SoundBud: Chord & Key Finder
Master audio, video, podcast
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Musicians: decode any song into key, BPM and chords, then play it.
Creators: master your audio and video for Spotify, TikTok and YouTube. No PC, AI guided.
Hear a song, decode it. Record your voice or drop in a video, polish it. SoundBud is a pocket studio for musicians, podcasters and creators.
Record, upload a file, or share audio and video from any app. About a minute later you have the key, BPM, time signature and the full, timestamped chord progression. Play it back, practice it, and get your recording or video ready to publish without a computer.
DECODE ANY SONG
- Record up to 5 minutes, or upload MP3, WAV, M4A, FLAC, AAC, OGG, AIFF and more
- Drag the waveform to pick the 15 to 60 seconds to analyze
- Genre, instrument and song recognition (Premium)
- Tap a value to correct it. Your ear gets the last word.
PLAY AND PRACTICE (Premium)
- Synth Chords: hear the progression played in time
- Slow-Downer: 1x, 0.75x or 0.5x, pitch untouched
- Section Looper: tap measures to loop the hard part
- Transpose chords and key up to 6 semitones either way
- A metronome that follows playback
- MIDI export: block chords, or a note-by-note transcription made on your phone
- Free on the record screen: a chromatic tuner and a tap-tempo metronome
FOUR AI THEORY MODES
- Theory Analysis: Roman numerals, harmonic function, tonal center and a practical tip
- Solo Guide (Premium): a scale for every chord, target notes, guide tones, tensions and licks
- Reharmonize (Premium): tritone subs, secondary dominants, passing diminished chords, color chords and a wild-card idea
- Explain Simply (Premium): the song in plain words, with play-along ideas
Color-coded chords and a lead sheet that follows playback.
POLISH ANY SOUND, EVEN VIDEO
Free: on-device noise reduction, ducking (music dips while you talk) with a preview, Bass/Mid/Treble EQ, a one-slider compressor, AI Tips, lossless trim, A/B preview, undo, a ready-to-publish check, plus EQ 101 and Compressor 101 guides.
Premium opens the full studio:
- Live EQ and Live Compressor: drag the curve while your audio plays and hear every move, with a live spectrum and a gain-reduction meter
- 6-band EQ with adjustable frequency and Q, plus 3 slots for your own presets
- Manual compressor with threshold, ratio, attack, release and knee, before or after the EQ
- AI Tips that apply the exact frequency, Q and compressor settings in one tap
- Voice-Over Suite: de-esser, breath removal, clarity, room tone reduction, auto-level, click repair, de-hum, exciter
- Tighten: cut long pauses from talk recordings in one tap
- Loudness and true-peak targets for Spotify, Apple Music, YouTube, TikTok, Instagram and podcasts, with a limiter
- As many videos as you like, up to 30 minutes each: the picture stays untouched, the sound comes back clean
- Audio files up to 90 minutes, WAV or MP3 export
CREATE AND SHARE
- Sound-reactive visuals, customizable and exported as video
- Quick music theory quiz cards while you wait
LIBRARY
Save decoded tracks, then search, sort, replay and edit them. Export a PDF lead sheet with chords, theory and AI insights (Premium).
English and Turkish. Note names as C D E or Do Re Mi. Requires iOS 15.1 or later.
FREE AND PREMIUM
Free includes 4 song decodes a week, 1 Theory Analysis a day, 5 polished audio exports a week, 5 library saves a month, plus 1 polished video and 1 video export a month (Spectrum Bars visual, watermarked).
Premium removes these limits and unlocks everything marked Premium above, plus every visual and watermark-free video. No ads.
Premium is a monthly or yearly subscription. It renews automatically unless canceled at least 24 hours before the current period ends. Manage or cancel it anytime in your App Store account settings.
Privacy: only the part you choose to analyze is uploaded, and it is deleted after processing. Polish runs on your phone, and AI features never receive your audio.
Terms: https://soundbud.alpaconaudio.com/en/legal#terms
Privacy: https://soundbud.alpaconaudio.com/en/legal#privacy
Support: info@alpaconaudio.com
Ratings & Reviews
What's new in 6.1
- Live EQ and Live Compressor (Premium): shape your sound while it plays. Drag points on the curve, watch the spectrum move, and see exactly how hard the compressor is working.
- Sharper AI Tips: they now check 19 frequency bands, point to the exact frequency worth fixing, and let you apply their suggestions in one tap (Premium also sets frequency, Q and compressor values). The measurements behind the tips and the ready-to-publish check are more accurate too.
- See where the music dips before you export: the music waveform shows every dip, zoomed in on the part that plays under your voice. The music now dips reliably under quiet or heavily compressed voices, too.
- Ducking fixes: if the song ends before your recording, its fade-out now plays and your voice stays at the same level.
- More control (Premium): frequency and Q for the Bass, Low Mid, Mid and Treble bands, up to 3 saved presets, a knee control, and your choice of EQ before or after the compressor.
- New signal chain map and tonal balance bar. New to EQ or compression? Tap "?" for the EQ 101 and Compressor 101 guides.
Thanks for making things with SoundBud!
The developer, Alp Kurbetci, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Alp Kurbetci
- Size
- 105.8 MB
- Category
- Music
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- SoundBud Premium (Monthly) $3.99
- SoundBud Premium (Yearly) $34.99
- Copyright
- © 2026 Alpacon Technologies

