Use WAV while you are editing and MP3 when you are delivering. WAV keeps every sample, so a cue can be trimmed, layered, levelled and re-exported without accumulating damage. MP3 discards data to save space, which is a fair trade for a finished file and a poor one for a working file.
On a two-second effect the difference in size is a few hundred kilobytes, so the decision is about headroom rather than storage.
WAV vs MP3 for sound effects
| WAV | MP3 | |
|---|---|---|
| Compression | None; every sample kept | Lossy; data discarded permanently |
| A 2-second stereo effect | Roughly 350 KB at 48 kHz, 16-bit | Roughly 50 KB at 192 kbps |
| Survives repeated re-exports | Yes | No |
| Survives heavy level and EQ moves | Yes | No |
| Accepted by every editor | Yes | Yes |
| Right for the working file | Yes | No |
| Right for the delivered file | Only when asked for | Yes |
What lossless and lossy mean
WAV is a lossless format. It stores the audio as uncompressed samples, so the file is a faithful copy of what was recorded or generated, nothing removed. MP3 is a lossy format. It uses a compression model that discards detail a listener is least likely to notice, which is how it fits a similar-sounding file into a fraction of the space. For music streamed to a phone that trade is usually invisible. For a short, exposed sound effect you are about to process, the discarded detail can matter more than you expect.
Quality
At a high MP3 bitrate, a single sound effect played once often sounds close to the WAV to most ears. The gap shows up in two places. First, on transient-heavy sounds such as clicks, impacts, and sharp attacks, lossy compression can slightly smear the very start of the sound, which is exactly the part that gives an effect its snap. Second, quality loss stacks. Every time an MP3 is re-encoded, more detail goes, so an effect that is imported, processed, exported to MP3, then re-imported and re-exported degrades in a way a WAV never does. WAV holds the same fidelity no matter how many times you open and save it.
File size
This is where MP3 earns its place. A lossy file is commonly around a tenth the size of the same audio as WAV, sometimes less. For a large sound library, a mobile project, or anything delivered over a slow connection, that difference is real. WAV files are large because they leave everything in. If you are keeping hundreds of effects on hand or handing a pack to someone on limited bandwidth, MP3 keeps things manageable. For one effect in one edit, the size of a WAV is rarely a problem on a modern machine.
Editing headroom
Editing headroom is the strongest reason to keep WAV while you work. When you cut, pitch-shift, time-stretch, layer, add reverb, or push the level of a sound, you are asking the audio to survive processing it was not originally shaped for. A lossless file gives every process the full signal to work from, so the result stays clean. A lossy file has already discarded detail, and processing can pull those gaps into the open, especially under pitch and time changes. The habit that avoids trouble is simple: work in WAV, and only convert to MP3 at the very end if you need the smaller file.
Delivery
- Editing, layering, mixing, or archiving a master: keep WAV. It is the format that survives reprocessing and re-exports without loss.
- Film, broadcast, and most professional post: WAV, because the whole chain expects lossless audio.
- A finished video where the effect is already mixed in: the export format of the video governs the audio, so the source format matters less than keeping it lossless up to that point.
- A standalone effect that has to be small, such as a web notification or an app UI sound: MP3 (or another compressed format) is a fair trade once the sound is final and will not be reprocessed.
What Morphic gives you
Morphic generates an original sound effect from your description and hands it back as a file you download and add in your editor. The practical takeaway from everything above still holds: keep the lossless version as your working and master copy, do your editing on that, and only compress to MP3 at the end if a smaller delivery file is what you need. Because you generate from a text prompt rather than pulling a fixed clip, you can regenerate a fresh take rather than reprocessing a compressed one when a cue is not landing. For the format side of adding effects to an edit, see sound effect file formats, and browse the Morphic sound library to hear the range.
Every term here can be filled with a generated cue. The impact hits, notification sounds and transitions pages each open in Studio with a working prompt already in the box.
FAQs
WAV is always higher fidelity because it keeps every sample, but "better" depends on the job. For editing, layering, and mastering, WAV is the right choice because it survives reprocessing without loss. For a finished, standalone effect that has to be small and will not be edited again, MP3 is a reasonable trade. The rule that works: keep WAV to work in, compress to MP3 only for final delivery when size matters.
On a single high-bitrate MP3 played once, often not. The difference tends to show on sharp transients, where lossy compression can slightly soften the attack, and it grows every time the file is re-encoded. Since sound effects are frequently short, exposed, and processed, that is exactly the case where keeping the lossless file pays off.
No. Converting an MP3 back to WAV gives you a large file, but it cannot recover the detail the MP3 already discarded. Once audio is compressed lossily, that information is gone. This is why you want to keep the original lossless file rather than rely on converting a compressed one back up.
Work with lossless audio inside your project, then let the video export format carry the final mix. Bringing effects in as WAV keeps full quality through all the cutting, syncing, and level changes, and the compression that happens on final video export is a single, controlled step rather than a loss that stacks across your edit.
Because they store the audio uncompressed, keeping every sample exactly as captured or generated. MP3 shrinks the file by discarding detail a listener is least likely to notice, which is why it can be roughly a tenth the size. The size is the cost of WAV's fidelity, and for a single effect in a single edit it is rarely a burden.
Yes, and that is a practical advantage of generating from a prompt. If a cue is not sitting right, you can adjust the description and generate a fresh take rather than pitch-shifting or heavily processing an existing file, which keeps you working from clean, full-quality audio each time instead of piling processing onto one clip.