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Hi @baync180705 @mohitvermax ,
I’ve implemented the preset save & load functionality as discussed:
initail presets

SAVING PRESET GIVE A DOWNLOADABLE JSON FILE

LOADING IT WITH THE LOADED PRESET

Centralized all synthesizer parameters (ADSR, EQ, waveform, octave, rawWave) into a single synthState object.
Added Save Preset feature to export current settings as a JSON file with a timestamp.
Added Load Preset feature to import JSON presets and restore all synth settings.
Wrapped file parsing in try…catch and added basic validation for safety.
Added simple alert feedback for successful save/load or errors.
The core functionality is complete and should meet the original requirements. Optional enhancements like toast notifications, localStorage, and a “Reset to Default” button can be added in the next iteration.
Looking forward to your review!