
| S/PDIF | Sony/Philips Digital Interface Format; two-channel digital-audio format |
| THD+N | Total Harmonic Distortion + Noise |
| TRS | Tip-Ring-Sleeve connector; may carry balanced mono or unbalanced stereo audio depending on the application |
| TS | Tip-Sleeve connector, normally used for an unbalanced mono signal |
| USB | Universal Serial Bus |
| V | Volt; unit of electrical potential |
| Word Clock | Digital timing reference used to synchronise audio devices to one sample clock |
| XLR | Three-pin connector used for balanced microphone-level audio on iD48 |