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NXP has developed a range of audio libraries and collaborates with select partners to offer complementary specialized stacks. NXP solutions are fully integrated into the MCUXpresso SDK and comes with ready-to-use software examples to help you complete an in-depth evaluation and get started with your design. Partner solutions are fully compatible with MCUXpresso software and tools.
The NXP USB Stack is an Enabling Software Technology provided within the MCUXpresso SDK. The stack is architected into several layers to help application developers concentrate on developing the application instead of being concerned with communications related to low-level USB controller as well as the common framework defined in the USB 2.0 Specification for Host and Device Classes (including USB Audio).
The USB interface is well-suited for transport of audio ranging from low-fidelity voice connections to high-quality, multichannel audio streams. Many applications, from communications to entertainment to music recording and playback, can take advantage of the USB audio features.
MCUXpresso SDK examples support USB Audio Class 1.0 and 2.0. Starting with SDK v2.8.0, UAC2.0 is configured as the default implementation. For previous SDK v2.x releases, refer to select the USB device config header for USB audio class defines. Specific USB Audio examples can be found on some NXP development boards, depending on their capabilities.
| USB AUDIO | ||||
|---|---|---|---|---|
| Device Family* | Arm® Cortex® Core | HOST | DEVICE | ROM |
| K2x | Cortex-M4 | |||
| K6x | Cortex-M4 | |||
| K8x | Cortex-M4 | |||
| K32 L2x | Cortex-M0+ | |||
| K32 L3x | Cortex-M4 | |||
| LPC51U68 | Cortex-M0+ | |||
| LPC5411x | Cortex-M4 + Cortex-M0+ | |||
| LPC54S/540xx | Cortex-M4 | |||
| LPC54S018JxM | Cortex-M4 | |||
| LPC546xx | Cortex-M4 | |||
| LPC551x/S1x | Cortex-M33 | |||
| LPC552x/S2x | Cortex-M33 | |||
| LPC55S6x | Dual Cortex-M33 | |||
| i.MX RT6xx | Cortex-M33 + Cadence® Tensilicia® HiFi 4 | |||
| i.MX RT101x | Cortex-M7 | |||
| i.MX RT102x | Cortex-M7 | |||
| i.MX RT105x | Cortex-M7 | |||
| i.MX RT106x | Cortex-M7 | |||
| i.MX RT1170 | Cortex-M7 + Cortex-M4 | |||
*Functionality may not be available on all parts within families listed above.
Essential Audio Processing (EAP) is a bundle of audio processing blocks from NXP available in the MCUXpresso SDK for supported devices in the form of a pre-compiled library. The features included in EAP help enhance the tonal and spatial perception of the audio, resulting in an improved listening experience. Currently, EAP supports the following list of sound processing algorithms:
The EAP libraries are accompanied by a Tuning Tool, which allows you to simulate the behavior of the EAP library, listen to and compare the audio effects, and export your parameters to a compliant C header file.
| Device Family | Core | Co-Proccessor | Recommended Evaluation Board(s) [Click to access SDK] |
|---|---|---|---|
| i.MX RT600 | Cortex-M33 | Cadence® Tensilica® HiFi 4 audio DSP | MIMXRT685-EVK |
| i.MX RT1060 | Cortex-M7 | MIMXRT1060-EVK |
NXP has partnered with leaders in the area of audio technology to enable a range of specialized, high-performance solutions on a range of NXP MCUs based on Arm® Cortex®-M cores.
Alango’s DSP/MCU sound processing software technologies enhance the audio experience in Bluetooth-enabled headsets, smart speakers, tablets, and hearing enhancement devices.
Products available from Alango for NXP MCUs based on Cortex-M technology are shown below. Alango products also support several of NXP’s i.MX applications processors.
| Alango Product | Overview |
i.MX RT600 Cortex-M33-based MCU + Cadence Tensilica HiFi 4 DSP |
i.MX RT10xx Cortex-M7-based MCUs |
|---|---|---|---|
| Audio Enhancement Technologies |
Alango's suite of DP post processing technologies. ListenThrough™ ambient awareness intelligently passes through only important sounds. Automatic Volume and Equalization (AVQ) adjusts audio volume and spectrum in proportion to ambient noise spectrum. PersonaSound™ automatically personalizes all sound output (e.g. music, radio, phone calls, navigation prompts) to match a person’s unique hearing preferences. MuRefiner™ optimizes stereo, enhances spectral components, and adjusts bass. |
Create, tune, and productize audio features with Audio Weaver Designer, a low code, drag and drop real-time interface with live module inspectors and over 400 different audio building blocks. Deploy highly optimized audio with AWE Core.
Products available from DSP Concepts for NXP Arm® Cortex®-M-based microcontrollers are shown below. DSP Concepts products also support several of NXP’s i.MX applications processors.
| DSP Concepts Product | Overview |
i.MX RT600
Arm® Cortex® M33 plus Cadence Xtensa HiFi4 DSP |
i.MX RT10xx Cortex-M7-based MCUs |
|---|---|---|---|
| Audio Weaver Designer | A low code, drag and drop real-time interface with live module inspectors and over 400 different audio building blocks to integrate or create advanced audio features quickly. | ||
| AWE Core | A cross-platform audio-processing engine that’s hand-optimized for NXP's microcontrollers that are best suited for audio processing. It features a library of over 400 audio building-blocks that are used to rapidly build and deliver cutting-edge audio features. | ||
| Asynchronous Sample Rate Converter | A software-based solution for embedded products with multiple audio I/O streams, such as local microphones and speakers, Bluetooth, USB, and WiFi. |
