PlayFlow: Musician Toolbox for YouTube

PlayFlow is a musician's toolbox built right into YouTube. Practice any song with independent pitch and speed control, loop tricky sections, and stay in the flow — all without leaving the video.

# Pitch Control
• Shift pitch from −12 to +12 semitones
• Change the key without affecting playback speed
• Match any song to your voice or instrument

# Speed Control
• Adjust playback from 0.25× to 2.0×
• Fine-tune in 0.05× increments
• Slow down fast passages for note-by-note practice

# A/B Loop
• Set A (start) and B (end) points to loop any section
• Type exact times or set from the current position
• Arrow-key fine adjustment (±1 second)

# Smart Loop
• Automatically increase speed after each loop cycle
• Set the speed increment per loop (e.g. +0.05×)
• Set a max speed — PlayFlow stops raising once you reach it
• Build up to full tempo gradually without touching a single control

# Count-in
• Audible count-in (3-2-1) before each loop begins
• Choose 1 or 2 bars — matches the current BPM and speed
• Visual overlay on the video player so you never miss the downbeat

# Metronome
• Built-in click track synced to playback speed
• Tap Tempo — tap the button to detect BPM instantly
• Manual BPM input (40–300)
• Live display of the effective BPM at current speed

# 3-Band EQ
• Low / Mid / High shelving and peaking filters
• ±12 dB range with 0.5 dB steps
• Cut bass to hear melody, boost mids for vocals, or shape tone to taste
• EQ preset saved automatically — persists across sessions

# Floating UI
• Draggable control panel overlaid on YouTube pages
• Minimize to a tiny bar to keep screen space
• Stays open across page navigation within YouTube
• All controls sync with the popup in real time

# PERFECT FOR
• Musicians learning songs by ear
• Vocalists adjusting song keys
• Guitarists and pianists practicing riffs and solos
• Language learners slowing down speech
• Transcribers needing precise audio control
• Anyone practicing along with YouTube videos

# PRIVACY
• No data collection whatsoever
• Works entirely on your device
• No account or sign-up required

Works on youtube.com and music.youtube.com.