Home › Guides › Software vs hardware monitor controller
Software or hardware monitor controller: which do you need?
A monitor controller does three jobs: choose what you hear, send it to the right speakers, and set a level you can come back to. Software does all three before the converter. Hardware still wins at a few things. Here is the honest split.
- Mix on one pair, never switch, always listen at the same level: you may need neither.
- Software handles source and speaker switching, a calibrated volume, mono and side checks, dim and mute, in the digital domain before your converter, with nothing added to the analogue path.
- Hardware still gives you a physical knob, a headphone amplifier, a converter, talkback and multichannel monitoring, and it keeps working when the computer does not.
What a monitor controller does
- Source selection: your DAW, a reference, another input.
- Speaker switching: main monitors, an alternate pair, headphones.
- A volume you can return to, ideally calibrated, so “normal” is the same level every day.
- Checks: mono, side, left only, right only, swap, dim and mute.
- On larger units: talkback, cue mixes for performers, metering.
Do you need one at all?
If you mix on one pair of speakers, never check on headphones or a second pair, and always listen at the same level, you can get by without one. The need starts when you want to switch speakers and headphones, calibrate your listening level, protect your monitors from a stray full-scale burst, or work at low volume without losing the bass.
Where each one sits in the signal path
A hardware controller sits after your interface's converter, in the analogue domain. A passive unit is a switch and an attenuator; an active one adds an analogue gain stage, and models with their own converter add a conversion.
A software controller sits before the converter. Volume and switching happen in the digital domain, and the converter receives the final signal, so nothing is added to the analogue path.
The one theoretical argument for analogue volume is resolution: attenuating digitally lowers the signal against the converter's own noise floor. With a modern 24-bit interface and normal listening levels, that floor stays far below the noise of the room.
What software can do that hardware cannot
Running on the computer, a software controller knows two things an analogue box never can: which application is playing, and how loud you are listening. That opens up:
- a reference taken from any app, level-matched, with nothing to import (see level-matched A/B);
- loudness compensation tied to the volume, so the bass holds when you work quietly (see loudness compensation);
- metering of the material, taken before the volume, so loudness and true peak do not move with how loud you play;
- protection per output, such as a brick-wall limiter and a safety low cut;
- control from anywhere: a MIDI controller, the keyboard, a phone.
What only hardware can do
- A knob you can grab without looking. Software gets one through any MIDI controller, which maps in seconds.
- A headphone amplifier and a converter. A software controller uses your interface's outputs, so their quality is your interface's.
- Talkback and cue mixes, on the larger units.
- Multichannel monitoring. Surround and immersive work need a controller built for it, hardware or software. A stereo software controller is not one.
- Independence from the computer. If the computer freezes or restarts, a hardware unit still plays.
Latency
A software controller runs at your interface's buffer size, like any audio application. It is a monitoring path, not a plugin in your session, so it adds nothing to the DAW's own recording or playback latency. Capturing another application adds a small buffer of its own on that source only.
How to choose
| If you need | Choose |
|---|---|
| A volume knob and one pair of speakers | A passive hardware controller, or none |
| A better headphone amplifier or converter | An interface or a hardware controller that has one |
| Speaker and headphone switching, calibration, protection | Software, with a MIDI knob if you want one |
| Reference from streaming, low-volume work that still translates | Software |
| Talkback, cue mixes, surround | Hardware, or software built for multichannel |
A stereo monitor controller in software
PHON is our studio monitor controller for Mac:
- two sources and three stereo outputs, switched with a crossfade;
- a volume calibrated to ITU-R BS.1116, SMPTE RP 200 or the K-System, with loudness compensation that follows it;
- mono, side, left, right and swap checks, dim and mute, a correlation meter;
- a brick-wall limiter and a safety low cut per output;
- any MIDI controller as a knob, the numeric keypad, or your phone as a remote.