The Music Speed Changer app allows you to easily change the playback speed and the pitch (key) of audio in real-time and independently from each other. The app also supports video (with zooming), subtitles (e.g. for karaoke), images (e.g. for scores), and text. Help: http://www.tequnique.com/apshelp Full version: https://itunes.apple.com/us/app/audio-pitch-and-speed-player-pro/id1236781145?ls=1&mt=8 ++ If you experience stops during playback then increase the buffer size in the app's settings. ++ ## Features Lite ## - Change pitch and tempo (speed, time-stretch) independently and in realtime using time and frequency domain algorithms. - Create range and position markers. - Volume amplification, and simple voice reduction. - Channel selection (left/right). - Record audio directly in the app. - Import various formats including mp3, wav, m4a, ogg, aac, mp4 video,... - Import audio from: media gallery, iOS "Open in" (supported by many apps, including DropBox), iTunes File Sharing (USB), and Wifi upload. ## Features Pro ## - Loop and select regions. - Export/share and import songs with annotations (for instance for for sharing between music teachers and students). - Playlists. - Video view* with zoom support (for instance to get an exact view on a guitar player's hand). - Text view with auto scrolling and monospace font support (e.g. useful for tabs). - Subtitles view to show subtitles (for instance for karaoke). - Image view with zoom support (for instance for displaying scores in image format). - Export modified audio to wav, mp3, m4a, and flac. - Batch conversion of files. - Frequency conversion (for instance to 432Hz). * An iPhone 6 or better is recommend for the best video experience. The recommended video resolution is 720p. Use cases: music instrument training by adjusting tempo and pitch to anytune, transcription, karaoke, ...