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This is the main reference point for anyone who wants to create virtual musical instruments using the SFZ format. Currently the SFZ 2 opcodes and ARIA extensions documented though some require more detail, and SFZ 2 opcodes not supported by ARIA still need to be added. There’s enough information to make complex SFZ instruments already, but we’ll continue to add more.

To make use of the SFZ format requires three things:

which tells the player how to use the samples. The SFZ file itself can be created using any text editor, though for more complex cases with hundreds or thousands of samples, additional tools can make this easier - some people use spreadsheets, and there are also dedicated SFZ creation tools.

The SFZ format is a file format to define how a collection of samples are arranged for performance. The goal behind the SFZ format is to provide a free, simple, minimalistic and expandable format to arrange, distribute and use audio samples with the highest possible quality and the highest possible performance flexibility. Soundware, software and hardware developers can create, use and distribute the SFZ format files for free, for either free or commercial applications.

Making Instruments

Text guides on how to make a simple instrument, covering the essential opcodes

  • Drum basics - covers global, group and region headers, sample, key, lovel / hivel, amp_velcurve_N, seq_length, seq_position and lorand / hirand.

  • Sustained note basics - using a flute as an example. Adds lokey / hikey, pitch_keycenter, xfin / xfout, locc / hicc, keyswitching, group, off_by and off_mode.

Some more advanced topics

  • Vibrato - currently describes basic bowed string vibrato, will be expanded later to include other instruments and also filter wobble.

  • Legato - currently simple glides, will be expanded later to include true sampled legato.

  • Cymbal muting - using group, off_by, off_mode and polyphony to make hi-hat and cymbal notes mute previous notes in a musically useful way.

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