この包括的なオンラインガイドは、お客様がDSM™スマートアンプソリューションを迅速に設計する上で役立ちます。このガイドの最初のセクションでは、技術の概要を説明します。マキシムのDSM技術に関する基本的な理解を促し、アイデアから設計、生産へと進むためのヒントを提示します。第2のセクションでは、DSMを実装した設計について説明します。第3の最終セクションでは、マキシムのDSM Sound Studio GUIによるMAX98390の評価システムの使用に焦点を合わせます。
LFX is a feature that empowers the design to safely extend the bass response significantly below the resonant frequency.
LFX is a true bass extension algorithm. It does not use distortion components to psychoacoustically enhance bass.
Controls for LFX include: Enable/Disable, Highpass Filter, Gain, and Q.
Dynamic Range Compressor (DRC)
MAX98390 includes a Dynamic Range Compressor.
DRC attenuates loud signals and amplifies low signals. This ensures that the listener is not jarred by loud sounds like guns firing or blaring advertisements while still being able to hear softer sounds like footsteps or a quiet voice.
Controls for DRC include: Enable/Disable, Compression Ratio, Compression Threshold, Noise Gate Threshold, Attack Time, Release Time, and Makeup Gain.
8-Band Parametric EQ
MAX98390 includes 8 bands of parametric equalization.
7 filter types provided:
Controls for EQ: Enable/Disable, Filter Type, Q, Gain, Fc.
A patented feature that helps address the buzzing inherent in some speaker designs.
Audio designs will often have mechanical buzzing due to the audio output interacting with the casing or mechanical design. In these cases, engineers traditionally employ a static notch filter, but this reduces the loudness (SPL).
Maxim’s Debuzzer technology employs a programmable, dynamic notch that maximizes SPL, which only attenuates when signal levels are high enough to stimulate buzzing.
Controls for Debuzzer include: Enable/Disable, Frequency, Q, and Threshold.
Perceptual Power Reduction (PPR)
A patented algorithm that saves up to an additional 25% of power with no loss in audio fidelity.
PPR uses the human hearing response, which is much less sensitive at low frequencies, along with DSM’s knowledge of the micro speaker’s frequency response to dynamically filter inaudible content.
Threshold for PPR is tunable in Maxim’s DSM Sound Studio GUI and can be set to an even more aggressive level to save even more power.
Controls for PPR include: Enable/Disable, Threshold.