BIAS reports that Peak Pro 5 offers one of the highest quality resampling algorithms in the industry. After testing eleven audio applications and comparing their results, Peak Pro 5’s sample rate conversion proves to be one of the very best on the market.

“Sample rate conversion, also known as resampling, is one of the most important yet least understood stages in the final audio processing stage,” said Steve Berkley, CEO and President for BIAS, Inc. “With many professionals recording at high sample rates, fidelity is often lost at the final processing stage due to sample rate conversion that results in aliasing, artifacts, and added noise. Since many users depend on Peak for professional processing, BIAS prioritized the development of an advanced real-time and offline resampling algorithm for Peak Pro 5.

Eleven Applications Tested

A white paper detailing the results of testing that compared resampling results from eleven audio applications to that of Peak Pro 5, is available on the BIAS Web site.

Instructions for reproducing the tests along with test files enabling other interested parties to see for themselves how the results were obtained are included. The graphs in the white paper illustrate the varying results and demonstrate that Peak Pro 5 offers one of the highest-quality software based sample rate conversion algorithms.

Bias summarizes their results like this:

“We performed spectrogram analysis for four scenarios of sample rate conversion: 96 kHz to 44.1 kHz, 48 kHz to 44.1 kHz, 44.1 kHz to 48 kHz and 44.1 kHz to 96 kHz. Conversions were performed with twelve different audio applications including BIAS Peak Pro 5.

Spectrograms show that Peak Pro 5 provides extremely transparent SRC for all conversion scenarios, adding no artifacts such as spurious frequency components from aliasing, broadband noise from numerical errors, or any kind of distortion. If any of these artifacts occurred, we would see brighter colors on the deep-blue background in the spectrogram. We have purposely increased the spectrogram color resolution at very low levels (deep blue directly transitioning into light blue in the color map) in order to detect very low-amplitude aliasing or other artifacts added by the SRC algorithms. Still, the Peak Pro 5 spectrograms display an impeccable blue background, showing the excellent quality of the sample rate conversion algorithm.”

Pricing & Availability

Bias Peak Pro 5 has an SRP of $599 US. Peak Pro XT 5, which includes SoundSoap Pro & SoandSoap 2 (acclaimed restoration software), plus the Master Perfection Suite – a collection of analysis, processing, and mastering plug-ins – is available for $1199 SRP, and the light edition, Peak LE, is available for $129 SRP.