WM8958 enables HD audio in portable multimedia

When combined with Wolfson's Audioplus products, such as its digital silicon micro-electro-mechanical system (MEMS) microphones, power-management ICs and noise-cancellation solutions, the architecture-defining WM8958 helps to ensure HD quality audio.

This multi-channel ultra-low-power audio hub solution provides 100dB signal-to-noise ratio (SNR) during digital-to-analogue (DAC) playback, while its integrated stereo Class D/AB speaker driver and Class W headphone driver minimise power consumption during audio playback.

The WM8958 features an audio enhancement DSP that runs a multiband compressor (MBC).

This enables significantly louder and clearer sound from small speakers, without causing overload or damage.

Used in conjunction with an onboard parametric equaliser and dynamic range controller, the MBC provides the ability to boost and optimise speaker outputs to deliver superior audio playback for multimedia applications and ringtones.

Its stereo sample rate conversion and multi-channel digital mixing, combined with powerful analogue mixing, allows the WM8958 to support a range of architectures and use cases.

A smart digital microphone interface provides power regulation, a low jitter clock and decimation filters for up to four digital microphones, while active ground loop noise rejection and DC offset correction help prevent pop noise and suppress ground noise on the headphone outputs.