MIDI vs. Audio Recording: What's the Difference?

When you start recording music at home, you'll quickly come across two important terms: MIDI and audio. Both are used in music production, but they work in very different ways.

If you're recording a keyboard, programming drums, producing electronic music, or connecting instruments to a computer, understanding the difference between MIDI and audio will help you choose the right recording method.

The simplest explanation is this: audio recording captures sound, while MIDI recording captures musical performance information.

Neither method is automatically better. They serve different purposes, and many music producers use both in the same project.

In this guide, we'll explain how MIDI and audio work, compare their advantages, and help you decide which one to use.

1. What Is Audio Recording?

Audio recording captures the actual sound produced by a microphone, instrument, or electronic device.

When you sing into a microphone, play an acoustic guitar, or record the sound coming from a keyboard, you're capturing audio.

The result is a digital audio waveform that represents the recorded sound.

For example, if you record yourself playing a piano, the audio file contains the sound of that piano performance. You can listen to it, edit it, adjust its volume, apply effects, and mix it with other recordings.

How do you record audio?

A typical audio recording setup looks like this:

Microphone or Instrument → Audio Interface → Computer → DAW

For example:

1. Connect a microphone to your audio interface.

2. Connect the interface to your computer.

3. Open your DAW and create an audio track.

4. Select the correct input.

5. Record your performance.

You can also record electronic instruments directly through an audio interface, without using a microphone.

Advantages of audio recording

• Captures the actual sound and performance.

• Works with vocals, acoustic instruments, electric instruments, and electronic instruments.

• Preserves details such as tone, articulation, and playing dynamics.

• Allows you to edit, process, and mix recorded performances.

• Produces files that can be played by standard audio players.

Limitations of audio recording

Once a performance has been recorded, changing individual notes can be more difficult than editing MIDI. You can cut, move, stretch, or process audio, but you generally cannot change a recorded piano note into a different pitch as easily as you can with MIDI.

2. What Is MIDI Recording?

MIDI stands for Musical Instrument Digital Interface.

Unlike audio, MIDI does not record sound. It records information about a musical performance.

This information can include:

• Which notes were played.

• When each note started and stopped.

• How hard a key was pressed (velocity).

• Which MIDI channel was used.

• Other performance controls, depending on the instrument and controller.

Think of MIDI as a set of instructions telling a compatible instrument or software what notes to play and how to play them.

For example, when you play a melody on a MIDI keyboard, your DAW records the notes and performance information rather than the actual sound coming from the keyboard.

You can then use a virtual instrument to play those MIDI notes using a piano, synthesizer, strings, drums, or many other sounds.

How do you record MIDI?

A typical MIDI setup looks like this:

MIDI Keyboard or Controller → Computer → DAW → Virtual Instrument

The process is usually straightforward:

1. Connect your MIDI keyboard to your computer using USB, or connect it through a MIDI interface.

2. Open your DAW and create a MIDI or instrument track.

3. Load a virtual instrument.

4. Select your MIDI keyboard as the input device.

5. Record your performance.

Your DAW stores the MIDI information, and the virtual instrument generates the sound.

Some audio interfaces also include traditional MIDI input and output connections, which allow you to connect compatible hardware instruments.

Advantages of MIDI recording

• Individual notes can be changed after recording.

• You can correct timing and note lengths.

• You can change the instrument sound without recording the performance again.

• You can adjust velocity and other performance information.

• MIDI files usually require much less storage space than audio recordings.

• You can create music using virtual instruments without owning every physical instrument.

Limitations of MIDI recording

MIDI is not a finished audio recording. It needs a sound source, such as a virtual instrument or compatible hardware synthesizer, to produce sound.

Also, MIDI does not automatically capture every detail of an acoustic performance. Some expressive qualities, such as the natural sound of a guitar or the interaction between a vocalist and a room, need to be recorded as audio.

3. MIDI vs. Audio: What's the Difference?

Here is a direct comparison of the two recording methods.

Feature	Audio Recording	MIDI Recording
What it captures	Actual sound	Musical performance data
File content	Digital audio waveform	Notes and performance information
Produces sound by itself	Yes	No
Change individual notes	More difficult	Easy to edit
Change instrument sound	Requires processing or re-recording	Change the virtual instrument
File size	Generally larger	Generally smaller
Best for	Vocals, guitars, acoustic instruments, and final performances	Keyboards, virtual instruments, programmed drums, and editable arrangements

The important distinction is that audio contains the sound itself, while MIDI contains instructions that can be used to generate sound.

4. When Should You Use MIDI?

MIDI is especially useful when you want flexibility during music production.

Recording keyboards

If you play a keyboard connected to your computer, MIDI allows you to record the notes and change the instrument sound later.

For example, you could record a melody using a piano sound, then change it to a synthesizer or strings without performing the melody again.

Producing electronic music

MIDI is widely used in electronic music production because it makes it easy to create and edit melodies, basslines, chords, and other musical parts.

Programming drums

Many DAWs allow you to create drum patterns using MIDI. You can program individual drum hits, adjust their timing and velocity, and assign different sounds to each note.

Using virtual instruments

MIDI allows you to control software instruments using a keyboard or MIDI controller. This gives you access to a wide range of sounds without needing to own the physical instruments.

