Fiestable is an application that allows you to control the music player built in to Sony’s Home Audio System. It’s designed to allow users to control audio effects like volume, bass, etc. It's available as a free app on the Play Store.

The control interface is based on a concept of "DJ Effects" where users can control the effects of various devices like a DJ would do with his turntable, turntable mixer, and CD player.

The DJ Effect can be applied to various devices including samples, drums, and effects. 

As for the DJ Effect Sampler, the app will record your voice and play it back. This allows users to create a DJ-style recording where they can play the recorded audio back to the others.

There's a microphone and speaker on the device that users can use to record their voice and play it back through the speaker or headphones. The recorded voice can be either played back or saved as a file.

Fiestable offers various effects like:

Volume: Adjusts the volume.

EQ: Adjusts the tone of the device.

Pan: Adjusts the sound from left to right.

Mute: Mutes the device.

Reverb: Adjusts the effect of the reverb of the device.

Waves: Adjusts the sound of the waves of the device.

Frost: Adjusts the effect of the fluttering sound of the device.