Do You Need an Audio Interface for a MIDI Keyboard?
Updated Nov 13, 2026 · By 
Jonah Mercer · Editorial policy
As an Amazon Associate I earn from qualifying purchases. Buying through the Amazon links on this page costs you nothing extra. Full disclosure
No, not for the MIDI connection itself. A MIDI keyboard sends note data to the computer over USB, and the computer makes the sound, so the keyboard works without an interface. You need an interface only when you also want to record audio, plug in a microphone, or connect speakers.
Check how your keyboard connects
A MIDI keyboard sends note data, not sound, so the cable to the computer carries instructions rather than audio. Keyboards with a USB port connect that way: plug the keyboard into the computer and the software lists it as a MIDI input. No interface sits between the keyboard and the computer for that connection.
Decide what sound you need to hear
The sound comes from the software on the computer, and the computer's own output can play it through its speakers or a headphone jack. An interface adds a headphone output and a speaker output with their own volume control, so you can hear the keyboard without the computer's built-in speakers. If you only play through headphones on the computer, an interface adds little.
Add an interface for microphones and instruments
An interface earns its place when you add sound sources. The Synido A20 lists electric guitars, MIDI keyboards, digital pianos, electric bass and electric drum sets among the instruments it works with, and the sktome bundle pairs its sound card with a BM-800 condenser microphone.
Compare sample rates on the interfaces here
The interfaces here state different sample rates. The Synido A20 states 24-bit/96kHz, the JOYO MOMIX CAB states 48 kHz, and the sktome sound card states a 192 kHz maximum sample rate. The Elgato Wave XLR MK.2 states 24-bit/48kHz in its bullets, while its spec table lists 192 KHz, so use the bullets figure when you compare.
Connect it and set the software
Plug the interface into the computer over USB-C, then plug the keyboard into the computer over USB. Open your software, select the interface as the audio output, and select the keyboard as the MIDI input. Play a few notes to confirm the software responds, then adjust the volume on the interface.
What you need
Synido A20 Portable USB-C Audio Interface for Guitar
A portable USB-C interface with 2 inputs and 24-bit/96kHz resolution that lists MIDI keyboards among the instruments it works with.
- Inputs: 2
- Max sample rate: 96 kHz
- Bit depth: 24-bit
Elgato Wave XLR MK.2 USB Audio Interface
A USB interface with an XLR input, 80dB of gain, and 24-bit/48kHz audio, plus onboard voice effects and touch mute.
- Inputs: 2
- Max sample rate: 48 kHz
- Bit depth: 24-bit
- 2-year warranty stated
sktome Podcast Equipment Bundle
A bundle with a BM-800 condenser microphone and a sound card, with 1 input and a 192 kHz maximum sample rate.
- Inputs: 1
- Max sample rate: 192 kHz, the most here
- 36 months warranty stated
JOYO Guitar Audio Interface for Phone
A pocket-sized USB-C and Lightning interface with a 6.35mm input, a 3.5mm headphone output, and direct monitoring.
- Inputs: 2
- Max sample rate: 48 kHz
- 1-year warranty stated
These come from our ranked list Best Audio Interface for Keyboard, which compares them spec by spec.
Frequently asked questions
Can I use a MIDI keyboard without an audio interface?
Yes. The keyboard sends note data over USB, and the computer makes the sound, so the keyboard works on its own. An interface adds audio inputs and outputs, and it does not carry the MIDI connection.
Does an audio interface make a MIDI keyboard sound better?
No, not by itself. The sound comes from the software on the computer, and the interface only changes how you hear it. An interface adds headphone and speaker outputs, plus inputs for microphones and instruments.
Do I need an interface to record vocals with a MIDI keyboard?
Yes, for a microphone. An XLR microphone needs an interface with an XLR input and 48V phantom power.
Can I plug a MIDI keyboard straight into a phone?
Some interfaces connect to a phone over USB-C, and the Synido A20 lists iPhone and Android among the devices it works with. Check the keyboard's own connection and the phone's port before buying a cable.
Ranked audio interfaces lists
More how-to guides
Product details come from each Amazon listing and can change. Check the listing before you buy.