OnePlus Buds Pro 2 and Dynaudio joint tuning bring Android native-level spatial audio experience

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Sina Digital News reported on the evening of December 29 that OnePlus held an online communication meeting for OnePlus Buds Pro 2 true wireless noise-cancelling headphones this week, bringing the spatial audio that is known as the best Android ecological experience. TWS earphones developed by a new audio framework. It is reported that OnePlus Buds Pro 2 will be released together with OnePlus 11 on January 4.

OnePlus Buds Pro 2 has two colors, Obsidian Black and Arbor Green. The obsidian black color matching earphone box has a matte texture, the lower part of the earphone rod has a metal texture, and the upper part has a matte texture, and the overall texture is very textured. The weight of one ear is 4.9g, and it is also very comfortable in the ear.

The Gospel of Bowheads——Cervical Spine Health Inspection and Reminder

Let me talk about a more interesting feature first. OnePlus Buds Pro 2 is the industry’s first TWS headset that supports full-link cervical spine health. Now most of the students and office workers have more or less cervical spine problems caused by improper sitting posture. OnePlus Buds Pro 2 can monitor your head posture in real time, whether you often lower your head, and lower your head for a certain period of time, and the earphones will also remind you. If you use it for more than an hour a day, OnePlus Buds Pro 2 will also generate a dedicated cervical spine pressure report to help you understand your sitting posture and whether it is causing pressure on the cervical spine.

The first TWS headset developed based on the new audio framework of Android 13 – native spatial audio

At the meeting, the product manager of OnePlus Buds Pro 2 also shared that OnePlus has done five things to do a good job in spatial audio: “One is to cooperate with Google to formulate a spatial audio standard based on Android 13; the other is to cooperate with Dolby Debugging, combined with OnePlus 11 to bring a spatial audio rendering algorithm based on Dolby Atmos; third, in-depth debugging of hardware and software at the headphone end; fourth, self-developed stereo upmixing algorithm, so that dual-channel sound sources also have spatial audio Effect, and finally brought the best spatial audio experience. And also made up its mind on the content ecology, OPPO Music first provided 3,000 remade high-definition spatial audio music, and cooperated with iQiyi to provide massive spatial audio and video, and long-term operation .”

Talking about the spatial audio of the Android system, in fact, before the release of Android 13, there were no standards related to spatial audio in the industry, and Google did not provide support for spatial audio at the Android system level. Even if the spatial audio content is provided by a third-party APP, the Android framework layer can only output 2.0 stereo streams to the device layer. Many earphone manufacturers and APP developers on the market want to achieve spatial audio effects, so they can only build a spatial audio ecosystem by themselves. But it also created a lot of compatibility issues.

In August 2021, OnePlus and Google formed a research and development team. After ten months of research and development testing, at the Google Worldwide Developers Conference in May this year, Android 13 officially supported spatial audio, and OnePlus Buds Pro 2 is also the first TWS headset developed based on the new audio framework of Android 13.

Self-developed upmixing algorithm – stereo and spatial audio

The first step solves the problem of the underlying framework, and the second step is how to make stereo content into 5.1 or even 7.1 multi-channel. Traditional stereo resources still use the old version of the framework, resulting in the final output is still stereo. And the current spatial audio content on the market is not rich, even in the spatial audio area of ​​the music app, most of the audio-visual content is still stereo. Based on the Android 13 spatial audio standard, OnePlus has developed a spatial stereo upmixing algorithm and integrated it into the ColorOS 13 system framework. With this set of algorithms, the stereo bit stream is processed by the spatial stereo upmixing algorithm at the frame layer, and can be simulated as multi-channel surround sound output to the mixer, and the head tracking data is fused in the renderer to simulate the absence of the stereo bit stream. Sound size, direction, distance and other information. When using OnePlus Buds Pro 2 to listen to stereo resources, you can also feel the rendering effect of spatial audio.

In the noise reduction part, the OnePlus Buds Pro 2 has a noise reduction depth of up to 48dB, which is 8dB higher than that of the first generation. The noise reduction bandwidth is up to 4kHz, which can effectively improve the noise reduction effect of medium and high frequencies. With the earphone charging case, the battery life can last up to 39 hours, charging for ten minutes, and listening to music for seven hours.

In terms of sound quality, OnePlus and Dynaudio jointly developed a dual-unit acoustic system and jointly tuned it with Dynaudio. At the meeting, the product manager of OnePlus Buds Pro 2 also said: “The hardware of this cooperation between OnePlus and Dynaudio is independent of the Enco X2 series; and the tuning style will also be based on the needs of users of different brands. , Do different tuning customization.” In addition, OnePlus Buds Pro 2 is also jointly debugged with Dolby, and it can bring spatial audio effects based on Dolby Atmos when paired with OnePlus 11. OPPO Music has also set up a space audio zone, and 3,000 remakes of space audio music have been put on the shelves. OnePlus Buds Pro 2 will be released together with OnePlus 11 on January 4th. Interested friends can wait for the release to experience the first Android ecological native spatial audio headset offline.

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