Audiofile Calc vs ComposerDeck

The audio engineering calculator you've relied on for years — completely reimagined. Audiofile Calc has been rebuilt from the ground up with a modern interface, ergonomic controls, and a new Calc Pro tier that takes your calculations further. Now with a free dB Converter for instant decibel-to-ratio conversions, and Varispeed — the pitch shift BPM calculator our users asked for. FREE CALCULATORS Length – Note Length – Bar Length – Song Length – Beats to Tempo – Time to Samples – Samples to Time – Timecode to Time – Compare Tempos – Change Tempo – Add Times Pitch – Note Name to Frequency / MIDI / Wavelength – Frequency to Note Name / MIDI / Wavelength – Wavelength to Frequency / Note Name / MIDI Timecode – Frames to Timecode – Convert Timecode – Change Timecode Electric – Compare Power – Compare Voltage – NEW: dB Converter — turn any decibel value into its voltage (amplitude) and power ratios Acoustics – Distance to Time – Delay – Time to Distance – Sound Pressure Level (SPL) – Panning – PAG-NAG Files – File Size CALC PRO — $4.99 one-time Unlock a suite of advanced calculators built for professional engineers and producers: – NEW: Varispeed — tape-style and sampler speed changes, where tempo and pitch are coupled. Enter any BPM change and get the pitch shift in semitones, sampler-ready semitones + cents, and speed percentage – LUFS Target — streaming loudness compliance for Spotify, Apple Music, YouTube, and broadcast (EBU R128) – Nyquist Frequency — sample rate requirements, aliasing thresholds, anti-aliasing filter cutoffs – Equal Loudness — Fletcher-Munson curves, equal-loudness compensation – Cable Attenuation / Impedance — signal loss over cable runs, impedance matching – Batch Conversion — sweep values through any calculator simultaneously – PDF Share — export any calculation as a clean, professional PDF ready for clients, session notes, or technical documentation One-time purchase. No subscription. Audiofile is a boutique technology company building precision tools for the world's musicians and engineers.

Stuck staring at a blank track? ComposerDeck deals you a hand of musical challenges: a chord, a scale, a groove, a production trick, sometimes a Malus. Then you make something with it, in 20 minutes or over a weekend. Use it as a warm-up, a daily ritual or a way out of a rut. DRAW YOUR HAND More than 600 cards written by musicians, from beginner to expert. Pick a style, a number of cards and an optional Malus, then draw. Every card shows how rare it is (Common, Rare or Legendary) and every hand rates from Easy to Brutal. Lock the cards you love and redraw the rest. SIMPLE OR STUDIO Simple keeps the essentials. Studio puts every control around the same table: faders that steer the draw toward harmony, rhythm, sound or form, card types, decks, session length and notes. ADD A MALUS A Malus is a forbidden move. One Take. No Drums. Headphones Forbidden. It joins your hand, raises the difficulty and forces you to think sideways. DRAW FROM DECKS Load a curated deck (Songwriting Sprint, Chord Progression Starter, Odd Meters Bootcamp, Finish It) and pull your next hand from it. Build your own deck from any cards and share it with one link: your students or bandmates draw from it in one tap. HEAR WHAT OTHERS MADE Upload your take or paste a SoundCloud, YouTube, Spotify or Vimeo link. Every take stays tied to the hand it came from, so you can hear how someone else answered the same cards. Browse by Hot, New, Top, Following or Friends, and the player keeps going while you move around the app. THE WEEKLY CHALLENGE Once a week, everyone gets the same hand. Post your take and hear how the others answered it. The leaderboard shows who shares the most, who gets the most love and who takes on the toughest hands. ADD YOUR OWN CARD Got a card the deck is missing? Submit it. Once approved it joins the main deck, anyone can draw it, and your name goes with it. YOUR PROFILE A year of activity at a glance, your streak, the genres you lean on, and 20 badges to unlock as you draw, share and contribute. BUILT FOR MUSICIANS Producers, songwriters, beatmakers, composers, instrumentalists, singers, DAW lovers and hardware nerds. ComposerDeck doesn't make music for you. It gives you a starting point and gets out of the way. PRIVACY No ads, no ad tracking, and your data is never sold. Your takes stay yours and private profiles stay private everywhere. Draw without an account, or sign in with Apple or Spotify to keep your hands and favorites. Draw a hand. Make something. Share it. See you in the deck.