By default, the voice notes app on your iPhone records audio in a compressed format. This saves space on your iPhone, but reduces the quality of the recording. You can switch to a lossless mode for maximum fidelity.
By default, your iPhone records voice memos in a compressed format. However, if this does not affect the mustard, you can switch to lossless recording instead. It's not clear which file format your iPhone uses here, but suffice it to say that it consumes more disk space than a compressed AAC file. Bear this in mind, but considering that most voice notes are likely to be rather short, we do not believe that this will have much impact.
How to Select Lossless Footage
As always with iOS, the setting we are looking for is in the Settings app. Open it and tap Voice Memos to get started.
Next, tap Audio Quality at the bottom of the screen.
The next screen offers two options. Tap "Lossless" to get the best sound quality from your recordings. However, if space is your primary concern, we recommend staying with "Compressed" and leaving everything as it is.