5. When Should You Use Audio Recording?

Audio is the right choice when you need to capture the actual sound of a performance.

Recording vocals

A microphone captures your voice as an audio recording. MIDI cannot capture the natural sound of singing.

Recording acoustic instruments

Instruments such as acoustic guitars, violins, ouds, and percussion instruments are commonly recorded using microphones or pickups.

Recording electric guitars and basses

You can connect an electric guitar or bass directly to an audio interface and record its signal. You can then use amp simulators and effects inside your DAW.

Capturing hardware synthesizers

If you want to preserve the actual sound coming from a synthesizer or keyboard, record its audio output through an audio interface.

You can still record MIDI at the same time if you want to keep the performance editable.

6. Can You Use MIDI and Audio Together?

Absolutely. In fact, using both is one of the most common workflows in modern music production.

Imagine you're producing a song that includes:

• Vocals recorded through a microphone.

• Acoustic guitar recorded through an audio interface.

• Piano played using a MIDI keyboard and virtual instrument.

• Drums programmed using MIDI.

• A synthesizer recorded as audio from a hardware instrument.

Each track uses the recording method that makes the most sense for that instrument.

This combination gives you the flexibility of MIDI while preserving the actual sound of recorded performances.

Can you convert MIDI to audio?

Yes. This process is commonly called rendering, bouncing, or freezing, depending on the DAW and workflow.

When you convert a MIDI performance into audio, the virtual instrument plays the MIDI notes and the DAW records or renders the resulting sound into an audio file.

This is useful when you're happy with the sound and want to finalize the track, reduce processing demands, or share the audio with someone else.

Can you convert audio to MIDI?

Some DAWs and specialized software can analyze audio and detect musical information such as pitch, timing, or rhythm.

However, the results depend on the recording. A clean monophonic melody is generally easier to analyze than a complex recording containing multiple instruments.

Audio-to-MIDI conversion is not always accurate and may require manual correction.

7. What Is the Difference Between MIDI and USB?

MIDI and USB are often mentioned together, especially when discussing keyboards and music controllers, but they are not the same thing.

MIDI is a communication protocol. USB is a connection standard.

A USB MIDI keyboard uses a USB connection to send MIDI information to a computer.

Traditional MIDI connections use dedicated MIDI ports and cables, commonly found on keyboards, synthesizers, and other music equipment.

Some devices also support USB audio, which allows them to send actual audio to a computer. Others only send MIDI information.

This distinction is important when choosing a keyboard or controller. A USB connection does not automatically mean that a device can record audio directly.

8. Do You Need an Audio Interface for MIDI?

Not necessarily.

If your MIDI keyboard connects directly to your computer through USB and your DAW recognizes it, you can record MIDI without an audio interface.

However, an audio interface becomes useful when you want to:

• Record vocals using an XLR microphone.

• Connect electric guitars and basses.

• Record the audio output of a keyboard or synthesizer.

• Connect studio monitors and headphones.

• Record multiple audio sources.

If you're building a home recording setup, an audio interface is a valuable piece of equipment even if you primarily work with MIDI.

9. Which Should You Choose?

The right choice depends on what you're recording and how much flexibility you need.

Your Situation	Recommended Method
Recording vocals	Audio
Recording an acoustic guitar	Audio
Recording an electric guitar	Audio
Playing a virtual piano using a MIDI keyboard	MIDI
Programming electronic drums	MIDI
Recording the sound of a hardware synthesizer	Audio
Creating melodies that you may want to edit later	MIDI
Producing a song with vocals, guitars, and virtual instruments	Both

If you're a keyboard player or electronic music producer, MIDI can make your workflow much more flexible.

If you're recording vocals, guitars, or acoustic instruments, audio recording is essential.

For most home-studio musicians, learning to use both methods is the best approach.

Frequently Asked Questions

Is MIDI better than audio?

Neither is universally better. MIDI is more flexible for editing notes and changing virtual instrument sounds, while audio is necessary for capturing actual performances and finished sounds.

Does MIDI contain sound?

No. MIDI contains musical performance information, such as notes, timing, and velocity. A virtual instrument or compatible hardware device must generate the sound.

Can I record MIDI without a keyboard?

Yes. You can enter MIDI notes manually using your DAW's piano roll, draw notes with a mouse, or use other compatible MIDI controllers.

Can I record audio and MIDI at the same time?

Yes. Many DAWs allow you to record MIDI from a keyboard while simultaneously recording audio from a microphone or instrument.

Is a MIDI keyboard the same as a digital piano?

No. A MIDI keyboard is designed to send performance information to other devices or software. A digital piano is designed to produce piano sounds and usually includes built-in speakers or audio outputs. Some digital pianos also function as MIDI controllers.

Do I need an audio interface if I have a MIDI keyboard?

Not if you're only sending MIDI through USB to your computer. You may need an audio interface if you want to record microphones, guitars, or the audio output of external instruments.

Final Thoughts

Understanding the difference between MIDI and audio is an important step in learning music production.

Audio recording captures the sound of your performance, while MIDI records the musical information behind it. Both methods have different advantages, and combining them gives you more control over your recording and production process.

Whether you're recording your first guitar track, producing electronic music, or experimenting with virtual instruments, knowing when to use MIDI and when to use audio will help you work more efficiently in your home studio.