SynthBridge - MIDI Synthesizer

Connect BLE, USB and Core MIDI gear, load SF2/SF3 sounds, play low-latency keys and pads, map MIDI CC, and record ideas on iPhone or iPad.

SynthBridge turns your iPhone or iPad into a flexible MIDI sound module, virtual piano and SoundFont player for practice, production and live performance. Connect a keyboard, pad controller or another MIDI app, load SF2/SF3 sounds, and play with responsive controls built for mobile music making.

MIDI synthesizer and controller support

• Bluetooth MIDI (BLE), compatible USB/Core MIDI devices and network MIDI sessions
• Multiple MIDI inputs for keyboards, pads and controllers
• MIDI CC mapping for master volume, modulation, volume, pan, expression, sustain, reverb, chorus, bank and program changes

SoundFont engine

• Load SF2 and SF3 SoundFont files
• Built-in GeneralUser-GS SoundFont
• 16-channel multi-timbral playback
• Per-channel instrument, volume, pan, reverb and chorus settings
• Quick presets for fast instrument switching

Expressive performance tools

• Multi-touch piano keyboard
• Switchable portrait layouts, including dual keyboard and drum pad modes
• 8 programmable drum pads
• Pitch bend and modulation wheels
• Global semitone transpose with mini-screen status
• Custom velocity curves for controller response
• Metronome with adjustable BPM

MIDI player and recording

• Play standard MIDI files (SMF)
• Browse and manage local MIDI songs
• Real-time audio recording
• Export recordings as WAV or AAC
• Export MIDI performance data

Privacy and purchases SynthBridge processes MIDI and audio locally on your device. Optional purchases are handled through Apple In-App Purchase. The international edition may use Firebase services for stability, performance diagnostics and product analytics. See the privacy policy for details.

Requires iOS or iPadOS 15.0 or later.