MIDI vs audio: what to use when you make and share music

The difference in one musical example

Imagine a four-note keyboard melody. A MIDI version keeps instructions for the notes and their performance. An audio version keeps the sound you recorded or exported. MIDI is performance information rather than a recording of that sound. This difference is why the two versions are useful for different musical jobs.

If you want the last note to be higher, an editable MIDI part lets you change that note. If you want someone to hear the exact keyboard sound you chose, an audio copy gives them a listening reference. Keeping both can make a handoff clearer: the notes offer flexibility, and the recording shows what you meant.

SODIUM COLLAB is a browser music studio that combines editable MIDI, audio recordings and shared projects. Write the keyboard phrase as MIDI, keep a recorded voice as audio and hear both in the arrangement. Use the comparison below to choose what each part of your SODIUM COLLAB project needs to preserve.

Use MIDI while you are deciding the musical part

MIDI is useful when a melody, bassline or rhythm is still changing. You can test a shorter note, move the answer phrase later or try a different instrument without performing the whole idea again. Those decisions are especially helpful when you are learning what a musical part needs to do.

For an original exercise, write three short notes and one longer note. Make a second version with the final note lower, and a third version with the first note delayed. Keep the instrument sound the same while you compare the phrases. Then keep your favorite phrase and try a different instrument. Separating the note decision from the sound decision makes the comparison easier to hear.

The sound still matters. A soft keyboard and a sharp plucked instrument can make the same notes feel different. Do not assume a note pattern will automatically create the same musical effect on every instrument. Listen to the part in the actual arrangement, especially where its notes overlap with other sounds.

Write the notes in SODIUM COLLAB Piano roll when the melody or harmony is still changing. Keep them editable while testing the instrument sound. That makes MIDI particularly useful for a collaborator who may suggest another chord, a shorter note or a different ending to the phrase.

Use audio when the performance itself matters

A sung line contains more than a list of pitches: pronunciation, breath, tone and small changes in delivery contribute to its character. A guitar recording may include a pick attack or a resonant ending that you want to keep. Recording audio in SODIUM COLLAB preserves the sound of that performance beside the other parts.

Try recording the same short phrase twice. Choose the take whose delivery fits the piece, not simply the one with the tidiest timing. You can trim an unnecessary pause and balance the level, but the reason to use the recording is its sound. Keep the original take while you experiment so you can return to it if an edit removes something you liked.

Record or import the performance in SODIUM COLLAB when its actual sound is what matters. A singer’s phrasing, a guitar’s attack or an original room texture can live beside the MIDI arrangement. You can then judge the recording against the song rather than treating it as a detached file.

Choose by the change you need to make

There is no need to choose one format for an entire song. A project might combine MIDI drums, a recorded bass, a software keyboard and a vocal take. Give each part the form that suits its musical role and the changes you expect to make. You can decide whether to keep an editable note version alongside a rendered recording.

Keep flexibility and a clear listening reference

Suppose a collaborator wants to replace your keyboard sound. Send the note part if that is appropriate for the tools you are using, and send an audio reference with it. Add a note such as “The melody answers the vocal in the second half of the verse.” That sentence describes the job of the part and helps them avoid making a technically valid change that conflicts with the song.

If you are exchanging audio parts, agree on their starting position. A short file called “bass” is harder to place than a file clearly identified as beginning with the arrangement's first bar. Listen to the beginning and ending after import. Useful filenames and one clear instruction can prevent a long conversation about why two parts do not line up.

Inside SODIUM COLLAB, keep the MIDI melody beside the recorded vocal and invite the collaborator to the shared project when appropriate. They can hear the melody's job before changing its notes or sound. Use project chat to identify the verse and explain whether the melody should answer or support the singer.

Avoid three common format mix-ups

• A silent MIDI file does not necessarily contain a bad performance. It needs an instrument or playback setup that can turn its notes into sound.
• A listening mix is useful for feedback, but it does not replace a project when someone needs to edit the separate parts.
• A file extension does not tell you the musical role. Name the part and describe whether it is a reference, an editable note part or a recording to use.

Before sending anything, open the files you intend to share and check them. If your note part sounds different in another setup, compare it with the audio reference and choose an appropriate instrument there. If a listening file contains the wrong version, return to the project and export again. Review the handoff as music, not only as a list of filenames.

Working with MIDI and audio in SODIUM COLLAB

SODIUM COLLAB is useful when a song needs both flexible notes and a distinctive recorded performance. Choose Add instrument for a keyboard melody and write it in Piano roll; use Set up recording for the singer's actual delivery. Those parts can then be arranged and balanced together. Drum Rack uses Step sequencer for patterns. You can export audio for listening, MIDI for musical events or a SODIUM COLLAB project for an editable handoff.

For collaboration inside SODIUM COLLAB, shared project access keeps the parts and project chat together. Ask someone to revise the notes if the melody needs a different ending, or discuss the audio take when the phrasing is the important decision. Use the appropriate role and wait for audio uploads before requesting review. Join the SODIUM COLLAB beta mailing list to hear when it opens. Imported MIDI does not bring its original instrument sound; choose a sound and include a listening reference.