Latency

In-Depth Explanation

Latency is the time delay between an audio signal entering a digital system and the processed signal exiting it. It is caused by buffer processing, plugin computation, and analog-to-digital conversion. Every digital audio setup has some latency. The goal is not to eliminate it but to keep it low enough that it does not interfere with recording or monitoring. High latency makes live tracking difficult and can throw off a performer's timing.

How Latency Works

Latency comes from several stages in the signal chain. First, your audio interface converts the analog signal to digital. This takes a small amount of time based on your Sample Rate. Next, the DAW (Digital Audio Workstation) fills an input buffer before processing. The buffer is a chunk of audio the computer handles at once. A larger buffer takes longer to fill, which adds delay. Then any plugins on the track add their own processing time. Finally, the interface converts the signal back to analog for monitoring.

Buffer size is the main control you have. A buffer of 64 samples at 44.1 kHz adds about 1.5 milliseconds of delay. A buffer of 1024 samples adds about 23 milliseconds. That 23 millisecond delay is enough to make a vocalist hear their own voice noticeably late. Most performers notice latency above 10 to 15 milliseconds.

Some plugins add extra latency. Linear phase EQs, convolution reverbs, and lookahead limiters can each add tens of milliseconds. When you stack several of these on a track, the total delay grows. DAWs use plugin delay compensation to align all tracks. This keeps your mix in sync but does not help with live monitoring.

Real-World Example

A guitarist records into a laptop using a budget interface. They set the buffer to 512 samples to avoid clicks and drops. The latency reaches 11 milliseconds. The guitarist hears their playing delayed through headphones. This makes it hard to perform tight rhythms. The producer lowers the buffer to 128 samples. Latency drops to 3 milliseconds. The guitarist can play comfortably now. The CPU load rises, so the producer removes a heavy reverb plugin from the input chain.

In another scenario, a producer mixes a track with 40 plugins loaded. Several mastering plugins add 40 milliseconds of latency each. The DAW compensates so playback stays aligned. The producer never hears the delay because they are not recording live. Latency only becomes a problem during tracking, not mixing.

Why It Matters for Independent Artists

Latency can ruin a recording session. If a performer hears their own voice delayed, they will fight the timing. The performance suffers. You end up with takes that feel stiff or rushed. Fixing this during recording is far easier than fixing it later.

Buy an interface with a direct monitoring option. This sends the input signal straight to your headphones before it reaches the computer. The performer hears zero latency. The computer still records the processed signal on its own timeline. Many interfaces under $150 include this feature.

Set your buffer low for tracking and high for mixing. A buffer of 64 or 128 works for recording. A buffer of 512 or 1024 works for mixing when you have many plugins loaded. Switching between these settings takes seconds and prevents performance problems.

Related Terms

• DAW (Digital Audio Workstation)
• Buffer Size
• MIDI (Musical Instrument Digital Interface)
• Sample Rate