Best Audio Format for Music Streaming

Streaming platforms re-encode everything you upload. Your source file quality determines the ceiling. Here's how to give platforms the best possible starting point.

What Platforms Want

Every major streaming service publishes format requirements:

• Spotify: WAV or FLAC, 16-bit or 24-bit, 44.1 kHz
• Apple Music: WAV or AIFF, up to 24-bit / 192 kHz
• YouTube Music: WAV or FLAC, 16-bit minimum, 44.1 kHz
• Tidal: WAV or FLAC, up to 24-bit / 96 kHz
• Amazon Music: WAV or FLAC, up to 24-bit / 192 kHz

The pattern is clear. Upload lossless. Always.

Why Lossless Matters for Streaming

Platforms transcode your upload into multiple quality tiers. Spotify, for example, creates:

• 24 kbps (very low quality)
• 96 kbps (normal)
• 160 kbps (high)
• 320 kbps (very high, premium only)

Each tier is encoded from your original upload. If you upload a 128 kbps MP3, the platform re-encodes that MP3. Double lossy compression. Quality suffers noticeably at lower tiers.

Upload WAV or FLAC, and each tier is encoded from a perfect source. The quality ceiling stays high.

Preparing Your Files

Step 1: Final Master

Your mastering engineer should deliver:
• 24-bit WAV (highest quality)
• 16-bit / 44.1 kHz WAV (CD standard)

Use the 24-bit version for streaming when the platform accepts it.

Step 2: Convert if Needed

If you have WAV files, convert WAV to FLAC for uploading. FLAC uploads faster (smaller files) with zero quality loss. Most distributors accept both.

If you only have FLAC, that's perfect. No conversion needed for most platforms.

Step 3: Verify

Check your files before uploading:
• Correct sample rate (44.1 kHz standard)
• Correct bit depth (16 or 24-bit)
• No clipping (peaks shouldn't hit 0 dBFS)
• Loudness normalized (target -14 LUFS for Spotify)

Loudness Standards

Streaming platforms normalize loudness. If your track is louder than the platform's target, it gets turned down. If it's quieter, it gets turned up.

• Spotify: -14 LUFS
• Apple Music: -16 LUFS
• YouTube: -14 LUFS
• Tidal: -14 LUFS

Master to -14 LUFS and you'll sound good everywhere. Mastering louder than -14 LUFS doesn't make your track louder on the platform -- it just increases distortion.

What NOT to Upload

Don't upload MP3. Ever. The platform will re-encode it. Double lossy compression is audible.

Don't upload at wrong sample rates. If the platform expects 44.1 kHz and you send 48 kHz, it gets resampled. Upload at the expected rate.

Don't upload clipped audio. Digital clipping creates permanent distortion that no encoding can fix.

Creating Preview Clips

Need to share previews of streaming tracks? Convert WAV to MP3 at 256 kbps for email previews and press kits. Convert FLAC to MP3 works too.

These preview MP3s are just for sharing. The platform gets the full lossless file.

Distribution Services

Most artists use aggregators (DistroKid, TuneCore, CD Baby) to reach streaming platforms. These services accept:

• WAV (always accepted)
• FLAC (widely accepted)
• Sometimes AIFF

Upload the highest quality file your distributor accepts. They handle delivery to each platform.

The Bottom Line

Upload lossless. Convert to FLAC if you need smaller upload sizes. Master to -14 LUFS. Check your specs. Let the platforms handle transcoding from the best source you can provide.

Your listeners on premium tiers will hear the difference. Your listeners on free tiers benefit from a better source too. Start lossless. Always.