How to Reduce MIDI Latency When Playing Guitar Through Your Computer

What causes MIDI latency and how to fix it

MIDI latency is the delay between when you pluck a string and when your computer registers the note. Even a delay of 10 to 20 milliseconds breaks the connection between your fingers and the sound, making it feel like you are playing an instrument that is slightly out of sync with your body. The delay happens because your audio interface, USB connection, and software all add small amounts of processing time. You can reduce it by changing your buffer size, updating drivers, and choosing the right USB port.

Most guitarists notice latency becomes unplayable around 50 milliseconds. Professional studios aim for under 10 milliseconds. Your goal is to get as close to zero as possible while keeping your system stable.

Key Takeaways

Lower your buffer size in your DAW or audio interface settings — this is the single fastest way to reduce latency, though too low a setting causes crackling and dropouts.
Update your audio interface drivers to the latest version, since outdated drivers add unnecessary delay and instability.
Use a USB 2.0 or 3.0 port directly on your computer, not a hub, and avoid USB hubs that share bandwidth with other devices.
Enable direct monitoring on your audio interface if it has the feature, which lets you hear your guitar with zero latency while recording.
Close background applications and disable WiFi and Bluetooth to free up CPU resources and reduce processing delays.

Lower your buffer size step by step

Your buffer size is the amount of audio data your computer processes at one time. A smaller buffer means your computer updates the sound more often, which reduces latency. Buffer size is measured in samples — common settings are 256, 512, 1024, and 2048 samples. At 44.1 kHz sample rate, 256 samples equals about 5.8 milliseconds of latency.

Open your DAW (Digital Audio Workstation) — whether that is Ableton, Logic, Reaper, or another program — and look for the audio settings or preferences. In most DAWs, this is under Preferences > Audio or Settings > Audio Device. You will see a field labeled "Buffer Size" or "Latency." Start by lowering it from 1024 to 512 samples. Play a few notes and listen for crackling, pops, or dropouts. If the audio is clean, lower it to 256 samples and test again.

If you hear crackling or your audio cuts out, raise the buffer back up by one step. Your system has a limit — pushing below it causes CPU overload. Write down the lowest stable buffer size for your setup. This is your working buffer. You may need to raise it slightly if you are running many plugins or virtual instruments at once.

Update your audio interface drivers

Your audio interface — the device that converts your guitar signal to digital — relies on drivers to communicate with your computer. Outdated drivers add latency and cause connection drops. Check the manufacturer's website for your specific interface model and read the latest driver version.

Uninstall the old driver first. On Windows, go to Device Manager, find your audio interface under Sound, Video and Game Controllers, right-click it, and select Uninstall Device. On Mac, go to System Preferences > Sound and remove any third-party audio drivers listed. Restart your computer, then install the new driver from the manufacturer's website. Restart again after installation is complete.

After updating, open your DAW and check the audio device settings to make sure your interface is selected. Test your latency again — you may notice an when ready improvement.

Connect directly to a USB port on your computer

USB hubs add latency because they share bandwidth with other devices. Plug your audio interface directly into a USB port on the back of your desktop computer or the side of your laptop. If your computer has both USB 2.0 and USB 3.0 ports, try both — some interfaces perform better on one or the other. Check your interface manual to see which standard it supports.

Avoid daisy-chaining multiple USB devices. If you have a keyboard, mouse, and audio interface all plugged in, unplug the keyboard and mouse and use wireless versions instead, or plug them into a different USB hub. Your audio interface should have its own dedicated port with no other high-bandwidth devices on the same hub.

If you are using a laptop, avoid USB-C hubs that split power and data. These hubs often introduce latency because they compress multiple signals through a single connection. A direct USB-C to USB-A adapter is better than a multi-port hub.

Enable direct monitoring on your audio interface

Many audio interfaces have a feature called direct monitoring or zero-latency monitoring. This routes your guitar signal directly to your headphones or speakers without sending it through your computer first. You hear your guitar with no delay while your computer records the MIDI data in the background.

Look for a knob or button on your audio interface labeled "Monitor," "Direct," or "Input." Some interfaces have a software control panel — open it from your computer and look for a monitoring section. Turn on direct monitoring and adjust the volume knob so you hear your guitar at a comfortable level. Your DAW will still record the MIDI, but you will hear the guitar in real time.

If your interface does not have direct monitoring, you can reduce perceived latency by lowering your buffer size and closing all other applications. This is not true zero-latency monitoring, but it gets close enough for most players.

Close background applications and disable wireless

Every process running on your computer uses CPU power. When your CPU is busy, it cannot process audio as quickly, which increases latency. Close your web browser, email client, and any other programs you are not using. On Windows, open Task Manager and look at the CPU column — close anything using more than 5 percent. On Mac, open Activity Monitor and quit applications with high CPU usage.

Disable WiFi and Bluetooth while you are recording or playing. These wireless connections run on the same frequency as USB and can cause interference and latency spikes. Turn them off in your system settings or use airplane mode, then turn it back off so USB still works. You can turn WiFi and Bluetooth back on once you are done playing.

Some DAWs have a "Low Latency" or "Performance" mode in their preferences. Enable this if your software offers it — it disables some visual features to free up CPU power for audio processing.

Test your latency with a straightforward method

You do not need special software to measure latency. Play a single note on your guitar and listen carefully to the delay between the pluck and the sound from your speakers or headphones. If the delay is noticeable — more than a fraction of a second — your latency is too high. If you hear the note almost when ready, your latency is acceptable.

For a more precise test, record a click track in your DAW at 120 BPM. Play along with the click and record yourself. Play back the recording and listen to whether your notes line up with the click or fall behind it. If your notes are consistently late, your latency is still too high and you need to lower your buffer size further.

Keep a note of your settings — buffer size, driver version, USB port, and which applications you closed. When you sit down to play next time, you can recreate the same low-latency setup quickly.

Frequently Asked Questions

What buffer size should I use?

Start at 256 samples and lower it until you hear crackling or dropouts, then raise it back up one step. Most setups work well between 128 and 512 samples. Lower buffer sizes mean less latency but more CPU load. Your audio interface and computer power determine your limit.

Does my audio interface quality affect latency?

Yes. Cheaper interfaces often have slower processors and older drivers, which add latency. Higher-end interfaces are built for low latency and come with better driver support. If you are buying a new interface, check the manufacturer's latency specs — they usually list it in milliseconds.

Can I reduce latency on a laptop?

Laptops are slower than desktops and have less power for audio processing. You can still reduce latency by lowering your buffer size, closing all background applications, and disabling WiFi and Bluetooth. Expect your minimum latency to be slightly higher than on a desktop.

Why does my latency get worse over time?

Background processes and updates can slow your computer down. Restart your computer before playing, close unnecessary applications, and check for driver updates monthly. If latency gradually worsens, a full restart usually fixes it.

Is latency the same as lag?

Latency is the delay in your audio signal. Lag usually refers to delay in video or network connections. In MIDI guitar, you are dealing with latency — the time between your pluck and the sound output.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.