Updated October 2026 · Field recording and nature sounds
Field recording sessions can fail through a flat battery or a full card as easily as through bad sound. Estimate the power and storage for each session, carry spares, format cards before the session and check the level of both at intervals. A simple plan prevents losing the best moment to a practical problem.
The best field recording is worthless if the battery dies at the moment a bird begins to sing, or the card fills up as the rain reaches its peak. Power and storage are the practical limits of every session, and they are easy to forget when the excitement of the location takes over. A few minutes of planning, done before leaving home, prevents most of these problems.
This post explains how to estimate power and storage, how to carry spares, how to manage files on location and how to check the equipment during a long session.
Battery life depends on the recorder, the settings, the phantom power, the display and the temperature. Check the manufacturer’s figure, but treat it as a best case. Test the battery life with your own settings, for a session of the length you plan. Record the result, so you can plan future sessions more accurately.
Carry at least one spare battery or a power bank, and charge everything fully the night before. A spare that is charged and ready is the simplest insurance against a dead recorder. If your recorder runs on removable batteries, carry fresh ones, and keep the spares in a case that protects their contacts.
Storage depends on the format, the sample rate and the length of the session. A high-quality format at a high sample rate fills cards quickly, and a long session can need several gigabytes. Calculate the space you need before the session, and carry more cards than you think you will use. Cards are cheap compared with a lost recording.
Format each card in the recorder before the session, not on a computer, so the file system matches the device. Check that each card is empty and works. Keep a list of which card has which session, and label the cards clearly so they are never confused.
Name files as you go, with the date, the time and the place. Create a new file for each take or each segment, so a fault affects only one file. Check the files during breaks, playing a short section to confirm that the recording is working. A file that has silently failed is the worst surprise to discover at home.
Check the battery and the storage at regular intervals, and watch the level indicator for any sign of trouble. A recorder that shows a warning may be about to stop, so act on it. Keep the device warm, as cold drains batteries, and turn off any display or function you do not need to save power.
Charge the recorder, insert the card, record a short test and play it back on the device you will use for editing. Check the file names, the levels and the time stamp. A problem found at home takes minutes to fix. The same problem found in the field can cost the whole session.
If you can, copy the files to a second card or a small drive before you leave the site. A bag can be lost, a card can fail and a transfer can go wrong. A copy made in the field costs little, and it protects a recording that cannot be repeated.
Decide before you leave how much recording you expect, and bring cards that cover that time with some margin. Label each card with its capacity and the date it was formatted, so you can see at a glance which card is ready. If a card shows errors, stop using it and check it at home before reusing it, since a card you are unsure of should not be relied on for a session that cannot be repeated.
Battery and storage estimates are approximate, and conditions vary. Plan with a margin, and accept that a long session may need an extra battery or card. The aim is to prevent avoidable failures, not to remove every risk.
Once a session is done, back up the files as soon as possible. The backup post in this series explains the routine, and the Noise-Free Voice Recorder can clean a recording you own. For the planning side of field work, read the field recording post.
Record voice-overs with live noise removal, or clean an existing file. Runs in your browser, nothing is uploaded.
At least one spare or a power bank, charged and ready, for any long session.
Calculate from the format, sample rate and length, then carry more cards than you expect to use.
Better not. Format the cards in the recorder so the file system matches the device.
A fault affects only one file, not the whole session, so the rest of the recording survives.
