AudioSauna is a MP3 & Audio software developed by Naive Solutions. After our trial and test, the software is proved to be official, secure and free. Here is the official description for AudioSauna:

Synthesizers
AudioSauna sets a new standard for the quality of audio synthesis in the cloud.

Quality Filters
All instruments feature various filter types including LPF and HPF.

Built in Effects
Multiple effects including: Distortion, Chorus, BitRate, Reverb and Delay.

Well-thought Presets
Soft strings, fat basses, vintage organs and screaming leads. AudioSauna has it all.

Jam With Keyboard
Use your computer's keyboard to play and record melodies with Audiosauna.

Sequencer
Microstepping sequencer with advanced editing features.

Features:

AudioSauna is a full-featured Audio Workstation with an easy-to-use and straightforward user interface. It enables using several advanced polyphonic synthesizers, samplers and live effects in real-time in the browser.

AudioSauna's virtual analog synth is a classic two oscillator subtractive synthesizer.

AudioSauna's FM-synth brings the classic 80's sound to the browser!

We believe its the most advanced stereo sampler of all the online audio applications.