Audio Recording Equalizer. Bass Preset: lower frequencies (e.g., 20 Hz - 250 Hz). Middle Preset: mid frequencies (e.g., 250 Hz - 4000 Hz). Treble Preset: higher frequencies (e.g., 4000 Hz - 20000 Hz). Instructions: -Start record button just works after import an audio file. -To start record equalization's sound you must press start record button and press again to stop and export. -In resume, the recording works between the start and the stop to download pressed button. -Equalize before or live. -Refresh the page to new audio equalization. -Read .m4a and .mp3 on IOS, but don't record or download. -And must be connected to internet. -You just have to pay to more than 3 Set Pointer and Save Pointer demands (1 Euro).

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@Buzyart-Duarte Caeiro