Spectra - SFZ Player

Spectra is a virtual instrument player for iPhone and iPad, built for instruments in the SFZ format. It turns your iPad or iPhone into a powerful rack with up to 32 simultaneous sounds, controlled by a MIDI keyboard, with a mixer, per-channel effects, and global reverb. Designed for live performance, studio recording, and rehearsals.
Connect a MIDI keyboard — using a Camera Connection Kit, USB-C, Bluetooth MIDI, or a USB MIDI interface. The app detects it automatically.
Open Spectra.
Play!
Features:
Play with up to 32 simultaneous channels, creating layers, splits, and instrument combinations for different musical situations.
Save and load setlists/presets with all instruments, volumes, effects, MIDI mappings, and setup configurations.
Load SFZ instruments directly from the Files app, iCloud Drive, or AirDrop.
Control the app with a MIDI keyboard via USB-C, Camera Connection Kit, USB MIDI interface, or Bluetooth MIDI.
Use a complete mixer with individual volume, mute, real-time audio meters, and reverb send control.
Shape each sound with editing tools such as pan, velocity curve, MIDI channel, MIDI Learn, EQ, filters, tone modifier, and compressor.
Create setups with specific MIDI channels or OMNI mode, ideal for using multiple keyboards, zones, splits, and live performances.
Global Reverb.
Enable Prevent Screen Sleep mode to keep the screen on during performances.
Adjust the audio buffer to balance latency and performance according to your device.
Use the Panic button to immediately stop stuck notes during a performance.
Spectra was built for musicians who need a practical, portable, and reliable setup to play with high-quality sound anywhere.