Everything Pro gives you

Zero-latency A/B, with your own labels

Both versions play in perfect sync and the hold button flips which one you hear — mid-note, no gap, no fade. Custom labels are the Pro part: Free shows the raw filename.

• Hold the button, or just hold the spacebar
• Click a label to pin that version and hear it alone
• Seek anywhere — both tracks stay locked in time

Level matching

The louder version always sounds “better”, which quietly ruins most A/B comparisons. Trim either track in dB by hand, or hit auto-match to measure both files and level them for you.

• Per-track trim from −12 to +12 dB: 1 dB steps by hand, 0.1 dB with auto-match
• Auto-match reads true integrated loudness (LUFS, ITU-R BS.1770)
• Applied at playback only — your upload is never re-encoded
• Listeners on your link hear the matched balance and cannot change it

Player customization

Match the player to your studio brand: any accent colour, light, dark or the retro Nostalgiamp skin, and the audiotoggle™ credit on your embeds can go.

• Any accent colour, applied to the whole player
• Light, dark or Nostalgiamp, a late-90s desktop player skin
• Set per comparison — its share page and embed follow it

Embeddable player

Drop the A/B player into your portfolio or studio site with one iframe: a single slim line with your logo, the cover, the timeline and the hold button, in the style you configured. On Free an embed shows a placeholder card instead.

<iframe src="…/e/x7Kp2qWm9a"
  width="100%" height="120"></iframe>

Play & switch analytics

How often a comparison gets played, and how hard people work the A/B switch — a strong signal that the difference actually landed.

Your branding and cover art

Your profile picture and studio logo appear on every comparison you share, so the link looks like yours rather than ours. Each comparison can also carry its own cover art — on its share page, in the embed and in link previews.