How to record audio to get the best transcription

Why recording quality affects transcription accuracy

Transcription systems, including AI-based ones, work by analyzing sound waves to identify words. When the audio is clear, the system can better distinguish phonemes and separate voices from noise. When the audio is flawed, typical problems show up:

• Words transcribed incorrectly or swapped for similar-sounding ones.
• Sections marked as inaudible or simply left out.
• Difficulty telling speakers apart in conversations with multiple people.
• Errors piling up across entire sentences when the volume is too low.

Spending a few minutes preparing the recording drastically cuts down the time you'll later need to spend reviewing and correcting the text.

Choose the right device and microphone

You don't need professional equipment to get a good result, but a few options are worth considering:

• External or lavalier microphone: if you're recording interviews or in-person meetings, an external microphone captures voice much better than a phone or laptop's built-in mic.
• Properly positioned phone: if you're using a smartphone, place it close to the speaker (ideally within 12 inches) and make sure it isn't muffled inside a pocket or case.
• Headset with a microphone: for calls or video calls, a headset mic usually performs better than a laptop's built-in microphone, which tends to pick up more echo and ambient noise.
• A single central microphone works fine for small meetings, but in larger rooms or with speakers spread far apart, it's better to use one microphone per person or a quality omnidirectional mic.

Set up your recording environment

The environment matters just as much as the microphone. Before you start recording, check these points:

• Cut down background noise: close windows, turn off noisy fans or AC units, and silence notifications on nearby devices.
• Avoid rooms with echo: very empty spaces or rooms with hard surfaces (glass, tile) create reverberation. If possible, record in a room with rugs, curtains, or furniture that absorbs sound.
• Keep a consistent distance from the microphone: maintain a steady distance between your mouth and the mic throughout the recording; sudden volume changes make transcription harder.
• Do a quick test: record a few seconds before the actual session and listen back to confirm the volume and clarity are right.

These steps matter especially for interviews, lectures, podcasts, or remote meetings, where you often can't just re-record if something goes wrong.

Technical settings: format, sample rate, and bitrate

Beyond the environment, a few technical parameters help the file retain the information needed for an accurate transcript:

• File format: lossless or lightly compressed formats like WAV or FLAC preserve more detail than a heavily compressed MP3, although a good-quality MP3 is usually enough for most everyday uses.
• Sample rate: 44.1 kHz or 48 kHz is a common standard and well suited to voice recordings.
• Bitrate: in compressed formats, a higher bitrate preserves the nuances of voice better; avoid aggressive compression meant purely to save storage space.
• Mono vs. stereo: for a single speaker, mono is usually enough; for interviews with multiple people, stereo recording can help distinguish speakers better when processed correctly.

If you're recording through an app or video-call platform, check its audio settings and enable the highest recording quality option if one is available.

Best practices for recording conversations with multiple speakers

Conversations with several participants benefit the most from good recording technique, since separating voices is one of the hardest tasks for any transcription system:

• Ask participants to speak one at a time and avoid interrupting each other, especially at the start of the recording.
• If possible, have each person identify themselves verbally at the beginning (for example, stating their name) to make speaker identification easier later.
• In video-call meetings, encourage attendees to mute their microphone when they're not talking to cut down background noise.
• Avoid recording outdoors in wind or traffic noise unless you have proper microphone protection.

Once you've recorded the audio under these conditions, you can upload it to an automatic transcription tool like VOCAP, which lets you try it out with free minutes or purchase one-time packs with no subscription required, and see for yourself how much cleaner source audio improves the accuracy of the resulting text.