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Best practices
Getting clean recordings on iPhone
A few iOS settings make a real difference when you're tracking in the field.
1
Auto-Lock — set to Never
Settings → Display & Brightness → Auto-Lock
Field Recorder Pro will not keep recording when the screen sleeps. For long takes, consider setting Auto-Lock to Never.
2
Silence notifications — turn on Focus / Do Not Disturb
Control Center → Focus → Do Not Disturb
A phone call or loud notification will interrupt the audio session and stop recording. Turn on Do Not Disturb (or a custom Focus) before tracking. Airplane Mode is even safer if you don't need cellular data.
3
Be aware — hold the iPhone carefully
Hardware
The iPhone microphones are all over the phone. Covering a mic with a finger, resting it on a soft surface, or covering it with a thick case will dull the recording. Consider the location of the microphone on your device as you are recording. For stereo recording, try holding the phone in landscape with the bottom edge pointed at your subject.
4
Wind Noise or Rumble — its sometimes unavoidable
Filtering and/or Windscreen
Try the built in filtering to reduce wind noise and low-end rumble. There's no physical wind protection on an iPhone mic. For outdoor location work, a windscreen over the microphone in use dramatically cleans up wind noise.
FAQ
Frequently asked questions
Where are my recordings saved?
Inside the app's local Documents folder on your iPhone. You can browse, play, and swipe-to-delete them from the Recordings list inside Field Recorder Pro. To get them off-device, use the iOS share button to AirDrop, save to Files, or send via email or messaging.
Which file formats and sample rates are supported?
WAV, AIFF, CAF, and M4A at 44.1 / 48 kHz with 8-bit, 16-bit, 24-bit, or 32-bit float depth. Mono or stereo. For high fidelity recordings we recommend AIFF at 32-bit. For noisy, lo-fi, experimental sounds try the 8-bit setting and/or the very low bitrates in the M4A file setting!
Why does my stereo recording show a lower sample rate than I picked?
iPhone's built-in stereo beamforming is capped around 16–24 kHz depending on the hardware. Field Recorder Pro treats the sample rate in Settings as a user request, and in stereo mode or depending on the microphone selected the hardware may ignore it. The title bar metadata always shows the actual file format.
What is stereo beamforming?
A way of combining the iPhone's multiple internal mic capsules to synthesize a stereo image. It's not as wide as two separate physical mics, but it gives you real left/right separation from a single device with no external hardware. Field Recorder Pro switches into beamforming mode automatically when you choose Stereo.
My iPad won't let me record in stereo.
iPads don't support stereo beamforming — it's an iPhone-specific hardware feature. The app detects this at launch and defaults to mono on devices without stereo support. The Stereo segment in Settings will be greyed out.
How do I monitor through headphones?
Plug in wired headphones (with a Lightning or USB-C adapter where needed) and monitoring engages automatically — you'll see the headphone icon light up in the top right of the status bar. Tap it to mute/unmute.
Can I monitor through AirPods or Bluetooth headphones?
Yes. If your AirPods don't take over automatically, open Settings inside the app and use the Output Route picker to select them explicitly. After that, monitoring will route there for the rest of the session.
Will monitoring bleed into my recording?
No. The monitor signal goes to your headphones only — it's a separate path inside the audio engine and is never written to the file. The monitor volume slider in Settings is independent of the recorded level.
What does the filter do, exactly?
It places a touch-controlled high-pass or low-pass filter inline between the mic input and the recording path. Drag on the waveform to adjust the frequency (X axis) and resonance (Y axis). Tap the corner pill button to cycle between HPF → LPF.
What's the little flag icon next to the record button?
Tap the marker button during recording and a cue point is dropped at the current position. Markers are stored alongside the recording so you can find moments of interest later. Experimentalist tip: you can use markers as a quasi-sampler during playback. Also try scrubbing during playback for even more experiemental sounds!
What's the pitch readout for?
It's a built-in tuner (the same algorithm used in our
StrobeTuner app) that shows note name, octave, and cents offset live as long as the app is open. A very early beta tester requested feature! ;) Useful for confirming an instrument is in tune mid-take, or to know "what key is that drone in?"
Does Field Recorder Pro support external audio interfaces?
Not yet. Currently the app's inputs are only the iPhone's built-in mics and their polar patterns. Support for external interfaces is on the development roadmap. If you regularly use a specific interface or microphone,
let us know.
Does Field Recorder Pro work without an internet connection?
Yes. Everything — recording, monitoring, metering, filtering, pitch detection — runs entirely on-device. No internet required, ever.
Is my data private? Are my recordings private?
Absolutely. Field Recorder Pro does not collect, store, or transmit any personal data, and your recordings stay on your device unless you choose to share them. The app contains no analytics, no ads, no accounts, and no trackers. We cannot recover lost recordings. See our
Privacy Policy for full details.