The Complete Guide to Audio Formats & Settings
Last updated: June 2026
The right format and settings are the difference between a crisp, professional file and one that is bloated or needlessly lossy. This guide explains every control in the converter — format, bitrate, sample rate, bit depth, channels, compression, and loudness — with pro recommendations for each use case. Everything runs locally in your browser, so your files never leave your device.
Which Audio Format Should You Use?
Short answer: use MP3 or AAC for everyday sharing and playback, and WAV or FLAC when you need lossless quality for editing or archiving.
There are two families: lossy formats (MP3, AAC, OGG, Opus) that shrink files by discarding inaudible data, and lossless formats (WAV, FLAC, AIFF) that preserve every sample. Use lossless when you will edit or archive; use lossy for sharing and playback.
Bitrate: How Much Data Per Second
Short answer: 192–256 kbps is ideal for music, 320 kbps is the MP3 maximum, and 96–128 kbps is enough for speech and podcasts.
Bitrate (measured in kbps) sets how much data a lossy format uses each second. Higher bitrate means better quality and larger files — but the returns shrink as you climb. For most music, 192–256 kbps is transparent to the average listener.
| Bitrate | Quality | Best for |
|---|
| 64–96 kbps | Basic | Audiobooks, speech, low bandwidth |
| 128 kbps | Good | Podcasts, casual listening |
| 192 kbps | Very good (recommended) | Everyday music, general use |
| 256 kbps | Excellent | High-quality music, AAC sweet spot |
| 320 kbps | Maximum (MP3) | Critical listening, lossy archiving |
VBR vs CBR: Variable bitrate (VBR) spends more data on complex passages and less on silence, giving better quality per megabyte — ideal for downloads. Constant bitrate (CBR) keeps a fixed rate for predictable file size and smoother streaming or broadcast.
Sample Rate & Frame Rate
Short answer: use 44.1 kHz for music and 48 kHz for video. Match the source — upsampling never adds quality.
The sample rate (Hz) is how many times per second the audio is measured — sometimes loosely called the audio "frame rate." It sets the highest frequency that can be reproduced (roughly half the sample rate). Match your source; upsampling never recovers detail that was not captured.
| Sample rate | Standard | Use for |
|---|
| 22,050 Hz | Half-CD | Voice, speech, smallest files |
| 32,000 Hz | Broadcast | FM-quality voice and radio |
| 44,100 Hz | CD audio | Music — the safe default |
| 48,000 Hz | Video / film | Audio for video, podcasts to video |
| 96,000 Hz | Hi-res | Production and mastering headroom |
Bit Depth & Dynamic Range
Bit depth controls the resolution of each sample and therefore the dynamic range — the gap between the quietest and loudest sound before noise or clipping. It applies to uncompressed and lossless formats like WAV and FLAC.
16-bit
~96 dB range. CD quality — the right choice for final delivery and streaming.
24-bit
~144 dB range. Studio standard; gives headroom for editing and mixing.
32-bit float
Practically unclippable. Best for production and mastering pipelines.
Mono vs Stereo: Channels
Channels decide how many independent audio streams the file carries. The right choice halves your file size or adds spatial width.
Mono
One channel, half the size. Ideal for voice, podcasts, interviews and phone recordings.
Stereo
Two channels with left/right width. The standard for music and immersive audio.
Tip: Converting stereo speech to mono roughly halves the file with no perceived loss. Converting mono to stereo does not add information — it just duplicates the single channel.
FLAC Compression Levels
FLAC compression is lossless at every level — the decoded audio is bit-for-bit identical. The level only trades encoding time for file size.
| Level | Speed | File size | Use for |
|---|
| 0 | Fastest | Largest | Quick batch archiving |
| 5 | Balanced (default) | Smaller | The recommended all-rounder |
| 8 | Slowest | Smallest | Maximum space saving |
Loudness Normalization (LUFS) by Platform
Streaming platforms automatically turn tracks up or down to a target loudness measured in LUFS. Normalizing to the right target before you upload keeps your mix sounding as intended instead of being altered on playback.
| Platform | Target loudness |
|---|
| Spotify | −14 LUFS |
| Apple Music | −16 LUFS |
| YouTube | −13 LUFS |
| TikTok | −14 LUFS |
| Instagram | −11 LUFS |
| SoundCloud | −9 LUFS |
| Facebook | −18 LUFS |
Best Settings by Use Case
Podcast & spoken word
Speech is mono and forgiving on bitrate. Normalize for consistent volume across episodes.
MP3 · 128 kbps · mono · −16 LUFSMusic streaming upload
Deliver a lossless master and let the platform encode. Avoid uploading an already-lossy file.
WAV / FLAC · 44.1 kHz · 24-bitAudio for video
Video uses 48 kHz throughout. Keep stereo and avoid sample-rate mismatches that cause drift.
WAV / AAC · 48 kHz · stereoMusic production & sampling
Work in lossless with headroom; FLAC is great for compact sample libraries.
WAV 24-bit · 44.1/48 kHz · stereoVoice memos & archiving
FLAC keeps recordings lossless but small. For quick sharing, a low-bitrate mono MP3 is fine.
FLAC · mono · or MP3 96 kbpsSocial media (Reels / TikTok)
AAC gives the best quality per megabyte. Normalize to the platform target so your audio is not turned down.
M4A / AAC · 256 kbps · 48 kHzFrequently Asked Questions
What is the best audio format for quality?
For perfect quality, use a lossless format like FLAC or WAV — they preserve every sample. Among lossy formats, AAC (M4A) generally sounds best at a given bitrate, followed closely by MP3 at 256–320 kbps.
What bitrate should I use for MP3?
192 kbps is the recommended sweet spot for everyday music. Use 256–320 kbps for critical listening, and 96–128 kbps for spoken word where smaller files matter more than fidelity.
Is 320 kbps always better than 192 kbps?
Not noticeably for most listeners or sources. Beyond ~192–256 kbps the gains are diminishing and depend heavily on the original recording. 320 kbps mainly helps for archival or when re-encoding may happen later.
WAV or FLAC — which should I choose?
Both are lossless and sound identical. Choose WAV for maximum compatibility in editing software; choose FLAC to store the same audio in 40–60% less space with tags and cover art.
Does converting between lossy formats lose quality?
Yes. Each lossy encode discards data, and transcoding (for example MP3 to AAC) stacks that loss. Whenever possible, convert from a lossless source such as WAV or FLAC.
Can I improve quality by raising the bitrate or sample rate?
No. Upsampling or increasing bitrate cannot recover detail that was never recorded or was already discarded — it only makes the file larger. Match the source instead.
Are my files uploaded anywhere?
No. Conversion runs entirely in your browser on your device. Common MP3 and WAV jobs use the browser's built-in audio engine instantly, and heavier formats use an on-device engine. Nothing is sent to a server.
