On occasion MP3s will contain a certain amount of undesirable audio artifacts called hiss. Hiss is a sharp sibilant sound typically presented as a broadband high-frequency noise in the sound spectrogram. This artifact can often be found in MP3 archives of vinyl records. Hiss reduction leads to much clearer and transparent sounds. SX Fidelity Amplifier contains an integrated function, capable of reducing unwanted noise and hiss in MP3 and other digitally encoded files as part of its approach to improved fidelity.
In contrast with typical noise filtering tools available for MP3s, the SX Fidelity Amplifier utilizes proprietary sound analysis and audio restoration algorithms for adaptive fitting for non-stationery noises substantially reducing and in most cases completely eliminating the hiss effect.
Certain popular MP3 sound editors contain hiss reduction tools which require a lot of manual tuning for partial removal of stationary hiss. SX Fidelity Amplifier on the other hand provides the option of fully automatic sound cleaning of music streams, including MP3, WMA, AAC or other formats. There is a single control button that allows simple adjustment of noise and hiss reduction strength to accommodate the occasional change in the amount of hiss or noise in the audio stream.
Below are spectrograms, illustrating the process of hiss reduction of an MP3 file.
MP3 With Noise (Hiss) |
Denoised MP3 |
 |
 |
Unwanted hiss is visually represented by the overall pink cast in the spectrogram above. |
In the spectrogram above SX Fidelity Amplifier has removed the noise from the same sample source. You can now see sharper definition in the wave patterns. Denoising produces a clearer more transparent rendition of the MP3 audio source. |
The above description uses an MP3 as the source file but SX Fidelity Amplifier can also be applied to any audio stream rendered through a PC.
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