You recorded the lecture, the meeting or a relative telling a story, and it plays back as a faint murmur under the hiss. Full volume only gets you a louder murmur.
How to make a voice memo louder on iPhone depends on what you need: hearing it clearly now, or making a louder file to send. This guide takes them in that order, after the checks that cost nothing.
Why voice memos come out quiet
Usually the voice was simply far from the phone. Each time the distance doubles, the sound intensity reaching the microphone falls to roughly a quarter (about 6 dB quieter) in open space, while the air conditioning and the recording's own hiss stay where they were.
The rest is placement. A memo recorded in a pocket, face down on a desk or with a finger over the microphones comes out muffled as well as quiet, which is harder to recover.
A recording also leaves spare room above speech, called headroom, for the loudest moment, a laugh or a door. That room is what you use when you add gain.
What Voice Memos can and cannot do on its own
Voice Memos has no volume or gain control of its own. Its editor trims and replaces sections, but nothing raises the level.
The setting people reach for is Enhance Recording, which sits with Playback Speed and Skip Silence in the recording's playback options. It appears for Mono and Stereo recordings; Spatial Audio recordings on supported iPhones show Studio Voice instead. Enhance Recording reduces background noise and echo, but it is not a volume control.
Next, rule out the free causes:
- Headphone Safety. On headphones, open Settings > Sounds & Haptics > Headphone Safety and check Reduce Loud Audio. A low threshold pulls headphone audio back down and can undo any boost. Why max volume is not max covers the other limits.
- The output in use. iOS keeps a separate volume for the speaker and each Bluetooth device, so set it while the memo is playing.
- The speaker. If every app sounds quiet, see fixing quiet iPhone speakers.
Follow along in Volume Booster: Bass Boost EQ
Free on the App Store for iPhone and iPad.
App Store
Make a voice memo louder in Volume Booster
Voice Memos shares and exports recordings as M4A files by default, which Volume Booster imports, so the memo can play somewhere that has a gain control.
- In Voice Memos, tap the recording, tap the More button (three dots), then tap Share.
- Choose Volume Booster from the apps. If it is missing, tap Save to Files and import the memo from Files inside Volume Booster.
- Start with the boost low and raise it in steps using the quick levels.
- Safe Limiter helps reduce clipping and distortion as the level rises, but does not remove them.
- Stop when speech turns harsh or crackly. That is this recording's ceiling, and choosing a boost level explains why it varies.
- For a long lecture, background playback and Continue Listening let you listen with the screen off and resume later.
If a memo is still too faint, a rewarded ad unlocks up to 800% boost for the current session, and the optional one-time Remove Ads purchase keeps 800% unlocked with no subscription.
Know the limits. The boost applies only while the memo plays inside Volume Booster; back in Voice Memos it is as quiet as before. It cannot boost Voice Memos itself, calls, other apps or the system volume, because iOS does not allow that. Playing MP3 files on iPhone uses the same import route.
Turn it down before you press play
A heavily boosted quiet memo is not quiet everywhere. A laugh beside the phone or a dropped pen can arrive far louder than the speech around it, and on headphones that is a jolt. Start at a moderate phone volume, raise things gradually, and keep safe listening levels in mind for long sessions.
Make speech clearer, not just louder
Gain brings up background hiss and room noise along with quiet speech. For a voice recorded across a room, the 10-band equaliser often helps more than extra boost.
- Lift the presence range. Raise the bands between roughly 2 and 4 kHz, where consonants live and words become distinct.
- Pull down the low end. Speech needs little below about 100 Hz. Cutting there, or lowering the bass control, removes rumble from traffic and handling.
- Ease the top if it hisses. A small cut in the highest bands makes boosted hiss less tiring.
- Leave the reverb off. The room, studio and hall effects add the echo you are trying to lose.
The presets include ones aimed at vocals, which make a fair starting point. Save what works as a custom preset, and use the one-tap bypass to check you have improved things, not just changed them. EQ settings for podcasts and audiobooks goes further.
If you need a louder file to send
Volume Booster neither edits the original nor exports a louder copy. For that you need an editor.
On the iPhone, Apple's free GarageBand app can bring the memo in on an audio track, where you raise the track's level, check it is not distorting and share the result as a new audio file. On a computer, any audio editor with a gain or normalise function does the job.
Normalising raises the whole file until its loudest peak reaches the maximum, so one loud cough that already peaks near the maximum leaves the speech barely moved; a compressor or limiter handles that. Keep the original until you are happy with the copy.
Record louder next time
Nothing restores detail that never reached the microphone, so the best fix is a better recording.
- Keep the phone close to the speaker and pointed towards them.
- Keep fingers, cases and fabric clear of the microphones.
- In a lecture, sit near the front or ask to leave the phone near the lectern.
- Make a ten-second test and play it back before the part that matters.
To simply hear a speaker in the room, Live Amplify amplifies the microphone through headphones in real time. It amplifies sound in real time rather than making a recording, so use Voice Memos for a copy; what a live amplifier does explains more.
Quick answers
Does Enhance Recording make a voice memo louder?
No. Apple describes it as reducing background noise and echo on Mono and Stereo recordings, which can make speech easier to follow, but it is not a volume control.
Can I send someone the boosted version?
Not from Volume Booster, which does not export a louder copy. Make one in GarageBand or a computer audio editor, then send that.
Why is a voice memo so much quieter than music at the same volume?
Commercial music is mastered, compressed and limited so its average level sits close to its peaks. A voice memo is not mastered, so it keeps lots of headroom above the speech.
Where to get it
Volume Booster: Bass Boost EQ imports the M4A files Voice Memos shares and plays them with adjustable boost, a 10-band equaliser and Safe Limiter, so a quiet recording can be lifted with less risk of distortion.
Check Headphone Safety first, then give the voice presence before you give it more gain.