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# File formats
The original SFXR tool as well as SFXR-Qt up to 1.2.0 uses the SFXR file format.
This file format is a binary representation of the sound effect.
Since version 1.3.0, SFXR-Qt uses its own format: SFXJ. This file format uses
JSON to represent the sound effect. It is expected that JSON will make it
easier to process and extend the file format.
SFXR-Qt can still load SFXR files.
## SFXJ file format
This is what an SFXJ file version 1 looks like:
```
{
"version": 1,
"properties": {
"attackTime": 0,
"baseFrequency": 0.5019000172615051,
"changeAmount": 0.5941200256347656,
"changeSpeed": 0.5493800044059753,
"decayTime": 0.2362000048160553,
"deltaSlide": 0,
"dutySweep": 0,
"hpFilterCutoff": 0,
"hpFilterCutoffSweep": 0,
"lpFilterCutoff": 1,
"lpFilterCutoffSweep": 0,
"lpFilterResonance": 0,
"minFrequency": 0,
"phaserOffset": 0,
"phaserSweep": 0,
"repeatSpeed": 0,
"slide": 0,
"squareDuty": 0,
"sustainPunch": 0.46599000692367554,
"sustainTime": 0.05916000157594681,
"vibratoDepth": 0,
"vibratoSpeed": 0,
"volume": 0.5,
"waveForm": "Square"
}
}
```
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