Play the latest Auro-3D sound source at home!Explore the possibility of implementation audio that revives the air of the concert venue

■ Utilizing the Ω player, I listened to the "AURO-3D" video content at home for a long time, so I did not feel uncomfortable in the sound field created by two left and right speakers. Recently, a wireless speaker that pursues realism with a single speaker and a technology to regenerate the three -dimensional sound field with a sound bar headphone have appeared, making it difficult to say that this is the correct answer. Now that I have more time to listen to music at home, my feelings for realism have been stronger than before, so I am interested in listening to music on non -stereo systems. Meanwhile, WOWOW, which is preparing music content that makes full use of imagive audio technology, has received news of a demonstration experiment to distribute high-resolution video works based on AURO-3D technology. We co -develop the "ω (メ ω) player" limited to iOS equipment and Mac with NTT Smart Connect, and prepare a wide range of programs from orchestra to jazz. With reference to the response of the listeners, the company plans to provide it as a unique premium content in the near future. I heard that headphones and existing surround systems could understand the effect of 3D sound, so I applied for a tester, registered equipment used, and tried it in my home audition room. The experiment is continuing until February 10, but the expiration date of the participation is approaching, so it is better for readers who are interested to hurry to register. Of course, it is not expensive because it is an experiment, but it is necessary to answer the questionnaire at the end of the experiment. This time, the MacBookPro and AV amplifiers (Denon "AVC-X6700H"), which installed the Ω player, were connected by HDMI and played with nine speakers (5.4ch without subwoofers). The video resolution is a full HD, combining Sony's "VPL-VW1100ES" and a 120-inch screen. ■ Auro-3D audition requires software and amplifiers on the amplifier side AVC-X6700H is compatible with AURO-3D, but the speaker configuration is set to "7.1 rear surround" in the Mac Audio MIDI settings, and the ω player side. It is necessary to prepare in advance according to the application manual, such as selecting "Pass -through" with auro3D output. I tried it with the AURO-3D compatible AV amplifier (Marantz "NR1711"), but by choosing a mode called Auroscene, the high-speaker playback sound can be reproduced in virtual, and the effect is based on the real high speaker. can get. The sampling frequency and the number of channels are different for each program, and in addition to AURO-3D, there is also a sound source encoded with HPL and MQA for headphones, so you can choose the optimal sound source from the list menu to the playback environment. 。 The first setting is a bit complicated, such as checking the "auro-3D" at the bottom right of the playback screen, but when the AVC-X6700H mode is manually switched to "AURO-3D", it is a vast 3D audio. The sound field spread throughout the room. There is also a test program to check the speaker configuration, so you should check it out first. ■ Experience in the actual concert. Listen to the "Arm Chair Conductor" that contains orchestras at the position of the conductor at the position of the conductor at the 96kHz/24bit AURO-3D sound source (9.1ch). A session recording program played by Norika Iimori and the Tokyo Symphony Orchestra at the Musa Kawasaki Symphony Hall, and there are many songs with large formations, such as Elgar's "Debu -duni" and Lespigi's "Roman Festival". Ravel's "Bolero" and Elgar's work installed an ultra -wide 8K camera at the position of the conductor, and only a slight can be seen by the commanding bars swayed by Norika Iimori in the left corner of the screen. Other songs capture the entire stage from right behind the conductor. The sound, where the orchestra develops over 180 degrees on the left and right, is exactly the sound field that you can experience at the conductor's position, and you can feel like you are a conductor. "Conductor at home" is a theme that classical fans want to try at least once, but the three -dimensional sounds experienced on the ω player are different from the music appreciation from the viewpoint of appreciation, and it is very interesting. The stage you see in the video is a familiar instrument arrangement with stringed instruments in front of you, and the woodwind, brass, and percussion instruments are lined up in the back, but as in the normal stage, the wind instrument group uses hinadan and sits higher than the string instrument. ing. Of course, you can see the appearance of each player, but the acoustic meaning is more important. Riding on the hinagi makes it easier for the sound to reach the audience, and the harmony is also increased. In addition, the camera position is close to the conductor, so the player sitting outside the woodwind or brass can sound almost from the side. If you listen to this sound source in stereo playback, you can enjoy it without any discomfort at first with a familiar balance, but when you switch to AURO-3D, the brass instruments at the back of the stage pass through the head of the string instrument group over the string instrument group. , The movement of the woodwind instruments and the melody of the solo player can be heard clearly. In stereo playback, the perspective before and after the stage is transmitted, but in AURO-3D, you can accurately hear the positional relationship of the stage and the hole, so you can accurately listen to the position of the stage and the hall, so you can experience it in the actual concert. " After immersing in the three -dimensional sound, if you switch to stereo playback again, you will feel relieved to the compact sound field that you are accustomed to listening to, but you will feel that the sound is sticking to the speaker. If you have a lot of opportunities to go to a concert hall, you will notice that AURO-3D's imagive audio is closer to the actual appreciation experience, but among music fans who often listen to audio devices, musical instruments are located and pronounced. Some people may be too real and feel uncomfortable. Of course, considering the conductor's perspective, Immersive Audio is actually closer. When you stand on the leading platform, you can feel the feeling of sound coming from all the orchestras in front of you in front of you, but you can experience it quite close to it. ■ The sense of the concert venue that share the air with the performer is vividly revived, such as the multiple plays and solo of the Tokyo Cathedral St. Mary Cathedral, and the Verdi Requiem played at the Vatican Cathedral The program recorded in the program that can reach the ceiling is the highlight of the scale of the organ that shakes the air. In Verdi, the banda trumpet is almost right beside, and the effect of contrasting with the chorus and orchestra in front is standing out. On the other hand, Bach's unaccompanied cello suck by Marimba has a rich harmony that is unlikely to be a performance in a single bath marrine. It is easy to think that the recording in the Tokyo Cathedral tends to be remarkable and the sound will be unclear, but because the arrangement of the microphone is appropriate, the attack of each sound is clear and the fast notes move. Instead, the flow of music is very natural and no stagnation. Immersive audio has the goodness of being able to reproduce the sound and lingering directly without clouding using multiple channels, and I think that the sound source recorded in AURO-3D is often faithfully reproduced the space of the concert venue. Most of the sound sources this time are recorded by WOWOW's hero. In addition to being familiar with the sound of various concert venues, it has been conveyed that he has a wealth of experience in implementing audio, and is properly driving the microphone balance in consideration of the characteristics of musical instruments and works. Some of the concerts and session recording during the distribution are also presented with the recording, and they experience the characteristics of the air and lingering characteristics of the performance site. At the site, I strongly realized the importance of sharing the air with the performers, but this feeling has revived from this high -resolution imagive sound source. In particular, I would like to report that the sound source recorded at the venue with a long reverberation time can be so immersed in music more naturally than stereo regeneration, and has gained a strong immersion in the performance.

Tadashi Yamanouchi